Voice coil speaker

A voice coil speaker comprising:

• a diaphragm;
• and
• a bobbin that is connected to the diaphragm and has a voice coil formed thereon,
• wherein the bobbin has a bobbin main portion around which the voice coil is wound, and an extension portion that extends from the bobbin main portion and in which a signal line conducted to the voice coil is formed, the bobbin main portion and the extension portion are integrally formed of a flexible print board, and a site at which the extension portion extends is covered by a shield case,
• wherein the shield case is equipped at a back side of a yoke, a cut-out portion is formed in the yoke, and the extension portion is configured to pass through the cut-out portion and extend into the shield case at the back side of the yoke, and
• wherein the yoke has a yoke bottom portion and a yoke protrusion portion protruding from the yoke bottom portion into the bobbin, a side surface cut-out portion is formed at a site corresponding to the extension portion on a side surface of the yoke protrusion portion, a bottom surface cut-out portion intercommunicating with the side surface cut-out portion is formed in the yoke bottom portion, and the extension portion extending from the bobbin main portion is configured to pass through the side surface cut-out portion and the bottom surface cut-out portion and extend into the shield case at the back side of the yoke.