| 摘要 |
A voice coil AND a speaker are provided to transmit the vibration by using a wooden bobbin and to obtain high intensity. A speaker includes a voice coil(20), a vibration plate(12) and a magnetic circuit(30). The voice coil includes a bobbin and a coil. The bobbin is made of a wooden sheet with a predetermined thickness. The coil is wound around an outer circumference of the bobbin. The vibration plate is connected to one end of the bobbin. The magnetic circuit is connected to the voice coil magnetically. The bobbin has the fiber direction in the vertical direction about the winding direction of the coil. The thickness of the wooden sheet is between 0.06 to 0.6 mm. The bobbin has a reinforcing sheet. The reinforcing sheet is adhered to the rear side of the wooden sheet. |
