Spring type foldable smoke barrier gate plate

The utility model discloses a spring type foldable smoke blocking flashboard which comprises a sleeve type flashboard hinge, and the sleeve type flashboard hinge comprises a sleeve and a flashboard hinge axially fixed outside the sleeve. A positioning opening is formed in one end of the sleeve; the positioning opening is formed by cutting a spiral line with the screw pitch being 24 mm, the diameter being 26 mm, the number of turns being 0.5 and the height being 12 mm. The spiral rotating shaft rod comprises a shaft body, and a key groove is formed in one end of the shaft body; a sleeve limiting part is integrally manufactured at the end, away from the key groove, of the shaft body. A spiral inclined surface is arranged on the sleeve limiting part; the spiral inclined surface is formed by anticlockwise cutting for 315 degrees along a spiral line with the screw pitch of 24 mm, the diameter of 26 mm, the number of turns smaller than 1 and larger than the number of turns of the positioning opening and the height