Self-diagnostic switch

• US 8,085,141 B2
• Filed: 05/22/2007
• Issued: 12/27/2011
• Est. Priority Date: 07/31/2006
• Status: Active Grant

• Current Assignee: Illinois Tool Works Inc.
• Original Assignee: Illinois Tool Works Inc.
• Inventors: Hill, Gerald W., Truesdale, Brian J., Kielian, Slawomir P.
• Primary Examiner(s): Lee, Benjamin C
• Assistant Examiner(s): MEHRAVARI, PETER CYRUS
• Application Number:
  US11/805,009
• Publication Number:
  US 20080024314A1
• Time in Patent Office: 1,680 Days
• Field of Search: 340/446, 340/644, 340/691.1, 340/691.3, 367/117, 310313 A-313 D, 333193-196, 345/117, 345/177, 345/173, 702/34, 702/84
• US Class Current: 340/446
• CPC Class Codes: H03K 17/96 Touch switches specially adapted for electronic time-pieces with no moving parts G04G21/08
• CPC Class Codes: H03K 2217/96011 with propagation, SAW or BAW

Abstract

A self-diagnostic acoustic wave touch actuated switch assembly includes a substrate having an acoustic wave cavity, a transducer operatively connected to the acoustic wave cavity, a processing unit, and at least one light emitting member operatively connected to the processing unit. The transducer is configured to generate a trapped acoustic wave within the acoustic wave cavity. The processing unit is operatively connected to one or both of the acoustic wave cavity and/or the transducer. The processing unit may be configured to activate the at least one light emitting member when the processing unit detects one or both of a switch malfunction and/or a potential switch malfunction.

Claims

1. A self-diagnostic acoustic wave touch actuated switch assembly comprising:

a substrate including an acoustic wave cavity having a touch surface;

a housing integrally connected to said substrate, wherein said housing extends over, under, or around said acoustic wave cavity to define a perimeter, said housing configured to be inserted into a panel such that said perimeter defined by said housing is disposed in said panel while said touch surface of said substrate is disposed outside said panel;

a transducer operatively connected to said acoustic wave cavity and disposed within said perimeter that is defined by said housing, said transducer configured to generate a trapped acoustic wave within said acoustic wave cavity;

a processing unit operatively connected to at least one of said acoustic wave cavity or said transducer, said processing unit being secured within said perimeter that is defined by said housing; and

at least one light emitting member operatively connected to said processing unit, said at least one light emitting member being directly fixed to said substrate proximate to said transducer within said perimeter that is defined by said housing, wherein said processing unit activates or deactivates said at least one light emitting member depending on an operating condition of the switch assembly.

2. The switch assembly of claim 1, wherein said processing unit is configured to activate or deactivate said at least one light emitting member when said processing unit detects at least one of a switch malfunction or a potential switch malfunction.

3. The switch assembly of claim 2, wherein said processing unit compares an actual response related to a generated trapped acoustic wave to an acceptable response related to proper switch operation.

4. The switch assembly of claim 3, wherein said processing unit detects proper switch operation when the actual response is within an acceptable response range, and wherein said processing unit detects the switch malfunction when the actual response is outside of the acceptable response range.

5. The switch assembly of claim 4, wherein said processing unit detects the potential switch malfunction when the actual response is within the acceptable response range, but outside of a smaller sub-range within the acceptable response range.

6. The switch assembly of claim 1, wherein said at least one light emitting member comprises at least one light emitting diode.

7. The switch assembly of claim 1, further comprising a printed circuit board secured with respect to said substrate, said processing unit being connected to said printed circuit board within said perimeter that is defined by said housing.

8. The switch assembly of claim 1, further comprising at least one input/output connector.

9. The switch assembly of claim 1, further comprising at least one light pipe disposed within said perimeter that is defined by said housing, said at least one light pipe secured to said at least one light emitting member, said at least one light emitting member configured to emit light through said at least one light pipe.

10. The switch assembly of claim 1, wherein said at least one light emitting member is configured to emit light through said substrate.

11. The switch assembly of claim 1, wherein said processing unit activates said at least one light emitting member at a steady state to indicate a first operating condition, a flashing state to indicate a second operating condition, and a deactivated state to indicate a third operating condition.

12. The switch assembly of claim 11, wherein the first operating condition is a malfunctioning condition, the second operating condition is a potential malfunctioning condition, and the third operating condition is a proper functioning condition.

13. The switch assembly of claim 1, wherein said processing unit activates said at least one light emitting member to emit a first colored light to indicate a first operating condition, and a second colored light to indicate a second operating condition.

