Button assembly with status indicator and programmable backlighting

• US 7,432,460 B2
• Filed: 04/11/2007
• Issued: 10/07/2008
• Est. Priority Date: 02/28/2001
• Status: Expired due to Term

• Current Assignee: Legrand Home Systems Incorporated (Legrand SA)
• Original Assignee: Vantage Controls, Inc. (Legrand SA)
• Inventors: Allen, Douglas E., Day, Wallace E., Clegg, Paul T.
• Primary Examiner(s): Friedhofer; Michael A
• Application Number:
  US11/786,574
• Publication Number:
  US 20070209913A1
• Time in Patent Office: 545 Days
• Field of Search: 200/5.A, 200/517, 200341-345, 200/310, 200/314, 341/22, 341/23, 341/28, 345168-170
• US Class Current: 200/5.00A
• CPC Class Codes: H01H 13/70 having a plurality of operating members associated with different sets of contacts, e.g. keyboard mounting together a plurality of independent switches H02B
• CPC Class Codes: H01H 2207/048 Inductive or infrared coupling
• CPC Class Codes: H01H 2219/062 Light conductor
• CPC Class Codes: H01H 2221/056 Modular conception
• CPC Class Codes: H01H 2221/066 replaceable
• CPC Class Codes: H01H 2223/058 flush mounted
• CPC Class Codes: H01H 2229/022 Modular assembly
• CPC Class Codes: H01H 2237/004 Cantilever
• CPC Class Codes: H01H 2239/016 combined with start switch, discrete keyboard
• CPC Class Codes: H01H 2300/03 Application domotique, e.g. for house automation, bus connected switches, sensors, loads or intelligent wiring
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 20/14 Protecting elements, switches, relays or circuit breakers
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A configurable switch matrix assembly with button assembly is disclosed for keypads used in devices such as primary control points for automation systems in homes vehicles, or commercial environments. The configurable switch matrix assembly preferably includes a frame for supporting a plurality of positionable cross members and optionally a baffle. The cross members and frame each preferably include cantilevers which can be deflected by pressing the button assemblies to activate switches associated with the keypad. Dynamic status lights and back lights may provide illumination of varying colors and intensities. Button labels may be easily replaced in the button assemblies. Button assemblies of different sizes and shapes may be easily attached to the configurable switch matrix assembly in various configurations without the need for different attaching devices for each situation and/or environment.

Claims

1. A keypad assembly comprising:

a support frame, the support frame comprising a first support, a second support, a third support and a fourth support;

a cross member having a first and second ends, the cross member being attached to the third and fourth support to form one or more button positions, each button position comprising a first cantilever and a second cantilever;

at least one first cantilever disposed on the first support or the second support;

at least one second cantilever disposed on the cross member;

a guide post disposed on the first end of the cross member;

a protruding ledge disposed on the second end of the cross member;

a receiving channel disposed on the third support;

a cutout disposed on the fourth support;

a circuit board, said circuit board comprising a switch for each button position;

a button or key releasably attached in each button position, each button or key comprising a bottom surface, said bottom surface non-fixidly engaging the first and second cantilevers; and

whereby the switch for each button position may be actuated by depressing its associated button or key, said first and second cantilevers restoring the depressed button or key to its prior position when released.

2. The keypad assembly of claim 1 wherein said first and second cantilevers of each button position exert a force to maintain their associated button or key in an undepressed position.

3. The keypad assembly of claim 1 wherein each button position comprises a first side and a second side, said first cantilever protruding from the first side and said second cantilever protruding from the second side.

4. The keypad assembly of claim 3 wherein the first cantilever is substantially parallel to the first side and the second cantilever is substantially parallel to the second side.

5. The keypad assembly of claim 1 wherein the first and second cantilevers each comprise an attached end and free end, said free end having a protrusion for non-fixidly engaging the bottom surface of the button or key.

6. The keypad assembly of claim 1 wherein the cross member is attached to the frame by (a) inserting the guide post into the cutout on the fourth support, and (b) inserting the protruding ledge into the receiving channel on the third support.

7. The keypad assembly of claim 1 wherein the circuit board further comprises a first light source and a second light source for each button position, said first light source illuminating a first region on the button or key and the second light source illuminating a second region on the button or key.

8. The keypad assembly of claim 7 wherein each button position further comprises a light shroud, said light shroud comprising a top, a bottom, and a hollow light channel, said light shroud disposed over said first light source.

9. The keypad assembly of claim 8 wherein the button or key comprises a button assembly, said button assembly comprising a lens and a base, said base further comprising an open passage disposed over the top of the shroud thereby allowing light emitted from the first light source to pass through the base unimpeded to illuminate the first region.

10. The keypad assembly of claim 9 wherein light emitted from the second light source travels through the base to illuminate the second region, said base composed of a semi-transparent material to diffuse the light emitted from the second light source.

11. The keypad assembly of claim 7 wherein the second light source is comprised of a first plurality of light sources controlled by a micro-processor, said first plurality of light sources capable of producing light of varying colors as dictated by the micro-processor.

12. The keypad assembly of claim 11 wherein the first light source is comprised of a second plurality of light sources controlled by a micro-processor, said second plurality of light sources capable of producing light of varying colors as dictated by the micro-processor.

13. The keypad assembly of claim 12 wherein the first and second plurality of light sources each comprise two or more LEDs.

14. The keypad assembly of claim 13 wherein the two or more LEDs comprises a red, green and blue LED.

15. The keypad assembly of claim 14 wherein the base comprises a top surface having a recessed portion, said lens releasably attaching to the recessed portion, a label being interposed between the lens and the recessed portion of the top surface of the base, wherein the label is illuminated by both the first light source and the second light source.

16. The keypad assembly of claim 1 wherein the cross member further comprises an integrated lens and an IR receiver, the integrated lens and IR receiver being adapted to accept IR signals.