Microwave oven

1. A microwave oven comprising:

a cabinet defining a cooking chamber therein; and

a door coupled to the cabinet to open and close the cooking chamber, the door comprising:

a door frame to form an appearance of the door,

a shielding plate installed in the door frame to prevent high-frequency electromagnetic waves from radiating from a small gap between the door and the cabinet,

a choke member provided at a peripheral edge of the shielding plate and having a high-frequency choke groove,

a cover to cover the high-frequency choke groove, and

a retaining member provided at the cover to elastically support the choke member,

wherein the cover includes an inner rib section extended into the high-frequency groove and an outer rib section extended between the door frame and the choke member, and the retaining member is disposed between an end of the choke member near an opening of the high-frequency choke groove and the inner rib section of the cover.

2. The microwave oven as set forth in claim 1 , wherein the retaining member is provided along the inner rib section of the cover.

3. The microwave oven as set forth in claim 1 , wherein the end of the choke member is extended into the high-frequency choke groove, and the retaining member includes an extension section that is extended toward the end of the choke member from the inner rib section of the cover and a support section that is extended from an end of the extension section while being parallel to the end of the extension section, to support the end of the choke member.

4. The microwave oven as set forth in claim 3 , wherein the retaining member further includes an inclined section extended from an end of the support section while being inclined toward the inner rib section of the cover, to guide the retaining member into the high-frequency choke groove, wherein an end of the inclined section is spaced apart from the inner rib section of the cover by a predetermined distance.

5. The microwave oven as set forth in claim 4 , wherein the retaining member further includes a contact section provided at an end of the inclined section, which comes into contact with the inner rib section of the cover when the retaining member is elastically deformed, to allow the retaining member to be deformed within a certain deformation range.

6. A door having a door frame attached thereto that is hingedly attached to a chamber to provide an access to a cavity and to confine a source of energy to within the cavity, wherein the door comprises:

a shielding plate attached to an inner surface of the door frame to prevent the energy from emitting outside of the door, wherein the shielding plate is inwardly bent at the edges thereof to form a choke member having a high-frequency choke groove to cancel out energy emissions; and

a cover that is attached to an inner surface of the door frame and located between the shielding plate and the front of the cavity to prevent a substance from entering into the high-frequency choke groove; wherein the cover includes:

a retaining member to reduce deformation of the choke member when an external force is applied to the choke member,

wherein the cover further includes an inner rib section extending into the high-frequency choke groove, an outer rib section extending between the door frame and the choke member, and a connecting section to connect the inner rib section and the outer rib section to each other to prevent a substance from entering into the high-frequency choke groove.

7. The door as claimed in claim 6 , wherein the cover includes at least one hook and the choke member includes at least one hook hole into which the at least one hook is attached in order to hold the cover in the shielding plate, thereby covering the high-frequency groove.

8. The door as claimed in claim 6 , wherein the retaining member is integrally formed with the cover.

9. The door as claimed in claim 6 , wherein the retaining member is an elastically deformable material in order to allow for the cover to be fitted into the choke member.

10. The door as claimed in claim 8 , wherein the retaining member is in an elastically deformed position when the retaining member is inserted into the high-frequency choke groove, and the retaining member is restored to an original position after the retaining member is inserted into the high-frequency choke groove.

11. The door as claimed in claim 9 , wherein the retaining member is located between an inner rib section of the cover and an end of the choke member in order to support the inner rib section of the cover and the end of the choke member.

12. The door as claimed in claim 11 , wherein the retaining member provides support to the end of the choke member while in contact with the end of the choke member, thereby reducing deformation of the choke member.

13. The door as claimed in claim 12 , wherein the retaining member includes an extension section to support the end of the choke member, wherein the extension section extends into a center area of the high-frequency groove toward the end of the choke member.

14. The door as claimed in claim 13 , wherein the retaining member further includes a support section that is extended from an end of the extension section to support the end of the choke member, wherein the support section is substantially parallel to the end of the choke member.

15. The door as claimed in claim 14 , wherein the retaining member further includes an inclined section that is extended from an end of the support section and forms an incline towards an inner side of the cover.

16. The door as claimed in claim 15 , wherein the inclined section moves along the end of the choke member when the retaining member is inserted into the high-frequency choke groove in order to allow the cover to be fitted into the choke member.

17. The door as claimed in claim 15 , wherein the retaining member further includes a contact section attached to the end of the inclined section to come into contact with the inner side of the cover when the retaining member is elastically deformed to prevent the retaining member from being plastically deformed.

18. A microwave oven door having a door frame attached thereto that is hingedly attached to a chamber to provide an access to the microwave oven, wherein the microwave oven door comprises:

a choke member having a high-frequency choke groove to cancel out energy emissions; and

a cover that is attached to an inner surface of the door frame and includes a retaining member to prevent deformation of the choke member when an external force is applied to the choke member, wherein when the cover is installed with the choke member, an end of the choke member is supported on an inner rib section of the cover via the retaining member.