Patent ID: 8353179

Claim:
A refrigerator, comprising: a main body having a freezing compartment and a refrigerating compartment formed therein; freezing and refrigerating compartment doors coupled to the main body to respectively open and close the freezing and refrigerating compartments; an ice making unit installed in the freezing compartment; a water supply unit including a housing detachably coupled to the refrigerating compartment, a water tank detachably coupled to the housing, and a pump detachably coupled to the water tank to pump water stored in the water tank; a water supply passage unit arranged at an outer side of the main body and connected to the water supply unit and the ice making unit to supply water pumped by the water supply unit to the ice making unit; a cam type catching unit provided on one of the housing or the water tank; and a locking unit provided on the other of the housing or the water tank to engage the catching unit and couple the water tank to the housing, wherein the locking unit is configured to engage a first portion of the catching unit after being pushed by a second portion of the catching unit and returned to an initial position when the water tank is coupled to the housing, wherein the locking unit comprises: a rotatable disk; and a catching projection protruding from the disk, wherein the catching projection engages the first portion of the catching unit after being pressed by the second portion of the catching unit and restored to the initial position, wherein the water tank is slidably inserted into the housing in a first direction and the catching unit is arranged on the one of the housing or the water tank so as to extend in a second direction that is perpendicular to the first direction, and wherein the first portion of the catching unit smoothly transitions into the second portion of the catching unit, and the first and second portions of the catching unit are substantially symmetrical to each other.