Membrane switch

Claim 2

A membrane switch, comprising: first substantially flexible electrical contact means; second substantially flexible electrical contact means; a first layer of dielectric material disposed upon one surface of said first electrical contact means so as to be interposed between said first and second electrical contact means, said first layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern; and a second layer of dielectric material disposed upon one surface of said second electrical contact means so as to be interposed between said first and second electrical contact means and in contact with said first layer of dielectric material disposed upon said one surface of said first electrical contact means, said second layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern which is substantially identical to said geometrical pattern of said cells of said first layer of dielectric material such that said first and second electrical contact means, having said first and second layers of dielectric material disposed thereon, are effectively interchangeable, wherein each one of said cells of said first and second layers of dielectric material has the configuration of a polygon which is defined by means of a predetermined number of vertices, and a predetermined number of sides defining cell walls of said cells which are shared by adjoining cells, said cell walls of said first and second layers of dielectric material being broken in predetermined positions about the perimeter of each cell and being in alignment with respect to each other so that, during and after actuation of said switch, air within any one cell disposed within an actuated area of said switch and between said first and second electrical contact means can vent to one or more adjoining cells, and can receive air back from said one or more adjoining cells, so as to enable activation of said switch and prevent a vacuum from forming between said first and second electrical contact means thereby enabling said switch to break contact after being depressed and released.

Claim 3

The membrane switch as defined in claim 1 wherein said geometric pattern includes a series of hexagons defining a plurality of cells where each of the six sides of the hexagons are broken proximate a midpoint thereof.

Claim 4

The membrane switch as defined in claim 1 wherein said first and second contact means are provided by depositing a conductive layer of material on a respective first and second flexible substrate.

Claim 5

The membrane switch as defined in claim 1 wherein said first and second electrical contact means are secured about their perimeters with an adhesive to environmentally protect the switch contacts by preventing infiltration of the elements therebetween.

Claim 6

The membrane switch as defined in claim 1 wherein a resilient member is provided on an exterior surface of at least one of said first and second contact means to distribute both mechanical and electrical switch loads over more than one cell.

Claim 7

A membrane switch as set forth in claim 1, wherein: said cells have a predetermined size which determines the amount of force necessary to actuate said switch.

Claim 8

An air bag assembly, comprising: housing means having at least one opening defined therethrough; air bag means mounted within said housing means; an outer cover member enclosing said at least one opening defined within said housing means and securing said air bag means therein, said outer cover member being capable of enabling release of said air bag means through said at least one opening defined within said housing means and through said outer cover member when said air bag means is activated; and membrane switch means mounted between said air bag means and said outer cover member and which can be activated by a user through said outer cover member, and enable unimpeded deployment of said air bag means while preventing damage to said air bag means and injury to said user; said membrane switch means including first and second substantially flexible electrical contact means; a first layer of dielectric material disposed upon one surface of said first electrical contact means so as to be interposed between said first and second electrical contact means, said first layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern; and a second layer of dielectric material disposed upon one surface of said second electrical contact means so as to be interposed between said first and second electrical contact means and in contact with said first layer of dielectric material disposed upon said one surface of said first electrical contact means, said second layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern which is substantially identical to said geometrical pattern of said cells of said first layer of dielectric material such that said first and second electrical contact means, having said first and second layers of dielectric material disposed thereon, are effectively interchangeable; wherein each one of said cells of said first and second layers of dielectric material has the configuration of a polygon which is defined by means of a predetermined number of vertices, and a predetermined number of sides defining cell walls of said cells which are shared by adjoining cells, said cell walls of said first and second layers of dielectric material being broken in predetermined positions about the perimeter of each cell and being in alignment with respect to each other so that, during and after actuation of said switch, air within any one cell disposed within an actuated area of said switch and between said first and second electrical contact means can vent to one or more adjoining cells, and can receive air back from said one or more adjoining cells, so as to enable activation of said switch and prevent a vacuum from forming between said first and second electrical contact means thereby enabling said switch to break contact after being depressed and released.

Claim 9

An air bag assembly, comprising: housing means having at least one opening defined therethrough; air bag means mounted within said housing means; an outer cover member enclosing said at least one opening defined within said housing means and securing said air bag means therein, said outer cover member being capable of enabling release of said air bag means through said at least one opening defined within said housing means and through said outer cover member when said air bag means is activated; and membrane switch means mounted between said air bag means and said outer cover member and which can be activated by a user through said outer cover member, and enable unimpeded deployment of said air bag means while preventing damage to said air bag means and injury to said user; said membrane switch means including first and second substantially flexible electrical contact means; a first layer of dielectric material disposed upon one surface of said first electrical contact means so as to be interposed between said first and second electrical contact means, said first layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern; and a second layer of dielectric material disposed upon one surface of said second electrical contact means so as to be interposed between said first and second electrical contact means and in contact with said first layer of dielectric material disposed upon said one surface of said first electrical contact means, said second layer of dielectric material comprising a plurality of contiguous cells arranged in a predetermined geometrical pattern which is substantially identical to said geometrical pattern of said cells of said first layer of dielectric material such that said first and second electrical contact means, having said first and second layers of dielectric material disposed thereon, are effectively interchangeable; wherein each one of said cells of said first and second layers of dielectric material has the configuration of a polygon which is defined by means of a predetermined number of vertices, and a predetermined number of sides defining cell walls of said cells which are shared by adjoining cells, said cell walls of said first and second layers of dielectric material being broken in predetermined positions about the perimeter of each cell and being in alignment with respect to each other so that, during and after actuation of said switch, air within any one cell disposed within an actuated area of said switch and between said first and second electrical contact means can vent to one or more adjoining cells, and can receive air back from said one or more adjoining cells, so as to enable activation of said switch and prevent a vacuum from forming between said first and second electrical contact means thereby enabling said switch to break contact after being depressed and released.

Claim 10

The assembly as defined in claim 7 wherein said geometric pattern includes a series of hexagons defining a plurality of cells where each of the six sides of the hexagons are broken proximate a midpoint thereof.

Claim 11

The assembly as defined in claim 5 wherein said first and second electrical contact means are secured about their perimeters with an adhesive to environmentally protect the switch contacts by preventing infiltration of the elements therebetween.

Claim 12

The assembly as defined in claim 7 wherein said outer cover member is a resilient member which assists in distributing both mechanical and electrical switch loads over more than one cell.

Claim 13

An assembly as set forth in claim 7, wherein: said cells have a predetermined size which determines the amount of force necessary to actuate said membrane switch means.

Claim 14

An assembly as set forth in claim 7, wherein: said housing means comprises a steering wheel housing of a motor vehicle.

Claim 15

An assembly as set forth in claim 12, wherein: said membrane switch means comprises a horn switch of said motor vehicle.