| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a shield opening/closing device which can finely control a partial open state partially passing light by tilt-operation of a shield while properly setting an opening/closing operational state of the shield which shields light and enlarging an opening ratio in a maximum open state passing light as it is, and of which adjustment performance relative to lighting is enhanced. <P>SOLUTION: A plurality of shields 30 which shield light are arranged so as to be movable in a lateral direction with respect to an upper frame 10, a spiral groove of a moving shaft 41 is engaged with upper end parts of the shields 30, and the shields 30 are moved in the lateral direction by the guidance of the groove due to rotation of the moving shaft 41. Thereby, a movement mechanism of the shields 30 can be simplified while rapidly moving the shield 30 between an aggregate arrangement state of the shields 30, in which a lower side region 60 of the upper frame 10 is opened to a maximum extent, and a distribution arrangement state of the shields 30, in which passing of light is adjustable by changing the direction of the shields 30, only by rotation of the moving shaft 41, thus achieving downsizing and cost reduction of the entire movement mechanism relative to the lateral movement of the shields 30. <P>COPYRIGHT: (C)2013,JPO&INPIT |
