You are correct in your thinking


http://www.amazon.com/TP-LINK-TL-SG1008D-1000Mbps-Switching-Capacity/dp/B001EVGIYG/ref=sr_1_2?ie=UTF8&qid=1385547379&sr=8-2&keywords=8port+network+switch

The above device should allow you to connect up to 7 devices to your router (using the 8th port to connect the switch to your router)

Regards

Geraint