| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an aperture type bone conduction earphone which has air permeability by communicating with the outside and gives no oppressive feeling in wearing while having the bone conduction earphone of a simple structure type with no head band, of an external auditory canal insertion type and compact, and is also usable in water or of an amphibious type. <P>SOLUTION: An aperture type bone conduction earphone comprises: a magnetic material having an air vent 6' capable of communicating with the outside in wearing at the center part in the axial direction; at least one or more dampers 7 provided around the outer circumference of the magnetic material; a coil bobbin 4 provided around the outer circumference of the magnetic material, housing the damper 7 in its trunk, and with a coil 8 wound around the outer circumference of the trunk; and an aperture type bone conduction device 3 through the magnetic material having the air vent 6'. <P>COPYRIGHT: (C)2012,JPO&INPIT |
