Patent ID: 11891844
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 5:
6. The device according to claim 1, wherein:
the locking piece passes through the slot of the upper holder and enters the locking groove, so that when the door is open, the locking pin module swings around the upper and lower pins;
when the locking piece swings at a given angle that does not correspond to the slot in the state where the upper and lower pins of the locking pin module are fitted to the upper and lower holders of the locking holder module, the locking piece is restrictedly inserted into the locking groove; and
when the locking pin module swings, the locking piece does not correspond to the slot of the locking holder module at the given angle, and the locking piece is prevented from escaping the locking groove.