Mobile terminal

1. A mobile terminal, comprising:

a display;

a frame configured to support a back of the display;

a first antenna to be provided to at least one side of a top portion and a bottom portion of the frame;

a rear case to attach to a back of the frame;

a second antenna provided at both of an inner side of the rear case and an outer side of the rear case, the second antenna comprising:

an outer lateral surface part provided on the outer side of the rear case,

an inner lateral part provided on the inner side of the rear case, and

a bent part that connects the outer lateral surface part and the inner lateral part;

a third antenna configured in a beam shape to be attached to at least one of a right lateral side and a left lateral side of the frame, the third antenna including a fixing part projected by extending from an inner lateral surface of the third antenna; and

an extension part, provided at the first antenna, electrically connected to the fixing part of the third antenna,

wherein the third antenna is electrically connected to the bent part of the second antenna,

wherein the third antenna includes a metal material, and

wherein a portion of the third antenna is exposed to an exterior of the mobile terminal so as to form right and left lateral exterior surfaces of the mobile terminal.

2. The mobile terminal of claim 1 ,

wherein the rear case includes a hole to enable the bent part of the second antenna to pass through.

3. The mobile terminal of claim 1 , further comprising:

a lock hole in a corresponding region of each of the fixing part and the extension part; and

a screw to attach to the lock hole.

4. The mobile terminal of claim 1 , further comprising a connecting pin provided between the frame and the rear case, wherein a first end portion of the connecting pin contacts an inner lateral side of the third antenna, and wherein a second end portion of the connecting pin contacts the second antenna.

5. The mobile terminal of claim 4 , wherein the connecting pin includes a metal wire having a bent terminal corresponding to each of the first end portion and the second end portion of the connecting pin.

6. The mobile terminal of claim 5 , wherein the connecting pin includes a mold part configured to form an exterior frame of the connecting pin by double injection molding performed on the metal wire, and wherein the frame includes a recess part configured to enable the mold part of the connecting pin seated thereon.

7. The mobile terminal of claim 1 , further comprising:

a main board provided between the frame and the rear case; and

a ground pin provided between the front case and the main board,

wherein a first end portion of the ground pin contacts an inner lateral side of the third antenna, and wherein a second end portion of the ground pin contacts a rear surface of the main board.

8. The mobile terminal of claim 1 , further comprising:

at least one slide lock hole configured to decrease in width by being provided to an inner lateral side of the third antenna; and

a projected hook part configured to couple to the third antenna by being provided to a region of a lateral surface of the frame corresponding to the at least one slide lock hole.

9. The mobile terminal of claim 8 , wherein the slide lock hole is attached to the inner lateral side of the third antenna by soldering.

10. A mobile terminal, comprising:

a frame to support a display, the frame having a first portion, a second portion and a back portion;

a first antenna at the first portion of the frame;

a rear case at the back portion of the frame, the rear case having an inner side and an outer side;

a second antenna provided at both of an inner side of the rear case and an outer side of the rear case, the second antenna comprising:

an outer lateral surface part provided on the outer side of the rear case;

an inner lateral part provided on the inner side of the rear case; and

a bent part that connects the outer lateral surface part and the inner lateral part;

a third antenna to attach to at least one lateral side of the frame, the third antenna including a fixing part projected by extending from an inner lateral surface of the third antenna; and

an extension part, provided at the first antenna, electrically connected to the fixing part,

wherein the third antenna is electrically connected to the bent part of the second antenna,

wherein the third antenna includes a metal material, and

wherein a portion of the third antenna is exposed to an exterior of the mobile terminal so as to form right and left lateral exterior surfaces of the mobile terminal.

11. The mobile terminal of claim 10 ,

wherein the rear case includes a hole to receive the bent part of the second antenna.

12. The mobile terminal of claim 10 , further comprising:

a lock hole in a corresponding region of each of the fixing part and the extension part; and

a screw to be received at the lock hole.

13. The mobile terminal of claim 10 , further comprising a connecting pin between the frame and the rear case, wherein a first end portion of the connecting pin contacts an inner lateral side of the third antenna, and wherein a second end portion of the connecting pin contacts the second antenna.

14. The mobile terminal of claim 13 , wherein the connecting pin includes a metal wire having a bent terminal corresponding to each of the first end portion and the second end portion of the connecting pin.

15. The mobile terminal of claim 14 , wherein the connecting pin includes a mold part to form an exterior frame of the connecting pin by double injection molding performed on the metal wire, and wherein the frame includes a recess part configured to enable the mold part of the connecting pin seated thereon.

16. The mobile terminal of claim 10 , further comprising:

a main board between the frame and the rear case; and

a ground pin between the front case and the main board,

wherein a first end portion of the ground pin contacts an inner lateral side of the third antenna, and wherein a second end portion of the ground pin contacts a rear surface of the main board.

17. The mobile terminal of claim 10 , further comprising:

at least one slide lock hole that decreases in width by being provided to an inner lateral side of the third antenna; and

a projected hook part to couple to the third antenna by being provided to a region of a lateral surface of the frame corresponding to the at least one slide lock hole.

18. The mobile terminal of claim 17 , wherein the slide lock hole is coupled to the inner lateral side of the third antenna by soldering.