Title:
振動板またはダストキャップ並びにスピーカーユニット
Document Type and Number:
Japanese Patent JP7185116
Kind Code:
B2
Abstract:
There is provided a diaphragm or a dust cap configured to emit a sound wave and an electrodynamic speaker unit including the diaphragm or the dust cap. In the diaphragm or the dust cap, multiple contours defining the shape of a curved surface of a diaphragm portion configured to emit a sound wave are each defined by multiple regular polygons configured such that all corner portions thereof are chamfered in arcs, the regular polygons are arranged with different predetermined rotation angles about the center point of a concentric circle such that the position of the corner portion of the regular polygon in a circumferential direction is different between adjacent ones of the contours, and spiral recessed-raised portions corresponding to the multiple contours are formed at the curved surface.
Inventors:
Mt. Inoue
Application Number:
JP2018160625A
Publication Date:
December 07, 2022
Filing Date:
August 29, 2018
Export Citation:
Assignee:
Onkyo Co., Ltd.
International Classes:
H04R7/14; H04R9/02
Domestic Patent References:
| JP64029990U | ||||
| JP3796937B2 | ||||
| JP2043093U | ||||
| JP3508834B2 | ||||
| JP50010231U |
Foreign References:
| US6567529 |