| 摘要 |
According to one embodiment of the present invention, the space of an inner path can be secured by forming the door of an outdoor billboard unit case with a roll blind method, thereby saving the use of a raw material and reducing the total load of an outdoor billboard. For this, one embodiment of the present invention includes a case part which has a front surface to which a light source module is attached; a door part which includes a handle bar which has a case part backside opening part which is located in the lower part of the door; a guide part which has a rail inside and guides the reciprocating motion of the door part in the side end of the door part; a winding part which has a rotation bar which is connected to the upper part of the door part and an elastic part which is prepared in both side ends; and a ventilation part which includes an elastic part fixing member which has a ventilation hole in one surface of the door part and is prepared at both ends of the ventilation hole, a shutter member which is located in the ventilation hole, and a spring which rotates between the elastic part fixing member and the shutter member. |
