Patent ID: 6914998
Filing Date: 2005-07-05
Classification: H04R

Abstract:
1. A speaker apparatus comprising: a magnetic circuit having a magnetic gap; a voice coil located in the magnetic gap; a voice coil bobbin having the voice coil wound thereon; a diaphragm mounted on the voice coil bobbin; a hollow portion defined in that portion of the magnetic circuit which is surrounded by the voice coil, the hollow portion extending in a longitudinal direction of the voice coil bobbin; an elongated rod frictionally fit within the hollow portion of the magnetic circuit and fixed to the diaphragm; and at least one support member located at a predetermined position in the hollow portion of the magnetic circuit for movably supporting the elongated rod in the hollow portion of the magnetic circuit such that the elongated rod is only allowed to oscillate in a regular oscillating direction of the diaphragm.