Folded combination horn pad and driver position sensor assembly and method for providing the assembly

• US 5,961,144 A
• Filed: 11/12/1997
• Issued: 10/05/1999
• Est. Priority Date: 11/12/1997
• Status: Expired due to Fees

• Current Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Limited (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Desmarais, Mark R.
• Primary Examiner(s): English, Peter C.
• Application Number:
  US08/968,622
• Time in Patent Office: 692 Days
• Field of Search: 280/731, 280/735, 280/728.3, 701/45, 307/10.1, 200/61.54
• US Class Current: 280/731
• CPC Class Codes: B60Q 5/003 mounted on the steering wheel
• CPC Class Codes: B60R 21/01532 using electric or capacitive field sensors
• CPC Class Codes: B60R 21/21658 with integrated switches, e.g. horn switches

Abstract

An apparatus (12) is a combination horn pad and driver position sensor. The apparatus (12), in its function as a horn pad, provides a signal to a horn activator circuit (30) when a deforming pressure is applied to the apparatus. The horn activator circuit (30) causes an audible horn (28) to sound. The apparatus (12), in its function as a driver position sensor, senses a distance between a vehicle driver (22) and the apparatus. A driver/monitor circuit (60) is operatively connected to the apparatus (12) to operate the apparatus in its sensor function, and to provide a signal (58) regarding the sensed distance to a controller (50) of an inflatable restraint system (20). The apparatus (12) has a field-effect circuit (e.g., 74) and a ground plate circuit (e.g., 76), for providing the sensor function, and a horn pad circuit (e.g., 78). The apparatus (12) also has a sheet of substrate material, which is folded to define a plurality of planar portions (e.g., 68-72) for providing a plurality of stacked parallel circuit areas. The three circuits (74-78) extend on the planar portions (68-72).

Claims

1. An apparatus for providing control signals for at least one vehicle system, said apparatus comprising:

first circuit means for sensing distance between a vehicle occupant and said first circuit means, and for providing a signal indicative thereof;

second circuit means for sensing deformation of said second circuit means caused by pressure applied to said second circuit means, and for providing a signal indicative thereof; and

substrate means for supporting said first and second circuit means in a stacked arrangement, said substrate means including means defining a plurality of planar portions for providing a plurality of stacked, substantially parallel circuit areas in said stacked arrangement, said first circuit means extending on one of said circuit areas, and said second circuit means extending on another one of said circuit areas.

2. An apparatus as set forth in claim 1, wherein said substrate means includes a folded sheet of substrate material folded, said defined planar portions are on said sheet of substrate material and adjacent to at least one fold.

3. An apparatus as set forth in claim 1, wherein the at least one vehicle system for which said apparatus provides control signals includes an occupant restraint system having an adjustable aspect, and an audible horn system, said signal provided by said first circuit means is for control of the adjustable aspect of the occupant restraint system, and said signal provided by said second circuit means indicative of deformation results in an audible signal being emitted from the horn system.

4. An apparatus as set forth in claim 1, wherein said first circuit means includes a field-effect circuit for detecting a capacitance of an electric field and a ground plate circuit for controlling the electric field.

5. An apparatus as set forth in claim 4, wherein said means defining a plurality of planar portions defines three planar portions, said field-effect circuit of said first circuit means extends on the circuit area of a first one of said planar portions, said ground plate circuit of said first circuit means extends on the circuit area of a second one of said planar portions, and said second circuit means extends on the circuit area of a third one of said planar portions.

6. An apparatus as set forth in claim 5, wherein said second planar portion with the ground plate circuit is located between the first and third planar portions.

7. An apparatus as set forth in claim 4, wherein said field-effect circuit and said second circuit means extend on the circuit area of a first one of the planar portions, and said ground plate circuit extends on the circuit area of a second one of the planar portions.

8. An apparatus as set forth in claim 1 including means for mounting said apparatus within a vehicle steering wheel hub between a driver'"'"'s side restraint module and a steering wheel hub cover such that said first circuit means senses a distance between a vehicle driver and said first circuit means.

9. An apparatus for providing control signals for at least one vehicle system, said apparatus comprising:

first circuit means for sensing distance between a vehicle occupant and said first circuit means, and for providing a signal indicative thereof;

second circuit means for sensing deformation of said second circuit means caused by pressure applied to said second circuit means, and for providing a signal indicative thereof; and

a sheet of substrate material folded to define a plurality of planar portions for providing a plurality of stacked, substantially parallel circuit areas, said first circuit means extending on one of said circuit areas of said sheet of substrate material, and said second circuit means extending on another one of said circuit areas of said sheet of substrate material.

