Bio-signal skin contact sensor apparatus and method of making skin contact

Abstract

A bio-signal skin contact apparatus comprises a first layer, a second layer with adhesive for a skin contact, and a middle layer that is elastic and located between and in contact with the first layer and the second layer. Each of one or more hole structures comprise a first hole through the first layer, a second hole through the second layer and a third hole through the middle layer. The first, second and third holes of a single hole structure of the at least one hole structure are overlapping. A connector structure is partly within the hole, the connector structure comprising an extension, which extends above the level of the first layer, and a cavity for a sensor within the connector structure. The extension performs a bayonet connection with a counter-connector. The connector structure comprises an aperture through the extension in a level of the middle layer. A compartment is filled with flowable material within the hole structure, the flowable material being in contact with and covered by the first layer. The flowable material flows through the aperture into the cavity for the flowable material to become in contact with both skin and the sensor in response to tightening action of the bayonet connection that causes compression to the bio-signal skin contact apparatus at the connector structure and deformation of the compartment based on elasticity of the middle layer for causing pressure to the flowable material.