Material loading device

A material loading device, comprising:

• a loading frame defining a receiving cavity and at least one opening communicating with the receiving cavity, wherein the receiving cavity is configured to receive materials, two opposite inner walls of the loading frame define a plurality of first slots;
• and
• at least one first locking mechanism disposed at the at least one opening, the at least one first locking mechanism comprising a first locking portion extending along a gravity direction, the first locking portion comprising a plurality of second slots and a plurality of blocks adjacent to the plurality of second slots,
• wherein the first locking portion is configured to move along the gravity direction under an action of gravity to drive the plurality of blocks to move to and lock the plurality of first slots;
• or, the first locking portion is configured to move in an opposite direction of the gravity direction to drive the plurality of second slots to move to and unlock the plurality of first slots,
• along the gravity direction, a height of a cross-section of each of the plurality of second slots is larger than or equal to a height of a cross-section of each of the plurality of first slots;
• a height of a cross-section of each of the plurality of blocks is larger than or equal to the height of the cross-section of each of the plurality of first slots.