Telescopic block assembly and door opening-closing device

• Main Author: GAO SHAOFEI
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2019
• Subjects: CHECKS FOR WINGS; DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; FIXED CONSTRUCTIONS; HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THEFUNCTIONING OF THE WING

The utility model provides a telescopic block assembly and a door opening and closing device, and the telescopic block assembly comprises a pedestal which comprises an accommodation cavity, and an opening of the accommodation cavity is located at a side surface of the pedestal; the moving block stru...