| 摘要 |
PURPOSE:To use this system as a head phone or a speaker taking a headphone unit as a drive section by forming freely attachably and detachably the head phone unit and a head band having an ear pad delivering the vibration of the diaphragm on its surface. CONSTITUTION:The diaphragm 10 is provided in opposite to a driving section formed by a center pole 6, a plate 7, a coil 8 and an annular permanent magnet 9 to form the speaker. The ear pad 13 is fitted to a screw part of the diaphragm 10 via an annular spacer 12 made of a nonmagnetic material. The ear pad 13 is fitted to a suspension 14 of a support 18 with a screw 15. In bringing the ear pad 13 into contact with the diaphragm made of a polymer material such as plastic (not shown), the ear pad 13 is operated as the speaker. Further, in connecting the headphone unit 4 to a head band (not shown) by a contact section 19 provided at the back of a center pole 6, the ear pad acts like a headphone. Thus, the ear pad is used as the headphone or the speaker. |
