Acoustic conversion device and acoustic conversion device assembly method

摘要

An acoustic conversion device includes: a driving unit including a pair of magnets disposed so as to face each other, a yoke to which the pair of magnets are attached, a coil to which driving current is supplied, a vibrating portion which vibrates when driving current is supplied to the coil, and an armature disposed between the pair of magnets with the vibrating portion being passed through the coil; and a diaphragm unit including a diaphragm, and a beam portion for propagating the vibration of the vibrating portion to the diaphragm; with a coil attachment portion to which the coil is attached, located in a state in parallel with the vibrating portion, being provided to the armature.

主权项

1. An acoustic conversion device comprising:
(a) a driving unit including
(1) a pair of magnets disposed to face each other,(2) a yoke to which said pair of magnets are attached, said yoke being configured of a plurality of members including a first member to which a first magnet of the pair of magnets is attached, and a second member to which a second magnet of the pair of magnets is attached, the first member and the second member being configured such that a distance between the pair of magnets is adjustable,(3) a coil operable to receive a driving current, and(4) an armature spaced from said yoke and having (i) a coil attachment portion attached directly to said coil, (ii) a joint portion protruding from said coil attachment portion, and (iii) a vibrating portion protruding from an uppermost edge of the joint portion so as to at least partially extend through said coil and between said pair of magnets, said vibrating portion operable to vibrate when the driving current is supplied to said coil; and (b) a diaphragm unit including
(1) a diaphragm, and(2) a beam portion operable to transmit vibration of said vibrating portion to said diaphragm.