Patent ID: 6914596

Claim:
A retractable stylus, applied in a Personal Digital Assistant (PDA), comprising: a pen shaft having a release button on a circumferential periphery thereof; a pen body connected to the pen shaft and having an opening in a circumferential periphery thereof, wherein the opening is used for holding the release button at a first position; a spring situated inside the pen body and two ends of the spring respectively touching the pen shaft and the pen body for providing a force to extend the stylus; and a tip attached to an end of the pen body, the tip being adapted for tapping icons and buttons on the PDA; wherein when an external force is applied to the pen shaft downward, the spring is compressed until the opening holds the release button, thus the stylus is shortened; when the release button is pressed and set free from the opening, the spring elasticity ejects the pen shaft upward.