Patent ID: 6871943

Claim:
A head unit having a plurality of functional liquid droplet ejection heads for selectively ejecting an introduced functional liquid from ejection nozzles, and a carriage for carrying the plurality of functional liquid droplet ejection heads, wherein a plurality of main cables connected to a head driver and a plurality of main pipes connected to a functional liquid tank are connected to the respective functional liquid droplet ejection heads, the head unit comprising: a wiring connection assembly carried on the carriage and comprising: a plurality of wiring connectors to which the respective main cables are connected; and a plurality of separate cables one end of each being connected to a head board of the respective functional liquid droplet ejection heads and an opposite end of each being connected to the respective wiring connectors; and a piping connection assembly carried on the carriage and comprising: a plurality of piping joints to which the respective main pipes are connected; and a plurality of separate pipes one end of each being connected to a functional liquid introducing port of the respective functional liquid droplet ejection heads and an opposite end of each being connected to the respective piping joints, wherein the plurality of piping joints are disposed in a position free from overlapping in a vertical direction with the plurality of functional liquid droplet ejection heads.