Auxiliary opening device for civil defense door

• Main Authors: ZHANG JUNWEI, SONG JIANFENG
• Format: Patent
• Language: Chinese; English
• Published: 10.06.2022
• Subjects: CHECKS FOR WINGS; DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; FIXED CONSTRUCTIONS; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING

The utility model discloses an auxiliary opening device of a civil defense door. The auxiliary opening device of the civil air defense door comprises the civil air defense door installed on a wall body, a box body is further installed on the wall body, a winding mechanism is arranged in the box body...