Electrical switch for use in an automotive vehicle

• US 5,744,769 A
• Filed: 05/01/1995
• Issued: 04/28/1998
• Est. Priority Date: 09/13/1993
• Status: Expired due to Term

• Current Assignee: Lear Corporation EEDS and Interiors Incorporated (Lear Corporation)
• Original Assignee: United Technologies Automotive, Inc. (Lear Corporation)
• Inventors: Wright, James B., Valade, Ernest Peter, Poleschuk, LeRoy A., Proctor, Thomas H.
• Primary Examiner(s): Gellner, Michael L.
• Assistant Examiner(s): Friedhofer, Michael A.
• Application Number:
  US08/431,899
• Time in Patent Office: 1,093 Days
• Field of Search: 200/4, 200/5 R, 200/5 A, 200/6 R, 200/6 A, 200/17 R, 200/18, 200/61.27, 200/61.54, 200/293, 200/295, 200/303, 200/307, 200/332, 200/335, 200/339, 307/9.1, 307/10.1
• US Class Current: 200/61.54
• CPC Class Codes: B60Q 1/1469 controlled by or attached to a single lever, e.g. steering column stalk switches
• CPC Class Codes: B60Q 1/425 using a latching element for resetting a switching element
• CPC Class Codes: G05G 9/04796 for rectilinear control along the axis of the controlling member

Abstract

An electrical switch for use in an automotive vehicle includes an actuator and a carrier movable to electrically actuate a steering column tilting device and a steering column telescoping device. A post and a receptacle assist to align the carrier during its linear switching movement. An actuator assembly is provided which includes a shaft, a partially spherical ball, a first set of crossed arms and a second set of crossed arms while a centering spring biases an actuator toward a centralized neutral position. A modularized electrical switch is also mechanically and electrically connected to a second circuit and housing in a single assembly motion.

Claims

1. In combination, an electrical switch and a steering column, said combination comprising:

first conductive means for conducting electric current;

second conductive means for conducting electric current;

a carrier linearly movable relative to said first and second conductive means;

contactor means riding upon said carrier operable for conducting electric current between said first and second conducting means, wherein a back and forth movement of said contactor means along a first direction causes telescoping movement of the steering column and a back and forth movement of said contactor means along a second direction causes tilting movement of the steering column;

a nonpivoting post oriented substantially normal to a plane defined by surfaces of said first and second conductive means;

a receptacle having at least one groove for engaging with a distal end of said post; and

said post and said receptacle assisting to align said carrier during movement.

2. The electrical combination of claim 1 further comprising:

an actuator assembly having a shaft with an occupant accessible button mounted on a first end thereof, said actuator assembly further having a pedestal segment with a finger projecting therefrom, said actuator assembly pivotable relative to said plane defined by said first and second conductive means;

at least one cradle projecting from at least one side of said carrier;

at least one lower arm protruding from said actuator and causing linear movement of said carrier upon movable engagement of said at least one lower arm with said at least one cradle; and

a stationary guide having at least one groove for engaging with said finger.

3. The combination of claim 2 wherein said at least one groove of said guide includes a pair of crossed grooves oriented parallel to said plane, an intersection of said pair of crossed grooves defining a centralized detent for said finger.

4. The combination of claim 3 further comprising a switch housing having said post and said guide disposed thereupon.

5. The combination of claim 2 further comprising:

a return spring disposed within said pedestal segment;

said finger being defined as a longitudinally movable plunger outwardly biased by said return spring; and

at least part of said pedestal segment of said actuator assembly extending through an aperture within said carrier, said actuator assembly pushing said carrier in response to pivoting actuation of said button.

6. The combination of claim 2 further comprising:

a partially spherical ball disposed on said actuator assembly;

a cover having support means for journally engaging with said ball, said cover being fixed relative to said first and second conductive means;

a set of median arms projecting from said actuator assembly; and

a centering spring surrounding at least a portion of said pedestal segment and compressing said set of median arms away from said carrier.

