Patent ID: 8226314

Claim:
A press-action writing instrument comprising: a holding barrel comprising a first end, a second end and a window; a push button disposed at the first end of the holding barrel, wherein the push button allows a user to propel/repel to perform a linear motion; a rotation module connected with the push button, with the rotation module comprising: a driving part connected with the push button; and at least one rotation barrel installed in the holding barrel and located corresponding to the window, wherein the rotation barrel has a following part which can be driven by the driving part; an auxiliary spring connected with the rotation module; wherein when the user pushes the push button, the push button firstly performs a first stage, and then performs a second stage; wherein when the push button is performing the first stage, the driving part drives the following part, to drive the at least one rotation barrel to rotate; wherein when the push button is performing the second stage, the driving part departs from the following part, to make the at least one rotation barrel freely rotate; wherein when the user releases the push button, the push button performs a third stage after the second stage; wherein when the push button is performing the third stage, the driving part holds the following part, to make the at least one rotation barrel stop rotating; a writing element installed in the holding barrel, wherein the writing element has a writing end; a pressing module, wherein when the push button is propelled/repelled, the pressing module drives the writing end to protrude from or retract into the second end of the holding barrel; and a writing element spring disposed around the writing element.