| 摘要 |
An earphone device includes a housing, an electrical unit and a speaker. The housing has first and second portions, and an arc-shaped portion with a first end connected to the first portion and a second end connected to the second portion. The first and second portions have confronting inner end surfaces. The arc-shaped portion has a curved inner surface contiguous with the inner end surfaces of the first and second end portions. The curved inner surface cooperates with the inner end surfaces to define a cavity having a size sufficient to permit extension of an upper part of the human outer ear therethrough. The electrical unit has components distributed between the first and second portions. The speaker is mounted on the housing, is coupled to the electrical unit, and is disposed in the cavity so as to be located adjacent to an ear canal of the human outer ear.
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