Vehicular switch

Details Vehicular switch Vehicular switch

2005-02-15

2005-02-15

Friedhofer, Michael A. (Department: 2832)

Electricity: circuit makers and breakers

Special application

Steering wheel, shaft or column mounted

C200S0110DA, C200S0110DA, C200S336000

Reexamination Certificate

active

06855896

ABSTRACT:
In a vehicular lever switch having a resistor at a fixed contact plate to be combined with a pivoting knob, when a passenger charged with static electricity touches the lever, the resistor is to be prevented from being damaged. A fixed contact plate is arranged with a resistor and conductors and extended from both ends thereof in a ring-like shape to constitute a fixed contact. Further, an extended portion extended in a circular arc shape is formed on an outer side of the resistor with a gap from the conductor. Even when the hand of a passenger charged with static electricity touches a vicinity of a pivoting knob and the static electricity is applied to the fixed contact plate, the static electricity flows to the extended portion and is discharged via the conductor and a terminal. Thereby, the resistor is not damaged by static electricity. Further, it is not necessary to ensure a distance from an end edge of the pivoting knob to the fixed contact plate to be long in order to avoid propagation of static electricity and therefore, a degree of freedom of a shape of the lever can be enhanced.

REFERENCES:
patent: 5107243 (1992-04-01), Maeda
patent: 5546087 (1996-08-01), Martin Neira
patent: 5854458 (1998-12-01), Ramamurthy et al.
patent: 6365852 (2002-04-01), Leng et al.
patent: 6441327 (2002-08-01), Shibata et al.
patent: 6534733 (2003-03-01), Schwartz et al.

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