Automatic opening device of portable fire extinguisher

The invention relates to the field of fire-fighting robots, in particular to an automatic opening device of a portable fire extinguisher. The device comprises a mounting frame, an upper sliding assembly, a lower sliding assembly, a first electric push rod, a pin pulling assembly and a lower pressing plate, wherein the mounting frame is provided with a first guide rail in the vertical direction, and the upper sliding assembly and the lower sliding assembly are arranged on the first sliding rail in a sliding mode. The lower sliding assembly is connected with the first guide rail in a detachablemode, and the upper sliding assembly is arranged below the lower sliding assembly. The upper sliding assembly and the lower sliding assembly are connected to each other through the first electric pushrod, the pin pulling assembly is arranged on the upper sliding assembly in a sliding mode in the horizontal direction, and the lower pressing plate is fixedly arranged on the upper sliding assembly.According to the automatic