Patent ID: 8750554
Filing Date: 2014-06-10
Classification: H04R

Abstract:
1. A speaker diaphragm, comprising: a diaphragm; and plural dimples which are radially disposed from a center side of said diaphragm toward an outer periphery side of said diaphragm so as to form a plurality of circle-like arrangements of dimples, and which have arch structures each formed so as to have a concave-like shape in such a way that a stress is dispersed, wherein any of said dimples are not formed at a central portion on the most inner periphery side of said diaphragm, and said central portion on the most inner periphery side is used as a spacer for a notation such as a brand name or a logo, wherein a pitch of adjacent dimples in a respective circle-like arrangement becomes smaller as a radial position of a circle-like arrangement goes from the outer periphery side towards the center side of said diaphragm, such that for each of the circle-like arrangements the respective pitch of adjacent dimples in one circle-like arrangement is the same as or less than that of an immediately adjacent circle-like arrangement as the circle-like arrangements go from the outer periphery side towards the center side of said diaphragm, and wherein the pitch of adjacent dimples has a value of approximately 3 mm for each dimple in the respective circle-like arrangement of the outer periphery side and has a value of approximately 0.5 mm for each dimple of the respective circle-like arrangement of the center side.