| 摘要 |
PURPOSE: A switch structure for an audio is provided to improve the efficiency and convenience of a song selection operation by changing the number of selected songs based on the number of stored songs in the audio when a knob assembly rotates. CONSTITUTION: A knob(110) selects one song form a plurality of songs. A switch detects the selected song by the knob. A protrusion unit(130) is arranged between the knob and the switch. The protrusion unit detects the movement of the click of the knob. The protrusion unit includes an encoder(131), a protrusion(132) and a drive part(133). The selection switch(134) of the protrusion unit applies power to the drive part.
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