Refrigerator

1. A refrigerator comprising:

a main body that includes an inner case having an upper wall, both sidewalls, a rear wall, and a bottom wall, an outer case coupled to an outer side of the inner case, and a heat insulating material foamed between the inner case and the outer case;

a storage chamber that is formed inside the inner case;

an ice-making chamber that is formed so as to be partitioned from the storage chamber, at least a part of the ice-making chamber being formed by the upper wall and the both sidewalls;

an ice-making tray that is disposed inside the ice-making chamber to create ice;

an ice bucket that stores the ice created in the ice-making tray, and is drawn into the ice-making chamber or drawn to the outside of the ice-making chamber, the ice bucket including an ice storage box and a cover unit formed on a front surface of the ice storage box, the cover unit including a latch protrusion protruding upwardly from an upper surface of the cover unit; and

a locking device that locks or unlocks the ice bucket drawn into the ice-making chamber, the locking device being formed separately from the ice bucket and coupled to the upper wall of the inner case above the cover unit, the locking device including a movement member having a latched portion configured to be interfered with by the latch protrusion and an elastic member configured to elastically bias the movement member in a direction in which the latched portion is interfered with by the latch protrusion,

wherein the movement member includes a push unit configured to be pushed in a horizontal direction to release the interference of the latched portion and the latch protrusion by pressurizing the movement member.

2. The refrigerator according to claim 1 , wherein the locking device further comprises:

a housing case having a housing space for housing the movement member and the elastic member and one opened surface; and

a cover coupled to the one opened surface of the housing case so as to cover the one opened surface of the housing case.

3. The refrigerator according to claim 1 , wherein the latch protrusion includes a pressurizing surface for pressurizing the latched portion and a first interference surface interfered with by the latched portion, and

the latched portion includes a pressurized surface pressurized by the pressurizing surface and a second interference surface interfered with by the first interference surface to lock the ice bucket.

4. The refrigerator according to claim 3 , wherein the pressurized surface is formed so as to be inclined so that the movement member is moved in a direction perpendicular to an advancing direction of the ice bucket when the pressurized surface is pressurized by the pressurizing surface.

5. The refrigerator according to claim 1 , further comprising:

an ice-making chamber case that is coupled to an inner side of the inner case so as to form the ice-making chamber and has a front surface edge unit with which the ice bucket is brought into close contact,

wherein a first lower protrusion that protrudes so as to fix a lower portion of the ice bucket is formed in a lower portion of the front surface edge unit, and a second lower protrusion that is interfered with by the first lower protrusion is formed in the lower portion of the ice bucket.

6. The refrigerator according to claim 5 , wherein the ice bucket that is drawn into the ice-making chamber and fixed by the first lower protrusion and the second lower protrusion is lifted up to release the interference between the first lower protrusion and the second lower protrusion, and drawn to the outside of the ice-making chamber.

7. The refrigerator according to claim 5 , wherein the first lower protrusion includes a first latch corner and a first interference surface formed so as to be inclined on an inner side of the first latch corner,

the second lower protrusion includes a second latch corner and a second interference surface formed so as to be inclined on an inner side of the second latch corner, and

the lower portion of the ice bucket is fixed to a lower portion of the ice-making chamber case in such a manner that the first interference surface is interfered with by the second interference surface.

8. The refrigerator according to claim 7 , wherein the first lower protrusion includes a first guide surface that is formed so as to be inclined on an outer side of the first latch corner, and the second lower protrusion includes a second guide surface that is formed so as to be inclined on an outer side of the second latch corner so that the second guide surface is slidably moved on the first guide surface to guide the ice bucket.