Tunable earphone

1. A tunable earphone, comprising:

a body, comprising a small air hole and a large air hole;

a front cavity, disposed on one side of the body;

a rear cavity, disposed on the other side of the body; and

a decorating plate, covering the rear cavity, comprising:

a receiving groove;

a shielding member, disposed in the receiving groove; and

a channel, disposed in the receiving groove;

wherein when the decorating plate is rotated to a first position, the shielding member shields the large air hole, and the channel corresponds to the small air hole, so that the front cavity communicates with the rear cavity through the channel; when the decorating plate is rotated to a second position, the shielding member shields the small air hole, and the channel corresponds to the large air hole, so that the front cavity communicates with the rear cavity through the channel.

2. The tunable earphone according to claim 1 , wherein the body comprising:

a shaft hole, one end thereof corresponding to the front cavity, the other end thereof corresponding to the rear cavity; and

a sealing ring, disposed in the shaft hole.

3. The tunable earphone according to claim 2 , wherein the decorating plate comprises a shaft portion, extended from the receiving groove and sleeved by the sealing ring.

4. The tunable earphone according to claim 3 , wherein the shaft portion comprises an outer threaded portion, the shaft hole comprises an inner threaded portion, the outer threaded portion threads with the inner threaded portion.

5. The tunable earphone according to claim 3 , wherein the shaft portion comprises a hooked portion for connecting with the shaft hole.

6. The tunable earphone according to claim 3 , wherein the shaft hole comprises a sub hooked portion, the shaft portion comprises a buckling groove, and the sub hooked portion is fastened with the buckling groove.

7. The tunable earphone according to claim 2 , wherein the body comprises a locking member, one end thereof is fastened with the shaft hole, and the other end thereof is threaded with the decorating plate.

8. The tunable earphone according to claim 1 , wherein the decorating plate has a rotating angle, one end of the rotating angle corresponds to the first position, and the other end of the rotating angle corresponds to the second position, the rotating angle is larger than or equal to an angle defined between the large air hole and the small air hole.

9. The tunable earphone according to claim 8 , wherein the rotating direction is larger than or equal to 30 degrees.

10. The tunable earphone according to claim 1 , wherein the body comprises:

a sliding groove,

a first block, disposed at one side of the sliding groove; and

a second block, disposed at the other side of the sliding groove.

11. The tunable earphone according to claim 10 , wherein the decorating plate comprises a sliding block, the sliding block is disposed in the sliding groove.

12. The tunable earphone according to claim 1 , wherein the decorating plate comprises:

a side portion, connected with the body; and

a gas leaking hole, disposed on the side portion and communicating with the channel.

13. The tunable earphone according to claim 1 , wherein the shielding member is made of a material selected from a group consisting of elastic and soft materials.

14. The tunable earphone according to claim 1 , wherein the decorating plate comprises an indicating portion disposed thereon, and the body comprises a plurality of positioning portions disposed thereon, and the indicating portion corresponds to one of the positioning portions.

15. The tunable earphone according to claim 1 , wherein the decorating plate comprises a switching portion disposed on the side portion thereof.