In the early 1980s, pencil boxes in elementary school were mostly made of iron. The surface of the lid was usually cartoon characters such as Transformers or Doraemon. Open the lid and you will see the multiplication formula table.
It 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. The upper edge of the other long side of the outer box body is hinged to connect the box cover. The box cover is composed of two A narrow box lid hinged on the lid. 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.
After the 1990s, pencil cases began to emerge in endlessly, first with double-layer and large ones as the mainstream, and then after 2000 they began to be simple and practical, such as pencil cases and the like. The price range of the pencil case is about 8-20 yuan. The measurement standard is based on the structure and pattern. There is no brand to follow, while the pencil case is based on the style. For example, the transparent pencil case was once a very popular one. Kind, the price is 15-30 yuan.