Oven

Abstract

Provided herein is an oven in which a door has a double door structure that includes a first door formed of a transparent material and a second door formed of an opaque material to simultaneously ensure visibility and heat insulation. The oven includes a main body, a cooking compartment provided inside the main body and having an open front surface, a first door rotatably coupled to the main body to open and close the cooking compartment, formed of a transparent material to make an inside of the cooking compartment visible from the outside, and locked to and unlocked from the main body by a locking device, and a second door formed of an opaque material, rotatably coupled to a front surface of the first door, and locked to and unlocked from the first door by the locking device.

What is claimed is: 
     
         1 . An oven comprising:
 a main body;   a cooking compartment provided inside the main body and having an open front surface;   a locking device;   a first door rotatably coupled to the main body to open and close the cooking compartment, formed of a transparent material to make an inside of the cooking compartment visible from an outside thereof, and locked to and unlocked from the main body by the locking device; and   a second door formed of an opaque material, rotatably coupled to a front surface of the first door, and locked to and unlocked from the first door by the locking device.   
     
     
         2 . The oven of  claim 1 , further comprising:
 a handle coupled to a front surface of the second door,   wherein the locking device includes:
 a support coupled to the handle, 
 a rotary lever coupled to the support to be rotatable in a horizontal direction, 
 a lever unit engaged with the rotary lever to rotate in a vertical direction, 
 a bracket having the lever unit rotatably coupled thereto, and 
 a locking member having the lever unit locked and unlocked thereto and therefrom. 
   
     
     
         3 . The oven of  claim 2 , wherein the locking member includes:
 a first locking member provided at the first door, and   a second locking member provided at the main body.   
     
     
         4 . The oven of  claim 3 , wherein the lever unit includes:
 a first lever unit engaged with the rotary lever and locked to and unlocked from the first locking member, and   a second lever unit engaged with the first lever unit and locked to and unlocked from the second locking member.   
     
     
         5 . The oven of  claim 4 , wherein the bracket includes:
 a first bracket coupled to the front surface of the second door and having the first lever unit rotatably coupled thereto, and   a second bracket coupled to the first door and having the second lever unit rotatably coupled thereto.   
     
     
         6 . The oven of  claim 5 , wherein
 the support includes a housing accommodated in and coupled to a rear surface of the handle and a rear cover coupled to an open rear surface of the housing, and   the rotary lever is rotatably coupled to the housing.   
     
     
         7 . The oven of  claim 6 , wherein the rotary lever includes:
 a hinge protrusion rotatably coupled to the housing,   a pressing portion exposed to an outside of the rear cover and configured to rotate in the horizontal direction about the hinge protrusion,   a support portion elastically supported at the housing by a spring, and   a rotation-inducing portion configured to come into contact with the first lever unit, rotate in the horizontal direction about the hinge protrusion, and induce rotation of the first lever unit.   
     
     
         8 . The oven of  claim 7 , wherein the first lever unit is rotatably coupled to the first bracket by a first rotating shaft, and includes:
 a first contact portion configured to come into contact with the rotation-inducing portion and rotate in the vertical direction about the first rotating shaft, and   a first locking portion configured to come into contact with the second lever unit, rotate in the vertical direction about the first rotating shaft, and be locked to and unlocked from the first locking member.   
     
     
         9 . The oven of  claim 8 , wherein the second lever unit is rotatably coupled to the second bracket by a second rotating shaft, and includes:
 a second contact portion configured to come into contact with the first locking portion and rotate in the vertical direction about the second rotating shaft, and   a second locking portion configured to rotate in the vertical direction about the second rotating shaft and be locked to and unlocked from the second locking member.   
     
     
         10 . The oven of  claim 1 , wherein, when the second door is locked to the first door by the locking device and the first door is unlocked from the main body, both the first door and the second door are opened and the cooking compartment is opened. 
     
     
         11 . The oven of  claim 1 , wherein, when the second door is unlocked from the first door by the locking device and the first door is locked to the main body, the first door keeps the cooking compartment closed and only the second door is opened. 
     
     
         12 . The oven of  claim 11 , wherein, when the first door closes the cooking compartment and only the second door is open, heat inside the cooking compartment is prevented from being emitted to the outside by the first door and the inside of the cooking compartment is visible through the first door. 
     
     
         13 . The oven of  claim 1 , wherein the second door has a folding structure which is only partially openable, and, when the second door is locked to the first door by the locking device and the first door is unlocked from the main body, both the first door and the second door are opened and the cooking compartment is opened. 
     
     
         14 . The oven of  claim 1 , wherein the second door has a folding structure which is only partially openable, and, when the second door is unlocked from the first door by the locking device and the first door is locked to the main body, the first door keeps the cooking compartment closed and the second door is only partially opened. 
     
     
         15 . The oven of  claim 14 , wherein, when the first door closes the cooking compartment and the second door is only partially open, heat inside the cooking compartment is prevented from being emitted to the outside by the first door and the inside of the cooking compartment is visible from the outside through a portion of the first door corresponding to an open portion of the second door. 
     
     
         16 . An oven comprising:
 a main body;   a cooking compartment provided inside the main body and having an open front surface;   a locking device;   a first door rotatably coupled to the main body to open and close the cooking compartment, the first door including a transparent portion formed of a transparent material to make an inside of the cooking compartment visible from an outside thereof and an opaque portion formed of an opaque material, and locked to and unlocked from the main body by the locking device; and   a second door formed of an opaque material, rotatably coupled to a front surface of the first door, and locked to and unlocked from the first door by the locking device.   
     
     
         17 . The oven of  claim 16 , wherein the second door has a folding structure which is only partially openable, and, when the second door is locked to the first door by the locking device and the first door is unlocked from the main body, both the first door and the second door are opened and the cooking compartment is opened. 
     
     
         18 . The oven of  claim 16 , wherein the second door has a folding structure in which only a portion corresponding to the transparent portion is openable, and, when the second door is unlocked from the first door by the locking device and the first door is locked to the main body, the first door keeps the cooking compartment closed and only a portion of the second door corresponding to the transparent portion is opened. 
     
     
         19 . The oven of  claim 18 , wherein, when the first door closes the cooking compartment and only the portion of the second door corresponding to the transparent portion is open, heat inside the cooking compartment is prevented from being emitted to the outside by the first door and the inside of the cooking compartment is visible from the outside through the open portion of the second door. 
     
     
         20 . An oven comprising:
 a main body;   a cooking compartment provided inside the main body and having an open front surface;   a first door rotatably coupled to the main body to open and close the cooking compartment, and including a transparent portion formed of a transparent material to make an inside of the cooking compartment visible from an outside thereof and an opaque portion formed of an opaque material; and   a second door formed of an opaque material and rotatably provided at a front surface of the first door to open and close the transparent portion.