Extension-type rain tent for power transformation box

The utility model discloses an extension-type rain tent for a power transformation box. The extension-type rain coat comprises a left front support arm, a left rear support arm, a right front support arm, a right rear support arm, tent cloth, a front cover shell, a rear cover shell, a left arm hinge and a right arm hinge, wherein the left front support arm and the right front support arm are flexibly connected with the left rear support arm and the right rear support arm respectively, torsional springs being disposed at the hinged connection parts; when no external forces are applied, the left front support arm and the right front support arm are completely unfolded from the left rear support arm and the right rear support arm; the front left front support arm and the right front support arm are connected to the front cover shell through the a left rotating shaft and a right rotating shaft respectively, the left rear support arm and the right rear support arm are flexibly connected with the left arm hinge and the right arm hinge respectively, the left arm hinge and the right arm hinge are disposed in two ends of the rear cover shell, a scroll is disposed between the left arm hinge and the right arm hinge, and one end of the tent cloth is rolled onto the scroll while the other end is connected to the inner side of the front cover shell. The beneficial effects of the extension-type rain tent are that through the structure designed specially for special environment and requirements of a power transformation box, the rain tent is high in structural strength and excellent in stability.