Stereoscopic inner spacer

A stereoscopic inner spacer, suitable for supporting a plurality of objects in a packaging carton, and the stereoscopic inner spacer comprises:

• a top plate including a first side, a second side opposite to the first side, a third side and a fourth side opposite to the third side, and comprising a first portion and a second portion, wherein the first portion is set with a first buckling piece, a second buckling piece, a third buckling piece and a fourth buckling piece respectively corresponding to the first side, the second side, the third side and the fourth side of the top plate;
• a first side plate comprising a first side piece, a first bottom piece, a second side piece and a first connection piece connected to the first side of the top plate in sequence, and four cover pieces respectively connected to two opposite sides of the first side piece and two opposite sides of the second side piece;
• a second side plate comprising a third side piece, a second bottom piece, a fourth side piece and a second connection piece connected to the second side of the top plate in sequence, wherein the fourth side piece comprises a buckling portion protruding in the second bottom piece, a first buckling hole is formed between the second bottom piece and the fourth side piece after folding the fourth side piece, the second bottom piece is set with a second buckling hole, and the second bottom piece is further set with a first buckling opening and a second buckling opening respectively located on two opposites sides of the second bottom piece adjacent to the second side of the top plate;
• a third side plate comprising a fifth side piece and a first inserted piece connected to a portion of the third side of the top plate in sequence, and a first support piece, a third bottom piece and a fifth buckling piece connected to another portion of the third side of the top plate in sequence, wherein the fifth buckling piece is set with a third buckling hole;
• and
• a fourth side plate comprising a sixth side piece and a second inserted piece connected to a portion of the fourth side of the top plate in sequence, and a second support piece, a fourth bottom piece and a sixth buckling piece connected to another portion of the fourth side of the top plate in sequence, wherein the sixth buckling piece is set with a fourth buckling hole, the portion of the third side and the portion of the fourth side of the top plate are on two opposite sides of the first portion of the top plate, and the first support piece and the second support piece are folded downward to provide support under the top plate;
• wherein, the second side plate is located under the top plate after folding, the first buckling piece is buckled into the first buckling hole, the second buckling piece is buckled into the second buckling hole, the third buckling piece is buckled into the first buckling opening and the third buckling hole, and the fourth buckling piece is buckled into the second buckling opening and the fourth buckling hole, so as to form an open deposed space in the first portion of the top plate;
• wherein, the first side plate, the fifth side piece, the sixth side piece, the first inserted piece, the second inserted piece and the second portion of the top plate are folded to form a rectangular deposed space under the top plate, the second connection piece is located between the second portion of the top plate and the first connection piece, and the fifth side piece and the sixth side piece cover the cover pieces.