Speaker apparatus
View Patent ↗A cross-sectionally substantially-semicircular portion of an edge portion adapted to connect an outer periphery of a diaphragm to a speaker frame is configured to have an uneven-thickness structure in which the thickness of the portion gradually decreases toward a sticking portion of an outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm. Thus, the propagation characteristic of vibrations generated on the edge portion is improved. Disturbance is prevented from occurring in an mid-range frequency characteristic due to inverse resonance caused by the edge portion.
1. A speaker apparatus, comprising:
a corrugation damper having a ridge portion and a groove portion which are alternately and coaxially arranged along a radial direction thereof, respectively;
a speaker frame having an outer peripheral edge portion; and
a diaphragm having:
an outer peripheral edge portion being supported by the outer peripheral edge portion of the speaker frame through a cross-sectionally substantially semicircular edge portion; and
an inner periphery being supported by the speaker frame through the corrugation damper, wherein the outer peripheral edge portion has a cross-sectionally substantially-semicircular portion of which a thickness gradually decreases toward a sticking portion of the outer peripheral portion of the speaker frame from a sticking portion of the outer periphery of the diaphragm.
2. The speaker apparatus according to claim 1 , wherein the corrugation damper is adapted so that a bending radius R y of a top portion of the ridge portion and a bending radius R t of a bottom portion of the groove portion are set so that R y <R t .
3. The speaker apparatus according to claim 2 , wherein the corrugation damper is adapted so that a corrugation height H y of the ridge portion and a corrugation depth H t of the groove portion are set so that H y <H t .