REEL DRIVING DEVICE

摘要

PURPOSE:To reduce noise produced by a reel driving mechanism by preventing the collision and contact of tooth tips of the gears of the mechanism with each other. CONSTITUTION:The shape of the tooth surface (x) of a gear 32 to be meshed with another gear 31 which is rotated in an interlocking way with a tape take-up reel and gives a rotational driving force on the side on which the tooth surface of the gear 32 does not come into contact with that of the gear 31 is formed in such a way that the tooth thickness decreasing rate toward tooth tips is made larger than the shape of the tooth surface (y) of the gear 32 on the side on which the tooth surface does not come into contact with that of the gear 31.