Interesting self-telescopic pen

The utility model relates to an interesting self-telescopic pen which belongs to the technical field of stationery article. The utility model comprises a rod cover and a pen core which is arranged in the rod cover, wherein the rod cover is formed by mutually buckling a left and a right casings, a spring is sheathed on the pen core, a contact component is also arranged in the rod cover, one end of the pen core is connected to the contact component, a spring sheet is arranged on one side of the contact component, a protruded button is fixed on the spring sheet, the button extends from a slide groove which is arranged in the rod cover to the outside of the rod cover and a clamping point is arranged on the inner side of the slide groove. After the utility model adopts the technical scheme, the structure of the self-telescopic device for pens is simplified. Thereby, the size of products is reduced. The utility model can be used for manufacturing interesting small-sized pens for example pens which have decorative toy effect can be formed by the combination of the utility model and small decorations.