As for double gear-driven mechanism of reel unit, as it can provide the rotor drive shaft in lengthwise, the reel chamber where it can provide the master gear axis in cross direction is included. The main gear is formed by the peripheral aspect of the aforementioned drive shaft, in addition, the 1st master gear is locked to one end of the aforementioned master gear axis. The crank handle is connected to the male screw section of the aforementioned master gear axis. The internal tooth around the peripheral aspect of the aforementioned 1st master gear gearing is done in the tooth of the aforementioned main gear. Other than the aforementioned drive shaft the idle pinion which is provided parallel to side gearing is done in the tooth of the aforementioned main gear. Other than the aforementioned master gear axis the 2nd master gear is locked by the end, the internal tooth of the aforementioned 2nd master gear gearing is done in the tooth of the aforementioned idle pinion. This invention is something which offers the double gear-driven system of the aforementioned rotor drive shaft which uses the aforementioned idle pinion. Because of this, without changing with while strength of the pinion tooth is the cause, it is possible to improve the ability of the aforementioned rotor drive shaft. Simultaneously, double gear-driven mechanism of this invention designates high-speed ratio as feature, adds, production is easy and also the adaptability for circumstance is high.リールユニットの二重歯車駆動機構は、ロータ駆動軸が縦方向に設けられると共にマスター歯車軸が横方向に設けられるリールチャンバを含む。主歯車は前記駆動軸の外周面に形成され、また、第1マスター歯車は前記マスター歯車軸の一端部に固定される。クランクハンドルは前記マスター歯車軸の雄ねじ部に接続される。前記第1マスター歯車の外周面の周りの内歯は前記主歯車の歯に噛合される。前記駆動軸の他側に平行に設けられるアイドルピニオンは前記主歯車の歯に噛合される。前記マスター歯車軸の他端部には第2マスター歯車が固定され、前記第2マスター歯車の内歯は前記アイドルピニオンの歯に噛合される。本発明は、前記アイドルピニオンを使用する前記ロータ駆動軸の二重歯車駆動方式を提供するものである。これにより、ピニオン歯の強度が元のままで変わらないで、前記ロータ駆動軸の能力を向上させることができる。同時に、本発明の二重歯車駆動機構は高速度比を特徴とし、加えて、製造が容易であると共に状況に対する適応性が高い。
