Refrigerator

1 . A refrigerator comprising:

a main body having a storage compartment;

an inner door having an opening, and being rotatable between a closed position and an open position relative to the storage compartment;

an outer door in front of the inner door, and being rotatable to open and close the opening in the inner door;

a locking device on the outer door to lock the outer door to, and unlock the outer door from, the inner door; and

an input unit to receive a user input from a user to unlock the outer door from the inner door,

the locking device including:

a latch that is rotatable about a latch rotation axis between a locked position in which the outer door is locked to the inner door, and an unlocked position in which the outer door is unlocked from the inner door,

a lever configured to be manually manipulatable by the user such that, as the user applies a manipulation force to the lever, the latch rotates from the locked position to the unlocked position,

a driving source configured to, based on the user input being received by the input unit, generate a driving force,

a pusher that is linearly movable along the latch rotation axis by the generated driving force, and

a connector that is linearly movable between a base position and an advanced position by a linear movement of the pusher,

wherein the connector is configured such that, as the connector moves from the base position to the advanced position, the connector presses the latch, such that the latch rotates from the locked position to the unlocked position.

2 . The refrigerator according to claim 1 , wherein

the inner door includes a fixer,

the latch includes a latch body part, and a latch hook part protruding from the latch body part such that the latch body part and the latch hook part rotate together about the latch rotation axis with rotation of the latch, and

the fixer and the latch hook part are configured such that, in the locked position, the latch hook part is coupled to the fixer, and in the unlocked position, the latch hook part is separated from the fixer.

3 . The refrigerator according to claim 2 , wherein

the locking device includes a latch elastic member configured to elastically bias the latch to the locked position.

4 . The refrigerator according to claim 2 , wherein

the driving force is applied to an end of the latch body part, and

the manipulation force is applied to another end of the latch body part.

5 . The refrigerator according to claim 1 , wherein

the latch includes an inclined surface,

the connector includes a connector protrusion configured to press the inclined surface, and

the inclined surface is inclined with respect to a pressing direction of the connector protrusion such that, as the connector protrusion presses the inclined surface, the latch rotates from the locked position to the unlocked position.

6 . The refrigerator according to claim 1 , wherein the latch is rotatable from the locked position to the unlocked position without interfering with the connector when the connector is in the base position.

7 . The refrigerator according to claim 5 , wherein

the latch includes an avoidance portion, and

the avoidance portion is configured such that, with the connector in the base position, the latch does not interfere with the connector protrusion as the latch is rotated from the locked position to the unlocked position by the manipulation force.

8 . The refrigerator according to claim 1 , wherein

the pusher and the connector are separable, and

the locking device further includes a connector elastic member configured to elastically bias the connector to the base position.

9 . The refrigerator according to claim 1 , wherein

the pusher and the connector are integral.

10 . The refrigerator according to claim 1 , wherein

the driving source includes a motor configured to generate a rotational force,

the locking device further includes a rotation gear rotatable by the generated rotational force, and

the pusher includes a rack gear engaged with the rotation gear, and

the rotation gear and the rack gear are configured such that, as the generated rotational force rotates the rotation gear, the rack gear linearly moves in an axial direction of the latch rotation axis, and thereby linearly moves the pusher.

11 . The refrigerator according to claim 1 , wherein

the driving source includes a solenoid having a plunger configured to be linearly movable by a magnetic force generated by a coil and such that a linear movement of the plunger applies the driving force to the latch.

12 . The refrigerator according to claim 1 , wherein

the locking device further includes a connecting rod between the lever and the latch to transmit the manipulation force from the lever to the latch, and

the connecting rod is rotatable together with the latch about the latch rotation axis.

13 . The refrigerator according to claim 12 , wherein

the connecting rod includes:

a rod body part,

a rod extension part extending in a radial direction from the rod body part, and

a connecting pin at a position eccentric from the latch rotation axis and coupled to the lever such that, as the user applies the manipulation force to the lever, the connecting pin moves and thereby applies the manipulation force to the latch.

14 . The refrigerator according to claim 13 , wherein

the lever is rotatable about a lever rotation axis perpendicular to the latch rotation axis, and

the lever includes:

a lever shaft,

a lever handle protruding from the lever shaft and configured to be manually manipulated by the user such that the lever shaft and the lever handle rotate together about the lever rotation axis with rotation of the lever handle, and

a pin coupling part coupled to the connecting pin and configured such that, as the user applies the manipulation force to the lever, the pin coupling part moves the connecting pin and thereby applies the manipulation force to the latch.