A combined roller and push switch assembly includes a substantially hollow wheel-like
roller member being displaceable from an initial position to a displaced position.
The combined roller and push switch assembly further includes a member for returning
the roller member from the displaced position to the initial position, the returning
member is a resilient member being at least partly encircled by the roller member,
and a coding member for detecting rotation of the roller member in relation to
an associated frame. In particular, the combined roller and push switch assembly
further including a switch for indicating when the roller member is in the displaced
position, the switch being at least partly encircled by the roller member.