What are the functions and characteristics of the stationery box?

What are the functions and characteristics of the stationery box?
Stationery box A box used by students to store stationery such as pens, pencils, rulers, and erasers. There are many textures, generally wood, iron, and plastic products with different shapes, mostly rectangular parallelepiped shapes.

The characteristic is that it can hold stationery, generally metal, cloth bag, or plastic pellets.

basic information

1. Iron stationery boxes generally do not have too fancy patterns. Compared with wooden and plastic stationery boxes, iron is not easy to deform or damage. It is very practical and suitable for primary school students.

2. The plastic stationery box has bright colors and rich patterns, but there is no iron stationery box that resists falling and deformation. It is very popular among elementary and middle school students in the mass market, and even college students sometimes use it.
3. Wooden stationery boxes are very rare, with various graphics engraved on them, but primary and middle school students often don't use them because its color is too monotonous, so wooden stationery boxes are gradually becoming scarce.

4. There is another kind of stationery box made of cloth, its real name is "pen bag", which is the "new favorite of 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. 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 one long side of the outer box body, and the upper edge of the other long side of the outer box body is hinged to connect the box. Lid, box lid is a box lid connected by two narrow lid hinges. A spring sheet is arranged on the outer short side of the outer box body, and the spring sheet passes through the outer box cover to reach the short side surface of the inner box body. The short side surface of the inner box body is provided with a plurality of grooves matched with the ends of the spring sheet.