The frame which is installed a mechanical music box plays a role in resonating the sound and obtaining a rich volume. The rotating body (rubber portion) is rotated at high speed, the force of the spring is controlled by the frictional resistance and the speed is kept constant. The arrangement of vibration plate is depends on the music. We call each plate as "vibration plate" which is divided into something like tooth of the comb.
Vibration plate (a portion of the music box sound) The mechanism is that by rotating drum the pin flick the vibration plate. The projections (called "pins") of the surface of the cylindrical drum is referred the notes in the music. Mainspring serving as a driving source is housed. The pins embedded in the cylinder drum flick the comb teeth, then play the melody.
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