INVISIBLE, CONTACTLESS SWITCH DEVICE
First Claim
1. A switching device adapted to be installed behind an opaque wall (32) so as not to be visible from the outside of said wall and intended to switch at least one electrical device (44) on and comprising at least a first module (10) connected by a communication means (14) to a second module (12) adapted to make the connection between said electrical device and a power source, said first module comprising a capacitive sensor (16) adapted to change its capacitance value when the hand (34) or any other part of the body of a user on the outside is placed near the wall where said device is installed,said device being characterised in that the capacitive sensor, which is located on a printed circuit type board comprises a capacitor Cx having a first metal electrode (48) consisting of a solid circle and a second metal electrode (50) surrounding said first electrode and being concentric with it, both electrodes being included in a metal frame (51), whose function is to define the capacitive field resulting from the capacitor formed by the two electrodes in the plane of the board and to maximise this field perpendicular to the plane of the board.
2 Assignments
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Accused Products
Abstract
A switching device adapted to be installed behind an opaque wall (32) so as not to be visible from the outside of the wall and intended to switch at least one electrical device (44) on. This switching device includes a first module (10) and a second module (12) adapted to make the connection between the device and a power source. The first module includes a capacitive sensor (16) having a capacitor on a printed circuit board adapted to change its capacitance value when the hand (34) of a user on the outside is placed near the wall where the device is installed. The capacitor is included in a metal frame whose function is to define the capacitive field due to the capacitor in the plane of the board and to maximize this field perpendicular to the plane of the board.
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Citations
11 Claims
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1. A switching device adapted to be installed behind an opaque wall (32) so as not to be visible from the outside of said wall and intended to switch at least one electrical device (44) on and comprising at least a first module (10) connected by a communication means (14) to a second module (12) adapted to make the connection between said electrical device and a power source, said first module comprising a capacitive sensor (16) adapted to change its capacitance value when the hand (34) or any other part of the body of a user on the outside is placed near the wall where said device is installed,
said device being characterised in that the capacitive sensor, which is located on a printed circuit type board comprises a capacitor Cx having a first metal electrode (48) consisting of a solid circle and a second metal electrode (50) surrounding said first electrode and being concentric with it, both electrodes being included in a metal frame (51), whose function is to define the capacitive field resulting from the capacitor formed by the two electrodes in the plane of the board and to maximise this field perpendicular to the plane of the board.
Specification