Refrigerator

• US 9,410,732 B2
• Filed: 01/27/2015
• Issued: 08/09/2016
• Est. Priority Date: 02/21/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Kyukwan, Kim, Minsub, Han, Sungkyong
• Primary Examiner(s): WILKENS, JANET MARIE
• Application Number:
  US14/606,384
• Publication Number:
  US 20150241116A1
• Time in Patent Office: 560 Days
• Field of Search: 292194-196, 292/219, 292/220, 292/221, 292/223, 292/227, 312/291, 312/292, 312/404, 312/109, 312/293.2, 312/405.1, 312/321.5, 312/405, 312/326, 312/327, 312/296
• US Class Current: 1/1
• CPC Class Codes: E05B 65/0042 For refrigerators or cold rooms E05B17/0075 takes precedence; magnetic E05C19/16
• CPC Class Codes: E06B 7/16 Sealing arrangements on wings or parts co-operating with the wings specially adapted for fireproof or similar closures E06B5/164; E06B7/098 takes precedence ; fixed sealing joints E04B1/68; devices for fitting sealing strips E04F21/00
• CPC Class Codes: F25D 23/00 General constructional features F25D21/00 takes precedence
• CPC Class Codes: F25D 23/02 Doors; Covers F25D23/08 takes precedence locks or fastenings E05B65/0042
• CPC Class Codes: F25D 23/025 Secondary closures
• CPC Class Codes: F25D 23/028 Details
• CPC Class Codes: F25D 23/04 with special compartments, e.g. butter conditioners
• CPC Class Codes: F25D 25/00 Charging, supporting, and discharging the articles to be cooled

Abstract

A refrigerator includes a cabinet having a storage compartment and a main door mounted on the cabinet by a hinge and having an access opening. An auxiliary storage compartment is provided at a rear portion of the main door and is accessible through the access opening. A sub door is mounted on the main door and opens and closes the access opening. A locking device selectively couples the main door with the sub door, and a handle is pivotably attached on the sub door and can be pushed rearward by pivoting about an end of the handle. A lock control device is mounted in the sub door and unlocks the locking device as a result of the handle being pushed rearward about the end of the handle. The handle has a gripping recess and opens the main door and the sub door simultaneously as a result of being pulled.

Claims

1. A refrigerator comprising:

a cabinet having a storage compartment;

a main door mounted on the cabinet by a hinge and having an access opening;

an auxiliary storage compartment provided at a rear portion of the main door and accessible through the access opening of the main door;

a sub door mounted on the main door and configured to open and close the access opening;

a locking device configured to selectively couple the main door with the sub door, the locking device including;

a catching protrusion provided at a coupling groove formed at the main door, and

a hook member pivotably mounted at the sub door and protruding from a surface of the sub door and configured to selectively engage with the catching protrusion;

a handle pivotably attached on the sub door and configured to be pushed rearward by pivoting about an end of the handle; and

a lock control device mounted in the sub door and configured to unlock the locking device as a result of the handle being pushed rearward about the end of the handle,

wherein the handle has a gripping recess and is configured to horizontally pivot about a vertical pivoting shaft mounted at a lower end of the sub door at the end of the handle, and configured to open the main door and the sub door simultaneously as a result of the handle being pulled.

2. The refrigerator according to claim 1, wherein the handle is configured to manipulate the interlocking device to vertically pivot the hook member to release coupling between the hook member and the catching protrusion as a result of a user pushing the handle to horizontally pivot the handle.

3. The refrigerator according to claim 1, wherein the lock control device comprises:

a push rod configured to convert horizontal pivoting motion of the handle into vertical longitudinal motion and transmit the converted vertical longitudinal motion; and

a pivoting member pivotably mounted together with the hook member and configured to vertically pivot as a result of the vertical longitudinal motion of the push rod.

4. The refrigerator according to claim 3, wherein the handle is provided with a protrusion extending upward and having an inclined upper surface configured to upwardly push an inclined bottom surface of the push rod.

5. The refrigerator according to claim 4, wherein the sub door has a guide groove configured to guide and support motion of the lock control device.

6. The refrigerator according to claim 3, wherein the lock control device further comprises an elastic member configured to restore the pivoting member to a prior position as a result of force applied from the push rod to the pivoting member to pivot the pivoting member being removed.

7. The refrigerator according to claim 1, wherein the handle is configured such that a front of the handle is substantially co-planar with a front of the sub door.

8. The refrigerator according to claim 7, wherein the main door has a step-shaped part that is located at a lower end of the main door and that has a concave shape defining a handle groove opened downward between the step-shaped part and the handle.

9. The refrigerator according to claim 1, further comprising a gasket that is disposed at a rear of the sub door along an edge of the sub door and that is configured to reduce leakage of air as a result of the sub door being coupled to the main door.

10. The refrigerator according to claim 9, wherein the locking device and the lock control device are disposed at an outside of a circumference of the gasket.

11. A refrigerator comprising:

a cabinet having a storage compartment;

a main door mounted on the cabinet by a hinge and having an access opening;

an auxiliary storage compartment provided on the main door and accessible through the access opening of the main door;

a sub door mounted on the main door and configured to open and close the access opening;

a gasket provided along an edge of the sub door and configured to surround the access opening and reduce leakage of air between the sub door and the main door as a result of the sub door being closed;

a locking device provided at an outside of a circumference the gasket of the sub door and configured to selectively couple the main door with the sub door;

a handle attached on the sub door and configured to be pushed rearward to release the sub door from the main door; and

a lock control device mounted in the sub door, disposed at the outside of the gasket, and configured to unlock the locking device and release the sub door from the main door as a result of the handle being pushed rearward,

wherein the handle is configured to open the main door and the sub door simultaneously as a result of the handle being pulled.

12. The refrigerator according to claim 11, wherein the locking device comprises:

a hook member pivotably mounted at the sub door and protruding from a rear of the sub door; and

a catching protrusion provided in a coupling groove formed at a front of the main door and configured to allow a front end of the hook member to be inserted thereinto.

13. The refrigerator according to claim 12, wherein the catching protrusion comprises:

a catching groove formed at a middle portion of a protruding part protruding upward such that the catching groove is engaged with the hook member; and

an inclined surface formed at a front of the catching groove and configured to guide the hook member such that the hook member is pivoted and caught in the catching groove as a result of the hook member being inserted into the coupling groove.

14. The refrigerator according to claim 12, wherein the lock control device comprises:

a push rod configured to convert horizontal pivoting motion of the handle into vertical longitudinal motion as a result of the handle being pushed and to transmit the converted vertical longitudinal motion; and

a pivoting member pivotably mounted together with the hook member and configured to vertically pivot as a result of the vertical longitudinal motion of the push rod.

15. The refrigerator according to claim 14, wherein the lock control device further comprises a guide groove provided in the sub door configured to guide the vertical longitudinal motion of the push rod.

16. The refrigerator according to claim 15, wherein the lock control device further comprises an elastic member configured to restore the pivoting member to a prior position as a result of force applied from the push rod to the pivoting member to pivot the pivoting member being removed.

17. The refrigerator according to claim 11, wherein the handle is configured to horizontally pivot about a vertical pivoting shaft mounted at a lower end of the sub door at the end of the handle, as a result of the handle being pushed rearward.

18. The refrigerator according to claim 11, wherein the handle has a gripping recess and is configured such that a front and a bottom of the handle are substantially co-planar with a front and a bottom of the sub door, respectively, in a restored position of the handle.