EMI shield apparatus and electronic device with same

1. An electronic device comprising:

a chassis defining an input or output (I/O) aperture therein; and

an electromagnetic interference (EMI) shield apparatus mounted to the chassis to cover or uncover the I/O aperture as desired, wherein the EMI shield apparatus comprises:

a hollow shell comprising a sidewall defining a slot therein;

a hub rotatably mounted within the shell; and

a shield member wrapped around the hub, a distal end of the shield member extending out of the shell through the slot, wherein the shield member is further extendable out of the shell by pulling so that the shield member covers the I/O aperture, the shield member is retractable back into the shell from a position where the shield member covers the I/O aperture to uncover the I/O aperture, and the shield member made of EMI shield material.

2. The electronic device of claim 1 , wherein a hook protrudes from the chassis below the I/O aperture, the shield member further comprises a latching portion extending from a distal end to engage with the hook in response to the shield member covering the I/O aperture.

3. The electronic device of claim 1 , wherein the shell is substantially column-shaped, and comprises an annular sidewall and an end wall connected to a first end of the sidewall.

4. The electronic device of claim 3 , wherein the slot is defined in the sidewall, along an axial direction of the shell.

5. The electronic device of claim 3 , wherein a first holder extends from a center of an inner side of the end wall, and the first holder axially defines a first pin hole, wherein the hub comprises a main body, a first pin extends from a center of a first side of the main body, and the first pin is rotatably engaged in the first pin hole of the shell.

6. The electronic device of claim 5 , wherein the hub further comprising a cover opposite to the main body, and a partition plate, wherein the cover comprises a second holder extending from a center of an inner side of the cover facing the main body, the second holder axially defines a second pin hole, wherein the partition plate comprises a second pin that extends from a center of the partition plate opposite to the main body, the second pin is rotatably engaged in the second pin hole.

7. The electronic device of claim 6 , wherein the hub further comprises a shaft connected between centers of the main body and the partition plate.

8. The electronic device of claim 7 , further comprising a resilient member connected between the cover and the partition plate to bias the hub to rotate to warp the shield member, wherein a holding hole is defined in the sidewall of the second pin, a fixing portion is formed on the inner side of the cover; wherein the resilient member comprise a first end fixed to the fixing portion, and a second end inserted into the holding hole.

9. The electronic device of claim 8 , wherein the resilient member is a flat spiral spring.