| 摘要 |
PURPOSE: A speaker unit is provided to secure a vibration area of a cone paper by expanding the vibration area in a short side of the cone paper. CONSTITUTION: The circumference of a cone paper(1) is thin and long. The cone paper has a hole(1a) at the center. The outer circumference of the cone paper is attached to a frame. A magnetic circuit(11) is installed in the frame. A coil is wound around the outside of a cylindrical bobbin. A coil is arranged in magnetic field which is generated from a magnetic circuit. A voice coil(35) is connected to the inner circumference of the cone paper. A first sidewall and a second sidewall are arranged in the yoke of the magnetic circuit. A voice coil(35) is connected to the cone paper through a coupling(41). |
