Electric shock prevention apparatus for use with a component...

Details Electric shock prevention apparatus for use with a component... Electric shock prevention apparatus for use with a component...

H - Electricity

05

K

H05K 7/00 (2006.01) G01J 1/02 (2006.01) G08B 13/19 (2006.01) H02H 9/02 (2006.01)

Patent

CA 2280619

A finger guard for use with an electronic device is provided for restricting physical access to a component of the electronic device having an uninsulated surface adapted to carry a voltage. The apparatus includes a housing which defines a first opening, and which is adapted to mount to the electronic device so that the first opening permits passage of passive infrared energy and ambient light to the component. The apparatus further includes a projection arrangement, extending from the housing, which limits physical access to the surface of the component through the first opening, and defining a second opening through which the infrared energy can enter and pass through the first opening to the component. An electronic circuit can also be provided which limits current being provided to an uninsulated component, such as an infrared or ambient light detector of the electronic device, from a circuit of the electronic device. The apparatus includes a resistive element which couples a terminal of the uninsulated component to ground, and a capacitive element which also couples the terminal of the uninsulated component to ground. The resistive and capacitive elements have resistance and capacitance values, respectively, which limit the current to less than about 500µA.

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