Patent ID: 6923402

Claim:
A tape guide post mechanism for guiding running of a tape, comprising: a post arm, the post arm including a tape guide post, around which the tape is looped at a predetermined angular distance, and which guides running of the tape, and a hole; an arm shaft which engages with the hole and rotatably supports the post arm, wherein when the tape is looped at the predetermined angular distance around the tape guide post, a tape tension is applied to the tape guide post which causes the axis of the arm shaft to be slanted with respect to the longitudinal axis of the hole, an external side surface of the arm shaft is in contact with the hole at at least two separate points in the vicinity of an upper opening of the hole and at at least two separate points in the vicinity of a lower opening of the hole, and the at least two separate points in the vicinity of the upper opening and the at least two separate points in the vicinity of the lower opening of the hole are diagonally opposite each other.