Patent ID: 7909999

Claim:
A filter assembly comprising: a filter cartridge including a housing, a filter provided inside the housing, and a cartridge connection portion provided at an upper portion of the housing; a head portion including a head connection portion to be coupled to the cartridge connection portion so that the filter cartridge is attached thereto and detached therefrom, a water inlet which introduces water to the filter cartridge, and a water outlet which discharges the water filtered by the filter cartridge; wherein the head portion includes a filter attaching and detaching lever which is movable between a first position, at which the head connection portion and the filter cartridge are coupled to each other, and a second position, at which the head connection portion and the filter cartridge are separated from each other, and is supported by the head portion; wherein the filter attaching and detaching lever includes a lever body and a lever spring inserted between an inner surface of the lever body of the filter attaching and detaching lever and an outer surface of the head connection portion; and wherein the head connection portion includes: a connection portion body including an outer surface on which the lever spring is installed; a pushing member inserted into a pushing member receiving portion formed around an inner surface of the connection portion body; and a pushing spring inserted into the pushing member receiving portion and putting elastic force on the pushing member in a single direction.