Acoustic conversion device and acoustic conversion device assembly method

An acoustic conversion device comprising:

• (a) an armature including
• (1) a vibrating portion extending in a predetermined direction, and
• (2) a coil attachment portion extending parallel to the predetermined direction of said vibrating portion;
• (b) a coil attached directly to said coil attachment portion so that said vibrating portion is passed therethrough;
• (c) a pair of magnets (i) disposed on both sides of a portion of said vibrating portion protruding from said coil, and (ii) spaced from said vibrating portion, and
• (d) 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,
• wherein,
• the armature further includes a joint portion protruding from said coil attachment portion,
• the vibrating portion protrudes from an uppermost edge of the joint portion, and
• the armature includes an end that does not protrude beyond the coil.

An acoustic conversion device assembly method comprising:

• providing an armature having a vibrating portion extending in a direction, and a coil attachment portion extending parallel to said vibrating portion in said direction;
• attaching a coil directly to said coil attachment portion of said armature;
• inserting a portion protruding from said vibrating portion being passed through said coil between a pair of magnets, said pair of magnets facing each other and disposed on a yoke;
• and
• adjusting the positions of said yoke and said armature so that said vibrating portion is located in a predetermined position between said pair of magnets,
• wherein,
• the yoke is 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,
• the armature further includes a joint portion protruding from said coil attachment portion,
• the vibrating portion protrudes from an uppermost edge of the joint portion, and
• said coil attachment portion of said armature and said coil have coplanar end surfaces.