Patent ID: 7668333

Claim:
A speaker frame comprising: a rear end wall to which a magnetic circuit is to be fixed; a damper support portion which is formed at a position that is distant forward from the rear end wall by a prescribed distance; an edge support portion which is provided at a position that is distant forward from the damper support portion by a prescribed distance and to which an edge as an outer circumferential portion of a vibration plate is to be stuck and fixed; and plural frame arms which connect the edge support portion to the rear end wall and the damper support portion, wherein: a width of each of the frame arms increases gradually as the position goes from the edge support portion to the damper support portion, and damper-support-portion-side end portions of side edges, opposed to each other, of adjoining frame arms are continuous with each other to form a single, smooth curve having, as an axis of symmetry, a bisector of an angle formed by the adjoining frame arms; and a single vent window is formed on each of the frame arms at the center in its width direction, and a reinforcement rib erects at a circumferential edge of the vent window.