| 摘要 |
An acoustical passageway (20) is provided between a flip cover (16) and a body (12) member of a radiotelephone (10), such as a cellular telephone, by directing a portion of the passageway through the hinge connecting the two components in a direction coaxially aligned with the axis of rotation (18) of the cover with respect to the body. The internal passageway extends from an aperture provided at a predetermined position in the cover, through a hinge pin (34) connecting the cover to the body member, and thence through an internally extending passageway (14) in the body member to a microphone (28) disposed in the body member. The acoustical path between the apertures in the cover and the microphone remains sealed irrespective of the open or closed position of the cover. The interconnection between the passageway disposed in the cover and the passageway disposed in the body member is maintained in biased abutment as a result of an interference fit between the respective components. The biased abutment is maintained even after extended, prolonged use of the radiotelephone.
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