Patent attributes
A material loading device includes a main body defining a receiving cavity and an opening. The receiving cavity receives materials. The main body defines a buckle groove at the opening. A buckle rod movably coupled to the main body at the opening buckles into the buckle groove. A foolproof mechanism is arranged on the main body. A thimble of the foolproof mechanism is slidably coupled to the main body. One end of the thimble is located in the buckle groove. When the buckle rod is buckled into the buckle groove, the buckle rod drives the thimble to slide relative to the main body. A display member of the foolproof mechanism is coupled to the thimble. The main body defines a plurality of recesses corresponding to the display member. The thimble drives the display member to slide relative to the recesses to switch the display member displayed through the recesses.
