Patent ID: 7156507

Claim:
A liquid injecting apparatus equipped with a liquid injecting head, which is mounted on a carriage and moved reciprocally in a widthwise direction of a target, and a valve unit, which is mounted on said carriage to be supplied with liquid via a supply passage from a liquid retainer and to supply liquid to said liquid injecting head, said valve unit having: a pressure chamber connected to said liquid retainer via said supply passage; a valve, which opens or closes said supply passage to supply liquid to said pressure chamber; an urging member, which urges said valve in a direction to close said supply passage; and a flexible film member, forming part of an outer wall of said pressure chamber, which is displaced based on a negative pressure generated as liquid in said pressure chamber decreases, and which directly transmits the displacement to said valve to thereby cause said valve to operate against urging force of said urging member; wherein said valve unit further comprises: a supply hole positioned between said supply passage and said pressure chamber; and a spring having an urging force for urging said valve in a direction of closing that supply hole, and said valve opens said supply hole upon reception of displacement of said film member against said urging force of said spring; and wherein said valve has a plate-like member and a rod member formed integral with the plate-like member in such a way as to protrude from the plate-like member, said rod member is inserted in said supply hole, said plate-like member receives the urging force of said spring, and said rod member receives a displacement reaction force by displacement of said film member.