Patent ID: 6341167
Filing Date: 2002-01-22
Classification: H04R

Abstract:
A speaker comprising:a magnetic circuit containing at least a magnetic gap; a frame connected to said magnetic circuit; and an integral unit consisting of a voice coil bobbin unit and a diaphragm unit connected at a periphery of said frame via an edge, said integral unit being formed of said voice coil bobbin unit of a ring shape which is wound around with coil to be placed in said magnetic gap and said diaphragm unit formed in a shape of an inverse letter â€œUâ€  disposed on an upper edge of said voice coil bobbin unit; wherein said integral unit consisting of said voice coil bobbin unit and said diaphragm unit is prepared out of a sheet which was provided through a punching of a sheet into a shape of a letter â€œHâ€  with a pair of extensions from both sides, forming the sheet into the shape of the inverse letter â€œUâ€ , and joining the extensions.