Patent ID: 7066673

Claim:
A pen comprising: a pen body having a first end and a second end, said pen body having a slot at said first end extending into an interior of said pen body; a ball tip extending outwardly of said second end of said pen body, said ball tip having a refill element extending outwardly therefrom; a reversible accessory received in said slot of said pen body, said reversible accessory having a functional element at one end, said reversible accessory having a first terminal connector at said one end and a second terminal connector at an opposite end thereof, said first terminal connector and said second terminal connector engageable with said slot of said pen body such that said functional element is located within said interior of said pen body when said second terminal connector engages said slot and such that said function element extends outwardly of said interior of said pen body when said second terminal connector engages said slot, said functional element being cooperative with an elastic member in said reversible accessory, said reversible accessory having an inner slide structure, said functional element positioned at one end of said inner slide structure, said functional element having a protruding button extending through said inner slide structure, said inner slide structure having an cannular slot formed therein with a guide slot communicating with said cannular slot on one side of said inner slide structure, said protruding button slidable along said guide slot, said inner slide structure positioned adjacent said second terminal connector of said reversible accessory, said elastic member positioned adjacent a fixed point in said cannular slot so as to urge said functional element inwardly of said slide structure, said protruding button slidable along said guide slot so as to cause said functional element outwardly of said inner slide structure.