| 摘要 |
An inserting type earphone device (100) is broken down into a signal-to-sound converter (10), an ear pad (30) to be inserted into an acoustic meatus of user, a sound tube (20) provided between the signal-to-sound converter (10) and the ear pad (30) and a switching mechanism (40) provided in association with the sound tube (20) and ear pad (30), and a sound hole (23a), which is formed in the sound tube (20) for connecting a sound propagation hole (21) to the outside, is open to and closed with the switching mechanism (40); the switching mechanism (40) makes the sound hole open and closed through rotation thereof around the sound tube (20) so that the ear pad (30) is not inclined in the acoustic meatus during the rotation, whereby the ear pad (30) is not dropped off from the acoustic meatus. |
