Patent ID: 8135165
Filing Date: 2012-03-13
Classification: H04R

Abstract:
1. A diaphragm for a component of a loudspeaker for a small electronic device, the diaphragm comprising: orthogonal long and short axes on a plane, a central portion having the intersection of the long and short axes as the center thereof, a peripheral portion spreading around the central portion, wherein the central portion being formed thicker than the peripheral portion, the diaphragm is configured to vibrate with an outer circumferential edge of the peripheral portion which has a fixed end, wherein the outer circumferential edge line of the peripheral portion is composed of two first sections each intersecting with the long axis and two second sections each intersecting with the short axis, each of the two first sections describes a curve of varying curvature axis and has a minimum curvature radius at the intersection with the long axis, and each of the two second sections has a straight line in parallel to the long axis, wherein the border line between the peripheral portion and the central portion describes a curve having a minimum curvature radius at an intersection with the long axis and a maximum curvature radius at an intersection with the short axis, and wherein the peripheral portion is shaped such that a width thereof radially extending from the intersection is smallest on the short axis, and largest on the long axis, and the width monotonically increases from a minimum width on the short axis to a maximum width on the long axis.