| 摘要 |
A tape loading device comprises: a plate cam which moves in a straight line at a constant speed; a rack provided on the plate cam; an arm load gear provided with a gearwheel which engages with the rack, and rotates as the plate cam executes linear motion; a lever mechanism which moves as the arm load gear rotates; a tape guide provided at the end of the lever mechanism, which withdraws the tape from the cassette starting from the unloaded position and finishing in the loaded position; and a guide member provided with a guide hole which guides the tape guide from the unloaded position to the loaded position, or in the reverse direction. The gearwheel on the arm load gear which engages with the rack comprises a first tooth having a pitch circle of radius referred to as a first radius, and a second tooth having a pitch circle of radius referred to as a second radius which is larger than the first radius; and when the tape is loaded, the rack of the plate cam engages with the first tooth of the arm load gear so as to move the tape guide from the unloaded position of the tape guide to a predetermined position before the loaded position of the tape guide, and the rack of the plate cam subsequently engages with the second tooth of the arm load gear so as to move the tape guide to its loaded position. <IMAGE> |
