| 摘要 |
PURPOSE:To decrease the occurrence of mid-way locking and to permit sure mounting of a cassette by forming the guiding part of a locking lever near the terminal thereof in such a way that the during descending of a cassette holder increases abruptly at the point near the dead point. CONSTITUTION:When a cassette holder is depressed and is moved downward, the force to be exerted upon a locking roll 11 and the pressure angle of a locking lever 31 increase, and the projecting piece A of the lever 31 moves in the direction of an arrow (d) beyond the projecting part B of an unlocking arm 16 until a stopper pin 14 of the locking lever abuts on the piece A and is thereby detained. When the holder 1 is depressed and is moved down further, a locking roll 11 moves to the locking part 31B of the level 31 beyond the projecting piece 31C provided near the terminal of the guiding part 31A of the lever 31, thereby locking the cassette in the cassette down position. |