20. The switch assembly of claim 9, wherein said at least one light pipe extends through said touch surface.

22. The self-diagnostic switch of claim 1, wherein said housing comprises a threaded outer surface, wherein said housing is configured to be threadably secured to a panel through said threaded outer surface.

25. The switch assembly of claim 9, wherein said at least one light pipe is entirely disposed within said perimeter that is defined by said housing.

14. A self-diagnostic acoustic wave touch actuated switch assembly comprising:

a substrate including an acoustic wave cavity having a touch surface;

a transducer operatively connected to said acoustic wave cavity, said transducer configured to generate a trapped acoustic wave within said acoustic wave cavity;

a housing integrally connected to said substrate, wherein said housing extends over, under, or around said acoustic wave cavity to define a perimeter, said housing configured to be inserted into a panel such that said perimeter defined by said housing is disposed within said panel with said touch surface of said substrate disposed outside of said panel;

a printed circuit board secured within said perimeter that is defined by said housing;

a processing unit operatively connected to at least one of said acoustic wave cavity or said transducer, said processing unit being connected to said printed circuit board, said processing unit and said printed circuit board being secured within said perimeter that is defined by said housing;

at least one light emitting member operatively connected to said processing unit, said at least one light emitting member being secured within said perimeter that is defined by said housing, wherein said at least one light emitting member is directly fixed to said substrate proximate to said transducer;

at least one light pipe disposed in said perimeter defined by said housing and secured to said at least one light emitting member, said at least one light emitting member configured to emit light through said at least one light pipe; and

at least one input/output connector disposed within said perimeter defined by said housing and connected to said processing unit, wherein said processing unit activates or deactivates said at least one light emitting member depending on an operating condition of the switch assembly.

15. The switch assembly of claim 14, wherein said processing unit is configured to activate or deactivate said at least one light emitting member when said processing unit detects at least one of a switch malfunction or a potential switch malfunction, wherein said processing unit compares an actual response related to a generated trapped acoustic wave to an acceptable response related to proper switch operation, wherein said processing unit detects proper switch operation when the actual response is within an acceptable response range, and wherein said processing unit detects the switch malfunction when the actual response is outside of the acceptable response range, and wherein said processing unit detects the potential switch malfunction when the actual response is within the acceptable response range, but outside of a smaller sub-range within the acceptable response range.

16. The switch assembly of claim 14, wherein said at least one light emitting member is configured to emit light through said substrate.

17. The switch assembly of claim 14, wherein said processing unit activates said at least one light emitting member at a steady state to indicate a first operating condition, a flashing state to indicate a second operating condition, and a deactivated state to indicate a third operating condition, wherein the first operating condition is a malfunctioning condition, the second operating condition is a potential malfunctioning condition, and the third operating condition is a proper functioning condition.

18. The switch assembly of claim 14, wherein said processing unit activates said at least one light emitting member to emit a first colored light to indicate a first operating condition, and a second colored light to indicate a second operating condition.

23. The self-diagnostic switch of claim 14, wherein said housing comprises a threaded outer surface, wherein said housing is configured to be threadably secured to a panel through said threaded outer surface.

26. The self-diagnostic acoustic switch of claim 14, wherein said at least one light pipe is entirely disposed within said perimeter that is defined by said housing.

19. A self-diagnostic acoustic wave touch actuated switch assembly comprising:

a housing configured to be inserted into a panel;

a substrate integrally connected to said housing, said substrate including an acoustic wave cavity having a touch surface configured to be engaged to actuate the switch assembly, wherein said housing extends over, under, or around said acoustic wave cavity to define a perimeter and such that said touch surface of said substrate is disposed outside of said panel;

a processing unit disposed within said perimeter defined by said housing, said processing unit monitoring operation of the switch assembly; and

at least one light emitting member disposed within said perimeter defined by said housing and operatively connected to said processing unit, wherein said at least one light emitting member is directly fixed to said substrate proximate a transducer, said processing unit activating or deactivating said at least one light emitting member depending on an operating condition of the switch assembly.

21. The self-diagnostic acoustic wave touch actuated switch assembly of claim 19, further comprising at least one light pipe secured to said at least one light emitting member, said at least one light pipe extending through said touch surface.

24. The self-diagnostic switch of claim 19, wherein said housing comprises a threaded outer surface, wherein said housing is configured to be threadably secured to a panel through said threaded outer surface.

27. The self-diagnostic switch of claim 21, wherein said at least one light pipe is entirely disposed within said perimeter that is defined by said housing.