| 摘要 |
A distribution board with a function for removing an inner pressure is provided to exhaust the inner pressure according to a variable pressure level sequentially by using elastic springs, a main plate, and a sub plate. Air with pressure to form a predetermined pressure level is formed at a distribution board body(90). An exhaust device body(400) is connected to the distribution board body and has an outlet(410) to discharge the air, an inner space(420), and a spring installation groove(430) at inner four edges. A main plate is installed at an upper side of the exhaust device body to cover the outlet. A receiving unit is installed at a plurality of positions of the main plate and is composed of a receiving hole(151) with an open upper part and a ventilation hole(152) which is stepped and formed to connect the inner space from the receiving hole. A plurality of sub plates are arranged in the receiving holes. First elastic springs(310) with a first elastic coefficient are installed at the spring installation grooves and elastically support the bottom parts of four edges of the main plate and the bottom parts of the spring installation grooves. Second elastic springs(320) with a second elastic coefficient are installed at the receiving holes and elastically support the bottom parts of the sub plates and the bottom part of the receiving hole. |
