| 摘要 |
PURPOSE: A headphone device is provided to supply high sound quality suitable for a surrounding environment by freely changing the state of the headphone device into an open type or closed type. CONSTITUTION: A cover(1) is attached to a joint(2). The joint is connected to a body(3). The joint moves to the inside and outside of the body. A headset is changed to an open type or closed type by controlling the exposure of the speaker. A device for opening and closing the cover of a headphone speaker is connected to the body. |
