SPEAKER

摘要

PROBLEM TO BE SOLVED: To provide a speaker that is mainly applied to reception and loudspeaking of information communication devices and enhances an output sound. SOLUTION: In the speaker of this invention, a groove 10 is placed to an outer circumference of a plate 1a being a component of a magnetic circuit 12 toward a magnet 2 so as to prevent adhesive used for adhesion and fixing of the plate 1a and the magnet 2a from being protruded to the magnetic gap 12a when adhering so as to eliminate the need for a guard of the plate 1a having conventionally been used for protrusion prevention of adhesive resulting in enlarging the diameter of the magnet 2a having conventionally been restricted by the guard and improving an output sound pressure of the speaker.