| 摘要 |
PURPOSE: A distance control video call earphone hands free unit for controlling distance using back rash of flexible cord is provided to minimize the weight volume by forming cords, spool and storage case in to one body while winding two flexible cords in a specific direction. CONSTITUTION: A cord rolled with a spool is turned in one way through a reel type handle by using counter-rotation of a flat flexible cord, in closed circular space. The turned code is fixed. A microphone is installed to the inside of spool. An earphone connection plug, a winded spool, and a mike are formed in a detachable way.
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