Question on OSI model

as far as i know, two computer connect to each other like this:
Computer A<----->Switch<---->Router<---->Router<---->Router<---->Switch<----> Computer B

But based on OSI model, the sending side passes data from Layer 7 down to Layer 1, so isn’t the layer 1 device should tranfer the data, and not the router ( which is in layer 3 )
Or am i misunderstanding something ? Can someone give me a basic explanation