US Patent 7887336 Double-sided connector with protrusions

A double-sided connector is provided including: an insulating member having an insulating substrate and an elastomer insert-molded on both faces of the insulating substrate, and a through-hole formed along a thickness direction of the insulating substrate and the elastomer; a conductive member formed on an inner face of the through-hole, both ends of the conductive member exposed at the both faces; and a contact terminal part provided at one end of the conductive member. A protrusion is formed on at least a first face of the two faces of the insulating member and near one of the two ends of the through-hole. The protrusion formed by a part of the elastomer protruding from the first face enables an approximately hemispherical point of contact part connected to the sloping part and covering the top.