Paper carries special right angle of platform to draw rule

The utility model relates to an open and carry the special right angle of platform to draw rule, including pull -up rule board and drop -down rule board, drop -down rule board outside limit is the hypotenuse and drop -down rule board front end width is greater than drop -down rule board rear end width, drop -down rule board outside edge hypotenuse length is equipped with the baffle and the baffle sets up on drop -down rule board perpendicularly, pull -up rule board outside limit is for being equipped with the connecting plate with the drop -down hypotenuse and the pull -up rule board outside of advising board outside edge matching along the hypotenuse length, pull -up rule board is installed through the connecting plate on drop -down rule board with baffle fixed connection and the lower extreme interfacial of the up end of drop -down rule board and pull -up rule board leaves the clearance. The advantage: paper carries special right angle of platform to draw rule can enough correct the paper of off tracking, a