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 main frames respectively, so that the main frames can be adsorbed to a door frame and a door body, the limiting rod and the movable rod are fixed to the two main frames through the fixing pins respectively, one end of the spring is fixed and wound around the limiting rod, the other end of the spring is fixed through a limiting column on the movable rod, and limiting of the movable rod is achieved. When the door is opened, the spring can store elastic potential energy along with the movement of the movable rod, and the spring releases the elastic potential energy to pull back the door to achieve the purpose of automatically closing the door after the hand is released. The adhesion performance of the main frame to t