RETRACTABLE PEN

摘要

PURPOSE: A retractable pen is provided to extend length of a extension part and enlarge diameters. CONSTITUTION: A retractable pen comprises a casing(10), an ink cartridge(20), a rotating ring(30), a fixing ring(40) and a knob(60). The front and rear sides of the casing are opened. The ink cartridge is accepted inside the casing and a pen point(21) is connected to the front part and an extension part(23) is installed in the backend. The rotary ring is inserted into the extension part of the ink cartridge and an one-way ratchet(31) is projected along the circumference at the back end. The fixing ring is inserted into the extension part(23) of the ink cartridge. The bidirectional gears(41) are formed along the front end circumference so that the fixing ring can be slid. The knob is combined with the back end of the extension part of the ink cartridge.