Safe case provided with linkage plate limiting mechanism

The invention relates to a safe case provided with a linkage plate limiting mechanism. The safe case comprises a safe case body and a door sheet. A door catch is arranged on the door sheet. A door catch linkage plate in linkage with the door catch is connected to the door catch. A rotary supporting mechanism is arranged in the position, close to a door frame, of the bottom of the inner side of the door sheet. The rotary supporting mechanism comprises a limiter, a transverse positioning rod and a torsional spring. The transverse positioning rod is fixed to the inner side of the door sheet. The limiter is connected to the transverse positioning rod in a sleeving mode and can rotate on the transverse positioning rod. The transverse positioning rod is sleeved with the torsional spring. The torsional spring is located on one side of the limiter. Under the torsion of the torsional spring, the upper end of the limiter is supported at the bottom end of the door catch linkage plate, and the lower end of the limiter is