BigPatents India

The lock inside guide of roller shutter door according to this invention is formed by pumping two curved sections on the ridge of guide to bring about a gap within the guide in the position suitable for the end of side-lock iron bar. The upper curved section helps to obstruct the end of side-lock iron bar, and the lower curved section helps to prevent the obstruction of the end plates of curtain slats from the upper curved section during the moving upwards of the roller shutter door. For installation of the central shutter lock on the curtain slat, we will pump the ridge of guide to make an upper curved section and a lower curved section together a single time in the desired position. Thus it is not necessary to perform the are welding or penetrating the hole on the guide and the building pier, and the lock inside guide according to this invention is strong, can be not bent and is graceful.