7. The combination of claim 1 wherein said contactor means is further defined as a single stamped metallic member having a pair of bifurcated leaves projecting from a crotch, said crotch affixed to said carrier, said pair of bifurcated leaves movably and flexibly contacting against said first and second conductive means.

8. An electrical switch comprising an actuator, said actuator including:

a shaft with an occupant accessible button on a first end thereof;

a partially spherical ball joined to said shaft as a single, integral piece;

a pedestal segment longitudinally extending as part of said single, integral piece from said ball opposite from said shaft;

a first set of crossed arms projecting adjacent to said ball and transverse from said pedestal segment as part of said single, integral piece; and

a second set of crossed arms projecting from said actuator in a substantially transverse manner.

9. The electrical switch of claim 8 wherein said actuator further includes:

a return spring disposed within said pedestal segment; and

a longitudinally movable plunger outwardly biased by said return spring.

10. The electrical switch of claim 8 further comprising:

a first contact node;

a second contact node;

a carrier linearly movable relative to said first and second contact nodes;

centering means compressibly contained between said first set of crossed arms and said carrier for centeringly biasing said actuator toward a neutral and unswitched position;

contactor means mounted to said carrier for conducting electric current between said first and second contact nodes;

back and forth movement of said contactor means along a first direction actuable for causing telescoping movement of a steering column; and

back and forth movement of said contactor means along a second direction actuable for causing tilting movement of said steering column.

11. The electrical switch of claim 8 wherein the spherical portion of said partially spherical ball faces away from said second set of crossed arms.

12. An electrical switch comprising;

contactor defined as a single stamped metallic member having a pair of bifurcated leaves flexibly projecting from a crotch;

two sets of switch node pads, each of said sets divided between at least three distinct contact nodes;

a first resistor electrically connected to a first of said contact nodes actuating a steering column tilt up signal;

a second resistor electrically connected to a second of said contact nodes actuating a steering column tilt down signal;

a third resistor electrically connected to a third of said contact nodes actuating a steering column telescopic extension signal; and

a fourth resistor electrically connected to a fourth of said contact nodes actuating a steering column telescopic retraction signal.

13. The electrical switch of claim 12 wherein said bifurcated leaves each have a cup shape near a distal end thereof.

14. The electrical switch of claim 12 further comprising a printed circuit board including:

a pair of switch node pads each divided into at least three distinct whereby there exists at least six distinct contact nodes on said printed circuit board,

said pair of leaves of said contactor selectively movable between said contact nodes of said printed circuit board.

15. In combination, an electrical switch for use in an automotive vehicle and a tilting and telescoping steering column, said electrical switch comprising:

a longitudinally elongated actuator pivotable along a cross-like pattern, at least one substantially transversely oriented surface integrally projecting from a longitudinal portion of said actuator, said actuator further includes a partially spherical ball, a longitudinally elongated shaft extending from said ball, said at least one substantially transversely oriented surface projecting from a median longitudinal portion of said actuator;

a centering spring biasing against said at least one surface of said actuator;

contact nodes;

a carrier linearly movable relative to said contact nodes, said carrier having at least one cradle movably engageable with said actuator;

a pair of leaves of a contactor mounted to said carrier conducting electric current between said contact nodes;

back and forth movement of said contactor along a first direction actuable causing telescoping movement of said steering column;

back and forth movement of said contactor along a second direction actuable causing tilting movement of said steering column;

a first resistor electrically connected to a first of said contact nodes selectively supplying a steering column tilt up signal;

a second resistor electrically connected to a second of said contact nodes selectively supplying a steering column tilt down signal;

a third resistor electrically connected to a third of said contact nodes selectively supplying a steering column telescopic extension signal;

a fourth resistor electrically connected to a fourth of said contact nodes selectively supplying a steering column telescopic retraction signal; and

an occupant accessible button mounted on said actuator for selectively operating said switch.