Loudspeaker
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuaki Tamura, Shoji Tanaka
Life of this patent
Estimating the term…
Abstract
A loudspeaker is provided, which includes a frame, a voice coil bobbin, and a diaphragm connected to the frame and the voice coil bobbin, wherein the diaphragm is connected to the voice coil bobbin in such a manner that a cone angle between the diaphragm and the voice coil bobbin becomes small enough to obtain a preferable treble reproduction threshold frequency, the diaphragm ha a first connected portion connected to the voice coil bobbin and a second connected portion connected to the frame, and the diaphragm has an arch-shaped cross section so as to have a top portion formed outward from both the first connected portion and the second connected portion.
Claims13
A loudspeaker comprising a frame, a voice coil bobbin, and a diaphragm connected to the frame and the voice coil bobbin,
- wherein the diaphragm is connected to the voice coil bobbin in such a manner that a cone angle between the diaphragm and the voice coil bobbin is no greater than 45°,
- the diaphragm has a first connected portion connected to the voice coil bobbin and a second connected portion connected to the frame,
- the diaphragm has an arch-shaped cross section defining a curve extending from the first connected portion to the second connected portion so as to have a top portion formed outward from both the first connected and the second connected portion, and
- the loudspeaker further comprises a center cap which is connected to the diaphragm and is separate from the voice coil bobbin.
Dependencies are inferred from the claim text.