On February 19, according to the announcement of the State Intellectual Property Office, Guangzhou Metro Design and Research Institute Co., Ltd. applied for a project called "a connection lock with a steering gasket", with the public number CN117552534A, and the application date is September 2021.
The patent abstract shows that the invention discloses a connection lock with a steering gasket, which comprises: a sub-part and a parent part, on which an anchor structure is arranged for anchoring with a prefabricated member; The subroutine comprises a first force transmission box body and a first fastener, wherein the first fastener is movable in the first force transmission box body; The parent part comprises a second force transmission box body, a second fastener and a transmission structure. The second fastener is movably arranged in the second force transmission box body, and the transmission structure is matched with the second fastener. The transmission component drives the second fastener to rotate and is connected with the first fastener. The invention allows the child and parent parts to have certain initial installation errors in any direction.