rotation pen / pen

This design is inspired from the inconvenience of the books’ automatically merger in people’s daily life.Two pages of the book will automatically turn back without the hands, by means of getting the buckle of the rotary pen stuck in one page, and turning the pen to another page. The principle is that the buckle attached to the pen’s axis, which has a large and a small circle, and the large one encircles the small one, to meet the requirement of the rotation.