Introduction Of Pencil Case.

Stationery box, a box that students use to store pens, pencils, rulers, erasers and other stationery. There are many types of textures, generally wood, iron, plastic and other products, with different shapes, mostly cuboid.

There is also a kind of stationery box made of cloth, the real name is "pencil bag", which is the "new favorite of the stationery box" for primary and middle school students in recent years. It is easy to carry and practical, and it is very suitable for our children to use. There is also an automatic stationery box, which is characterized in that: it is composed of an outer box body and an inner box body, the inner box body is movably inserted into the empty surface of one long side of the outer box body, and the upper edge of the other long side of the outer box body connects the box with a hinge. 

Lid, a box lid is a box lid connected by two narrow lid hinges. There are spring sheets on the outside of the short side of the outer box body, the spring sheets pass through the outer box cover to the short side of the inner box body, and there are a plurality of grooves on the short side of the inner box body which are matched with the ends of the spring sheets. The effect of the invention is that the automatic pencil case and the body can be changed in size and size, and can be adjusted according to the amount of stationery to be put in. Convenient and practical.