| 摘要 |
PURPOSE: A micro speaker is provided to utilize a camper, which a center cap capable of simultaneously strengthening a high/low range of the speaker and a damper are composed in one. CONSTITUTION: A speaker which a center cap and a damper are formed in one comprises: a cup-shaped yoke; a frame having two concavo-convex grooves structure and supporting the yoke in a center section; a magnet equipped on a bottom side of the yoke; a top plate for forming a magnetic gap between upper parts of the yoke by being equipped on an upper part of the magnet, and for forming a magnetic circuit with the yoke; a vibration plate which an outer circumference is fixed on an upper concavo-convex groove of the frame; a voice coil inserted between the magnetic gap in a state of being winded on a bobbin; a damper for supporting the bobbin to vibrate the bobbin on a center axis, when the bobbin vibrates up and down by a driving signal being applied to the voice coil; and a camper which forms a center cap in one to block an alien substance entering to the magnetic gap, and which an upper part of the bobbin and an inner circumference of the vibration plate are supported on a boundary between the damper and the center cap.
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