Locking mechanism

The utility model relates to a locking mechanism which is good in stability and simple in structure. According to the technical scheme, the device comprises a bottom plate, a connecting shaft arranged at the front end of the bottom plate, a lock pin frame arranged at the rear end of the bottom plate, an upper crank arm and a lower crank arm which are coaxially arranged on the connecting shaft, a lock pin slidably arranged in the lock pin frame and a handle hinged to the upper end of the lock pin frame, and the lower end of the handle is connected with the lock pin. A lock groove matched with the lock pin is jointly formed between the upper crank arm and the lower crank arm, a torsional spring is arranged on the connecting shaft, one end of the torsional spring is connected with the upper crank arm or the lower crank arm, the other end of the torsional spring is connected with the fixing column, the connecting shaft comprises a riveting portion, a positioning portion, a connecting portion and a shaft sleeve ar