| 摘要 |
PURPOSE:To make a driving motor smaller in size by making a visor begin to turn, when the driving motor is run in a rotational direction to turn it in a container, after an adjusting nut is turned on the side to reduce the adjustment and locked under a condition that the pushing force of a spring is reduced and the regulating power becomes weakest. CONSTITUTION:The male screw 7a of a shaft 7 and an adjusting nut 19 are right-handed screws and, when a driving motor 24 is run at a standing position, a driving gear 25 turns anticlockwisely to the looked from lower side. The adjusting nut 19 turns closkwisely and moves upward until it contacts to a stopper 20 on reducing side and the adjusting nut 19 is locked. Then the projection 16a of a regulating mechanism 21 is released from a regulating groove 15a by the action of the driving motor 24, the driving gear 25 moves around the circumference of the adjusting nut 19 clockwisely and the visor 2 turns to the housing position. As a regulating spring 17 gets into its maximum length and its pressurizing power F becomes minimum, the projection 16a can easily be released from the regulating groove 15a. |
