Simple automatic door closing device

• Main Authors: LI YONGPING, CHEN YU, YANG PU, LI MINGKAI, LIU YUQI, YU HUAN, KANG HEMING, DENG HAILONG
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2022
• 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 relates to a simple automatic door closing device. The simple automatic door closing device comprises a main frame, a friction block, a fixing pin, a suction cup, a spring, a limiting rod and a movable rod. One ends of the two suction cups penetrate through and are fixed to the two...