10. An apparatus as set forth in claim 9, wherein the at least one vehicle system for which said apparatus provides control signals includes an occupant restraint system having an adjustable aspect, and an audible horn system, said signal provided by said first circuit means is for control of the adjustable aspect of the occupant restraint system, and said signal provided by said second circuit means indicative of deformation results in an audible signal being emitted from the horn system.

11. An apparatus as set forth in claim 9, wherein said first circuit means includes a field-effect circuit for detecting a capacitance of an electric field and a ground plate circuit for controlling the electric field.

12. An apparatus as set forth in claim 11, wherein said sheet has two folds and defines three planar portions, said field-effect circuit of said first circuit means extends on the circuit area of a first one of said planar portions, said ground plate circuit of said first circuit means extends on the circuit area of a second one of said planar portions, and said second circuit means extends on the circuit area of a third one of said planar portions.

13. An apparatus as set forth in claim 12, wherein said second planar portion with the ground plate circuit is located between the first and third planar portions.

14. An apparatus as set forth in claim 11, wherein said field-effect circuit and said second circuit means extend on the circuit area of a first one of the planar portions, and said ground plate circuit extends on the circuit area of a second one of the planar portions.

15. An apparatus as set forth in claim 9, wherein said substrate material is flexible in response to pressure applied by a hand of the vehicle occupant.

16. An apparatus as set forth in claim 15, wherein said second circuit means is flexible to deform upon flexing of said sheet of substrate material.

17. An apparatus as set forth in claim 9, wherein said sheet of substrate material is made of dielectric material.

18. An apparatus as set forth in claim 9 including means for mounting said apparatus within a vehicle steering wheel hub between a driver'"'"'s side restraint module and a steering wheel hub cover such that said first circuit means senses a distance between a vehicle driver and said first circuit means.

19. An apparatus for providing control signals for at least one vehicle system, said apparatus comprising:

first circuit means for sensing an electric field indicative of distance between a vehicle occupant and said first circuit means, and for providing a signal indicative thereof;

second circuit means for directing the electric field sensed by said first circuit means; and

substrate means for supporting said first and second circuit means in a stacked arrangement, said substrate means including means defining a plurality of planar portions for providing a plurality of stacked, substantially parallel circuit areas in said stacked arrangement, said first circuit means extending on one of said circuit areas, and said second circuit means extending on another one of said circuit areas.

20. An apparatus as set forth in claim 19, wherein the at least one vehicle system for which said apparatus provides control signals includes an occupant restraint system having an adjustable aspect, said signal provided by said first circuit means is for control of the adjustable aspect of the occupant restraint system.

21. An apparatus as set forth in claim 19, wherein said first circuit means includes a field-effect circuit for detecting a capacitance of the electric field, said second circuit means includes a ground plate circuit for controlling the electric field.

22. An apparatus as set forth in claim 21 including a horn pad circuit for sensing deformation of said horn pad circuit caused by pressure applied to said horn pad circuit, and for providing a signal indicative thereof, and wherein said means defining a plurality of planar portions defines three planar portions, said field-effect circuit of said first circuit means extends on the circuit area of a first one of said planar portions, said ground plate circuit of said second circuit means extends on the circuit area of a second one of said planar portions, and said horn pad circuit extends on the circuit area of a third one of said planar portions.

23. An apparatus as set forth in claim 22, wherein said second planar portion with the ground plate circuit is located between the first and third planar portions.

24. An apparatus as set forth in claim 19 including means for mounting said apparatus within a vehicle steering wheel hub between a driver'"'"'s side restraint module and a steering wheel hub cover such that said first circuit means senses a distance between a vehicle driver and said first circuit means.

25. An apparatus for providing control signals for at least one vehicle system, said apparatus comprising:

first circuit means for sensing an electric field indicative of distance between a vehicle occupant and said first circuit means, and for providing a signal indicative thereof;

second circuit means for directing the electric field sensed by said first circuit means; and

a sheet of substrate material folded to define a plurality of planar portions for providing a plurality of stacked, substantially parallel circuit areas, said first circuit means extending on one of said circuit areas of said sheet of substrate material, and said second circuit means extending on another one of said circuit areas of said sheet of substrate material.

26. An apparatus as set forth in claim 25, wherein the at least one vehicle system for which said apparatus provides control signals includes an occupant restraint system having an adjustable aspect, said signal provided by said first circuit means is for control of the adjustable aspect of the occupant restraint system.

27. An apparatus as set forth in claim 25, wherein said first circuit means includes a field-effect circuit for detecting a capacitance of the electric field, said second circuit means includes a ground plate circuit for controlling the electric field.

28. An apparatus as set forth in claim 27 including a horn pad circuit for sensing deformation of said horn pad circuit caused by pressure applied to said horn pad circuit, and for providing a signal indicative thereof, and wherein said sheet has two folds and defines three planar portions, said field-effect circuit of said first circuit means extends on the circuit area of a first one of said planar portions, said ground plate circuit of said second circuit means extends on the circuit area of a second one of said planar portions, and said horn pad circuit extends on the circuit area of a third one of said planar portions.

