| 摘要 |
<p>An input assembly for a human interface device such as a keyboard comprises first and second membranes 20, 22 arranged so that electrical circuits on a surface of each face each other; and a means such as spacer 24 to permit selective electrical connection between the electrical circuits. An electrical connector 42 is connected to the electrical circuit of one or both of the first or second membranes and has a connection portion for connection to a further electrical component such as printed circuit board (PCB) 50. A sealing means is provided which is configured to seal the membrane assembly to a further surface such as support member 60 to form a sealed unit which seals and encapsulates both the electrical circuits of the membrane assembly and the connection portion of the electrical connector 42. The sealing means can comprise a sealing perimeter 68 that surrounds and encapsulates both the connector and the further electrical component which can be received in a recess 62 of support member 60, allowing the membranes to lie flush with the support member. A connection portion of the connector can be integral with the circuit of a lower membrane 22 and extend downwards to connect to the PCB. Upper membrane 20 can extend past the edge of lower member 22 and spacer 45 and have a peripheral edge 30 extending around its periphery defining a sealing surface.</p> |
