| 摘要 |
A pencil whose volume changes according to the volume of the content is provided to be conceived in consideration of interests and efficiency and to enable a user to wind the pencil case by pushing a convex structure. A structure material(a) made of iron or metal is coupled to a pencil body(b) made of cloth or leather. When a convex portion is pushed, it is wound. When the pencil case is wound, plates(d) for preventing the falling of pencils and erasers are installed on both ends of the pencil case which is transformed to have a cylindrical shape. Several receiving spaces are formed on the inner side of the pencil case. Pencils are inserted into the receiving space. The convex structure is used to wind the pencil case after a user inserts the pencils into the receiving space. |