29. An apparatus as set forth in claim 28, wherein said second planar portion with the ground plate circuit is located between the first and third planar portions.

30. An apparatus as set forth in claim 27 including a horn pad circuit for sensing deformation of said horn pad circuit caused by pressure applied to said horn pad circuit, and for providing a signal indicative thereof, and wherein said field-effect circuit and said horn pad circuit extend on the circuit area of a first one of the planar portions, and said ground plate circuit extends on the circuit area of a second one of the planar portions.

31. An apparatus as set forth in claim 25 including means for mounting said apparatus within a vehicle steering wheel hub between a driver'"'"'s side restraint module and a steering wheel hub cover such that said first circuit means senses a distance between a vehicle driver and said first circuit means.

32. A method for providing an apparatus which outputs control signals for at least one vehicle system, said method comprising:

providing a plurality of planar portions of substrate material, each planar portion having a circuit area;

mounting first circuit means, which senses distance between a vehicle occupant and the first circuit means and which provides a signal indicative thereof, on a first one of the circuit areas such that the first circuit means extends on the first circuit area; and

mounting second circuit means, which senses deformation of the second circuit means caused by pressure applied to the second circuit means and which provides a signal indicative thereof, on a second one of the circuit areas such that the second circuit means extends on the second circuit area.

33. A method for providing an apparatus which outputs control signals for at least one vehicle system, said method comprising:

providing a sheet of foldable substrate material, which has a plurality of circuit areas;

mounting first circuit means, which senses distance between a vehicle occupant and the first circuit means and which provides a signal indicative thereof, on a first one of the circuit areas of the substrate material such that the first circuit means extends on the first circuit area of the substrate material;

mounting second circuit means, which senses deformation of the second circuit means caused by pressure applied to the second circuit means and which provides a signal indicative thereof, on a second one of the circuit areas of the substrate material such that the second circuit means extends on the second circuit area of the substrate material; and

folding the sheet of substrate material to impose the first circuit area over the second circuit area, such that the first circuit area, with the first circuit means, is stacked upon the second circuit area, with the second circuit means.

34. A method as set forth in claim 33, wherein said step of folding includes folding the sheet substrate material twice to define three planar portions.

35. A method as set forth in claim 34, wherein said step of mounting the first circuit means includes providing a field-effect circuit portion of the first circuit means, which detects a capacitance of an electric field, to extend on a first one of the planar portions of the sheet, and providing a ground plate circuit portion of the first circuit means, which controls the electric field, to extend on a second one of the planar portions of the sheet, and wherein said step of mounting the second circuit means includes providing the second circuit means to extend on a third one of the planar portions.

36. A method as set forth in claim 33, wherein said step of folding includes folding the sheet of substrate material once to define two planar portions.

37. A method as set forth in claim 36, wherein said step of providing the first circuit means includes providing a field-effect circuit portion of the first circuit means, which detects a capacitance of an electric field, to extend on a first one of the planar portions of the sheet, and providing a ground plate circuit portion of the first circuit means, which controls the electric field, to extend on a second one of the planar portions of the sheet;

and wherein said step of providing the second circuit means includes providing the second circuit means to extend on the first planar portion.

38. A method for providing an apparatus which outputs control signals for at least one vehicle system, said method comprising:

providing a sheet of foldable substrate material, which has a plurality of circuit areas;

mounting first circuit means, which senses an electric field indicative of distance between a vehicle occupant and the first circuit means and which provides a signal indicative thereof, on a first one of the circuit areas of the substrate material such that the first circuit means extends on the first circuit area of the substrate material;

mounting second circuit means, which directs the electric field sensed by the first circuit means, on a second one of the circuit areas of the substrate material such that the second circuit means extends on the second circuit area of the substrate material; and

folding the sheet of substrate material to impose the first circuit area over the second circuit area, such that the first circuit area, with the first circuit means, is stacked upon the second circuit area, with the second circuit means.

39. A method as set forth in claim 38, wherein said step of folding includes folding the sheet substrate material twice to define three planar portions.

40. A method as set forth in claim 39 including providing a horn pad circuit, which senses deformation of the horn pad circuit caused by pressure applied to the horn pad circuit and which provides a signal indicative thereof, on one of the planar portions.

41. A method as set forth in claim 38, wherein said step of folding includes folding the sheet of substrate material once to define two planar portions.

42. A method as set forth in claim 41 including providing a horn pad circuit, which senses deformation of the horn pad circuit caused by pressure applied to the horn pad circuit and which provides a signal indicative thereof, on the same one of the planar portions as the first circuit means.