Input structure and portable electronic device using the same

1. An input structure applied in a portable electronic device, the input structure comprising:

a main body detachably fitted to the portable electronic device, wherein the main body is substantially annular-shaped and comprises at least one flexible portion and two opposite accommodation portions connected to at least one flexible portion to define a cavity, the at least one flexible portion allow the portable electronic device to be received in the cavity with the at least one flexible portion and the accommodation portions tightly sleeved around the portable electronic device; and a diameter of the cavity can be adjusted to suit other portable electronic devices by drawing the flexible portion; and

an electric assembly comprising:

a sensing module configured to trigger electric signals to a communication module through the flexible portion; and

the communication module configured to send the electric signals to the portable electronic device.

2. The input structure as claimed in claim 1 , wherein the two accommodation portions comprise a first accommodation portion, the first accommodation portion forms an operating surface, and a plurality of icons are printed on operating surface to indicate auxiliary functions of the portable electronic device.

3. The input structure as claimed in claim 2 , wherein the sensing module is received in the first accommodation portion and is associated with the plurality of icons.

4. The input structure as claimed in claim 3 , wherein the sensing module comprises a plurality of sensors corresponding to the plurality of icons, respectively, the plurality of sensors are electronically connected to the communication module to trigger the electric signals to the communication module.

5. The input structure as claimed in claim 1 , wherein the two accommodation portions comprise a second accommodation portion, the electric assembly further comprises a power supply, both the communication module and the power supply are received in the second accommodation portion.

6. The input structure as claimed in claim 1 , wherein the electric assembly further comprises a plurality of conductive wires to electronically connected to the sensing module and the communication module, and a part of the plurality of conductive wires are arranged in the flexible portions in a spiral, meander, or other geometrical configuration.

7. The input structure as claimed in claim 6 , wherein each flexible portion is made of elastic materials.

8. A portable electronic device comprising an input structure, the input structure comprising:

a main body defining defines a cavity for detachably fitting to the portable electronic device;

the main body is substantially annular-shaped and comprises at least one flexible portion and two opposite accommodation portions connected to the at least one flexible portion to define the cavity, the at least one flexible portion allow the portable electronic device to be received in the cavity with the at least one flexible portion and the accommodation portions tightly sleeved around the portable electronic device; and a diameter of the cavity can be adjusted to suit other portable electronic devices by drawing the flexible portion; and

an electric assembly comprising:

a sensing module configured to trigger electric signals in respond to manipulation of users and send to a communication module through the flexible portion; and

the communication module configured to send the electric signals from the sensing module to the portable electronic device.

9. The portable electronic device as claimed in claim 8 , wherein the two accommodation portions comprise comprises a first accommodation portion, the first accommodation portion forms an operating surface, and a plurality of icons are printed on operating surface to indicate auxiliary functions of the portable electronic device.

10. The portable electronic device as claimed in claim 9 , wherein the sensing module is received in the first accommodation portion and is associated with the plurality of icons.

11. The portable electronic device as claimed in claim 10 , wherein the sensing module comprises a plurality of sensors corresponding to the plurality of icons, respectively, the plurality of sensors are electronically connected to the communication module to trigger the electric signals to the communication module.

12. The portable electronic device as claimed in claim 9 , wherein the electric assembly further comprises a plurality of conductive wires to electronically connected to the sensing module and the communication module, and a part of the plurality of conductive wires are arranged in the at least one flexible portion in a spiral, meander, or other geometrical configuration.

13. The portable electronic device as claimed in claim 12 , wherein the at least one flexible portion is made of elastic materials.

14. The portable electronic device as claimed in claim 8 , wherein the main body comprises a second accommodation portion, the electric assembly further comprises a power supply, both the communication module and the power supply are received in the second accommodation portion.

15. The portable electronic device as claimed in claim 8 , further comprising a receiver communicating with the communication module.