Automatic protective guard for building doors and windows

• Main Author: WU FEIMING
• Format: Patent
• Language: Chinese; English
• Published: 19.11.2019
• Subjects: ALARM SYSTEMS; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES; LADDERS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

The utility model discloses an automatic protective guard for building doors and windows. Side frame, a front frame is arranged in the middle of the front side of the side frame; a protective net is mounted in each front frame; a rotating rod b is installed at the bottom of the left side of the fron...