Expanding accessory for mobile electronic devices

1. An accessory for attachment to a portable media player or a portable media player case, the accessory comprising:

a platform adapted to engage a back of the portable media player or the portable media player case;

a button that is movable relative to the platform, the button comprising an inner surface facing the platform, an outer surface opposite the inner surface and facing away from the platform, and an annular wall carried by the inner surface; and

a biasing element arranged between the platform and the button and radially inwardly of an outer surface of the annular wall, the biasing element configured to bias the button relative to the platform.

2. The accessory of claim 1 , wherein the biasing element is configured to push the button away from the platform.

3. The accessory of claim 1 , further comprising a skin coupled to the platform, wherein the skin is movable between a collapsed configuration and an expanded configuration.

4. The accessory of claim 3 , wherein the biasing element is arranged within the skin.

5. The accessory of claim 3 , wherein the biasing element is configured to push the button away from the platform such that the skin occupies the expanded configuration.

6. The accessory of claim 3 , further comprising a vent hole formed in the skin, the vent hole configured to facilitate air flow into and out of the skin as the skin is moved between the collapsed configuration and the expanded configuration.

7. The accessory of claim 3 , wherein the skin comprises an elastomeric material and has an accordion shape.

8. The accessory of claim 3 , wherein the skin comprises a plurality of folding sections.

9. The accessory of claim 1 , wherein the annular wall extends axially inwardly away from the outer surface of the button.

10. The accessory of claim 1 , wherein the biasing element comprises a coil spring.

11. The accessory of claim 1 , further comprising a lock configured to releasably secure the button to the platform.

12. The accessory of claim 1 , further comprising a first projection carried by the button and arranged to engage a second projection carried by the platform to releasably secure the bottom to the platform.

13. The accessory of claim 12 , further comprising a recess defined by the platform or the button, the recess configured to receive the first or second projection to releasably secure the button to the platform.

14. The accessory of claim 1 , wherein the button is movable between a first position, in which the outer surface of the button is disposed approximately adjacent the platform and is a first distance from the platform, and a second position, in which the outer surface of the button is spaced from the platform and is a second distance from the platform, the second distance being greater than the first distance.

15. An accessory for attachment to a portable media player or a portable media player case, the accessory comprising:

a platform adapted to engage a back of the portable media player or the portable media player case;

a button comprising an inner surface facing the platform, an outer surface opposite the inner surface and facing away from the platform, and an annular wall carried by the inner surface; and

a collapsing mechanism arranged between the platform and the button and radially inwardly of an outer surface of the annular wall, the collapsing mechanism configured to facilitate movement of the button, relative to the platform, between a collapsed configuration and an expanded configuration.

16. The accessory of claim 15 , wherein the collapsing mechanism comprises a biasing element configured to urge the button toward the expanded configuration.

17. The accessory of claim 16 , further comprising a skin coupled to the platform, wherein the biasing element is arranged within the skin.

18. The accessory of claim 17 , further comprising a vent hole formed in the skin, the vent hole configured to facilitate air flow into and out of the skin as the button is moved between the collapsed configuration and the expanded configuration.

19. The accessory of claim 17 , wherein the skin comprises an elastomeric material.

20. The accessory of claim 17 , wherein the skin has an accordion shape defined by a plurality of folding sections.

21. The accessory of claim 15 , further comprising a first projection carried by the button and arranged to engage a second projection carried by the platform to releasably secure the bottom to the platform.

22. The accessory of claim 21 , further comprising a recess defined by the platform or the button, the recess configured to receive the first or second projection to releasably secure the button to the platform.

23. The accessory of claim 15 , wherein the button is movable between a first position, in which the outer surface of the button is disposed approximately adjacent the platform and is a first distance from the platform, and a second position, in which the outer surface of the button is spaced from the platform and is a second distance from the platform, the second distance being greater than the first distance.

24. The accessory of claim 15 , wherein the annular wall extends axially inwardly away from the outer surface of the button.

25. An accessory for attachment to a portable media player or a portable media player case, the accessory comprising:

a platform adapted to engage a back of the portable media player or the portable media player case;

a skin coupled to the platform, wherein the skin is deformable between a collapsed configuration and an expanded configuration;

a button coupled to the skin opposite the platform, the button comprising an inner surface facing the platform, an outer surface opposite the inner surface and facing away from the platform, and an annular wall carried by the inner surface; and

means for facilitating movement of the skin between the collapsed configuration and the expanded configuration arranged within the skin and radially inwardly of an outer surface of the annular wall.

26. The accessory of claim 25 , wherein the means for facilitating movement comprises a biasing element configured to push the button away from the platform such that the skin occupies the expanded configuration.

27. The accessory of claim 25 , further comprising a lock configured to releasably secure the skin in the collapsed configuration.

28. The accessory of claim 27 , wherein the lock comprises a first projection carried by the button and arranged to engage a second projection carried by the platform when the lock releasably secures the skin in the collapsed configuration.

29. The accessory of claim 28 , further comprising a recess defined by the platform or the button, the recess configured to receive the first or second projection when the lock releasably secures the skin in the collapsed configuration.

30. A method, comprising:

affixing an accessory to a back of a portable media player or a portable media player case, the accessory comprising a platform engaging the back of the portable media player or the portable media player case, a button that is movable relative to the platform, the button comprising an inner surface facing the platform, an outer surface opposite the inner surface and facing away from the platform, and an annular wall carried by the inner surface, and a biasing element arranged between the platform and the button and radially inwardly of an outer surface of the annular wall, the biasing element configured to bias the button relative to the platform.