Patent ID: 7724914
Filing Date: 2010-05-25
Classification: H04R

Abstract:
1. A dynamic microphone comprising: a diaphragm including a center dome, a sub dome arranged around the center dome, and a voice coil attached to a boundary between the center dome and the sub dome, said voice coil having a lead arranged along an inner surface of the sub dome, a magnetism generating circuit including a permanent magnet, a pole piece provided on one pole of the permanent magnet, a ring yoke provided on the other pole of the permanent magnet and arranged to face the sub dome, and a magnetic gap formed between the pole piece and the ring yoke, the voice coil being supported in the magnetic gap so as to vibrate through the diaphragm, and an elastic layer made of an elastic adhesive and provided on an inner surface of the sub dome facing the ring yoke, said elastic layer fixing only a lead end of the lead onto the sub dome without attaching the sub dome to other member and projecting toward the ring yoke beyond the lead end to protect the lead end from colliding with the ring yoke, wherein the elastic layer provided on the inner surface of the sub dome has an annular shape without interruption over the inner surface of the sub dome to resiliently support the diaphragm relative to the magnetism generating circuit, thereby effectively preventing abnormal resonance of the sub dome, in addition to fixing the lead end of the lead onto the sub dome.