| 摘要 |
PURPOSE:To prevent a releasing lever from being rotated by unexpected external forces, by a construction wherein a pair of gears provided between a releasing lever and a release shaft interfere with each other when the lever is located at an intermediate position between an operating position and a releasing position. CONSTITUTION:The gears 14, 18 are so positioned that a forward offset is provided for a pitch circle 14a of the gear 14 and a pitch circle 18a of the gear 18 with the result of slight interference between the gears 14, 18 when the releasing lever 11 is located at an intermediate position between the operating position S and the releasing position. The releasing shaft 17 is slightly bent through its own elasticity when the gears 14, 18 interfere with each other so that the gear 18 is retracted relatively to the gear 14. |
