Abstract: A high performance speaker is provided and includes a simple structure magnetic circuit achieved without the need of a complicated manufacturing process, and a high performance speaker is provided and includes a simple structure diaphragm achieved without the need of a difficult process for forming a U shape of a narrow width in the diaphragm. A speaker 100 is equipped with an inner-magnet-type magnetic circuit 4 provided with a magnet 1, a plate 2 and a yoke 3, a voice coil 7, and a diaphragm 6 supporting the voice coil 7 in place close to the end of the plate 2 while allowing the voice coil to vibrate. The yoke 3 is formed in an approximately flat plate shape having a diameter equal to or larger than that of the plate 2.

Abstract: A diaphragm and a speaker unit which can prevent generation of abnormal sound by suppressing rolling phenomenon. The speaker unit has a diaphragm. The diaphragm includes a portion for supporting a voice coil, and a sound emitting portion formed continuously to one end thereof. The voice coil supporting portion has a shape extending reversely to the sound emitting direction. The sound emitting portion includes a step portion having a surface substantially perpendicular to the sound emitting direction, and a bent portion having a cross-section bent toward the inside of the voice coil supporting portion from one end of the step portion.

Abstract: A diaphragm and a speaker unit which can prevent generation of abnormal sound by suppressing rolling phenomenon. The speaker unit has a diaphragm. The diaphragm includes a portion for supporting a voice coil, and a sound emitting portion formed continuously to one end thereof. The voice coil supporting portion has a shape extending reversely to the sound emitting direction. The sound emitting portion includes a step portion having a surface substantially perpendicular to the sound emitting direction, and a bent portion having a cross-section bent toward the inside of the voice coil supporting portion from one end of the step portion.

Abstract: A high performance speaker is provided and includes a simple structure magnetic circuit achieved without the need of a complicated manufacturing process, and a high performance speaker is provided and includes a simple structure diaphragm achieved without the need of a difficult process for forming a U shape of a narrow width in the diaphragm. A speaker 100 is equipped with an inner-magnet-type magnetic circuit 4 provided with a magnet 1, a plate 2 and a yoke 3, a voice coil 7, and a diaphragm 6 supporting the voice coil 7 in place close to the end of the plate 2 while allowing the voice coil to vibrate. The yoke 3 is formed in an approximately flat plate shape having a diameter equal to or larger than that of the plate 2.