Coupling structures for electronic device housings

1. A tablet computer comprising:

a front cover defining a front exterior surface of the tablet computer; and

a housing coupled to the front cover and comprising:

a first metal housing component defining:

a first portion of a back exterior surface of the housing;

a portion of a first side exterior surface of the housing;

a portion of a second side exterior surface of the housing; and

a second metal housing component defining a corner portion of the housing, the corner portion extending from the first side exterior surface of the housing to a third side exterior surface of the housing; and

a polymer joint structure positioned in a gap between the first metal housing component and the second metal housing component and defining a second portion of the back exterior surface of the housing.

2. The tablet computer of claim 1 , wherein:

the corner portion is a first corner portion;

the polymer joint structure is a first polymer joint structure;

the gap is a first gap; and

the housing further comprises:

a third metal housing component defining a second corner portion of the housing; and

a second polymer joint structure in second gap between the first metal housing component and the third metal housing component and defining a third portion of the back exterior surface of the housing.

3. The tablet computer of claim 2 , further comprising wireless communication circuitry positioned within the housing and electrically coupled to the second metal housing component, wherein the second metal housing component operates as an antenna for the wireless communication circuitry.

4. The tablet computer of claim 3 , wherein:

the antenna is a first antenna;

the wireless communication circuitry is coupled to the third metal housing component; and

the third metal housing component operates as a second antenna for the wireless communication circuitry.

5. The tablet computer of claim 1 , wherein:

the first metal housing component defines a first interlock feature;

the second metal housing component defines a second interlock feature; and

the polymer joint structure engages the first interlock feature and the second interlock feature.

6. The tablet computer of claim 1 , wherein:

the portion of the first side exterior surface of the housing is a first portion of the first side exterior surface of the housing; and

the polymer joint structure further defines a second portion of the first side exterior surface of the housing.

7. The tablet computer of claim 6 , wherein the second metal housing component defines a third portion of the first side exterior surface of the housing.

8. An electronic device comprising:

a transparent cover defining a front exterior surface of the electronic device; and

a housing coupled to the transparent cover and defining a back surface of the electronic device and a side surface of the electronic device, the side surface positioned between the transparent cover and the back surface of the electronic device, the housing comprising:

a first metal housing component defining at least a portion of the back surface of the electronic device and a first portion of the side surface of the electronic device;

a second metal housing component defining a second portion of the side surface of the electronic device;

a third metal housing component defining a third portion of the side surface of the electronic device;

a first polymer material positioned within a first gap between the first metal housing component and the second metal housing component and defining a fourth portion of the side surface of the electronic device; and

a second polymer material positioned within a second gap between the first metal housing component and the third metal housing component and defining a fifth portion of the side surface of the electronic device.

9. The electronic device of claim 8 , further comprising wireless communication circuitry within the housing and conductively coupled to at least one of the second metal housing component or the third metal housing component.

10. The electronic device of claim 9 , wherein the at least one of the second metal housing component or the third metal housing component that is conductively coupled to the wireless communication circuitry operates as an antenna for the electronic device.

11. The electronic device of claim 8 , wherein:

the second metal housing component defines a first corner portion of the housing; and

the third metal housing component defines a second corner portion of the housing.

12. The electronic device of claim 8 , wherein the first polymer material retains the first metal housing component to the second metal housing component.

13. The electronic device of claim 8 , wherein:

the side surface of the electronic device is a first side surface of the electronic device; and

the first metal housing component further defines a portion of a second side surface of the electronic device, the second side surface opposite the first side surface.

14. The electronic device of claim 13 , wherein:

the portion of the back surface of the electronic device is a first portion of the back surface of the electronic device; and

the first polymer material defines a second portion of the back surface of the electronic device; and

the second polymer material defines a third portion of the back surface of the electronic device.

15. A portable electronic device comprising:

a housing comprising:

a unitary metal housing component defining:

at least a portion of a back surface of the housing;

at least a portion of a first side surface of the housing; and

at least a portion of a second side surface of the housing;

an antenna component defining a corner portion of the housing extending between the first side surface of the housing and a third side surface of the housing; and

a molded polymer structure positioned in a gap between the unitary metal housing component and the antenna component and configured to electrically isolate the antenna component from the unitary metal housing component; and

a front cover coupled to the housing and defining a front surface of the portable electronic device.

16. The portable electronic device of claim 15 , wherein:

the antenna component is first antenna component;

the corner portion is a first corner portion; and

the housing further comprises a second antenna component defining a second corner portion of the housing extending between the first side surface of the housing and a fourth side surface of the housing.

17. The portable electronic device of claim 16 , wherein:

the molded polymer structure is a first molded polymer structure;

the gap is a first gap; and

the housing further comprises a second molded polymer structure positioned in a second gap between the unitary metal housing component and the second antenna component and configured to electrically isolate the second antenna component from the unitary metal housing component.

18. The portable electronic device of claim 15 , wherein:

the portion of the back surface of the housing is a first portion of the back surface of the housing; and

the molded polymer structure comprises:

a first segment defining a second portion of the back surface of the housing; and

a second segment defining a third portion of the back surface of the housing.

19. The portable electronic device of claim 18 , wherein:

the portion of the first side surface of the housing is a first portion of the first side surface of the housing; and

the molded polymer structure further comprises a third segment defining a second portion of the first side surface of the housing.

20. The portable electronic device of claim 15 , wherein:

the unitary metal housing component defines a first interlock feature;

the antenna component defines a second interlock feature; and

the molded polymer structure engages the first interlock feature and the second interlock feature.