Patent ID: 7854559
Filing Date: 2010-12-21
Classification: B43K

Abstract:
1. A pen with double pen barrels comprising: two pen barrels that each having an opening side and two opposite sides that are beside the opening side and respectively disposed with a long slot for being assembled with two projecting plates arranged parallel of two parallel frames on a left side and a right side of a driving member so that the two pen barrels integrate with each other and slide upward and downward relatively; a click member disposed on top of each pen barrel while each pen barrel further includes a rectangular opening; a driving member having a frame, two toothed wheel members and two moveable members; wherein the frame includes a longitudinal long slot arranged on an upper part, two opposite toothed parts respectively disposed on edges of a front side and a back side thereof, two opposite stoppers respectively set under the long slot and on the front side and the back side, and a plurality of corresponding projecting plates arranged on a lower part for being assembled with the long slot of the pen barrel; the two toothed wheel members are respectively disposed on the front side and the back side of the frame, beside the long slot and each has a central shaft in which one end thereof is restricted to move upward and downward inside the longitudinal long slot of the frame while the other end of the central shaft is attached on the click member and is moved along with the click member synchronously; the two moveable members disposed on the front side and the back side of the frame, inside the two pen barrels and each moveable member having a toothed part arranged on an upper end, corresponding to and engaged with the toothed wheel member, a stopping part disposed under the toothed part for being locked with a stopper of the frame and a connection part arranged on the bottom end for connecting with a pen refill; two pen refills respectively disposed in the two pen barrels and connected with a bottom end of the moveable member of the driving member so as to move upward and downward along with the moveable member synchronously; two elastic members each supported between the frame and the click member; wherein when one of the click members is pressed, the click member drives the pen barrel to move downward so that the elastic member is compressed simultaneously and the toothed wheel member of the driving member is driven to move downward along the longitudinal long slot of the frame synchronously while the moveable member with the pen refill are also driven to move downward at the same time; when the stopping part of the moveable member locks with the stopper of the frame, the pen refill extends out of the pen barrel, being located to be in writing state; when the stopper is actuated and released from the stopping part, the pen barrel and the pen refill retract upward by elastic recovery force of the elastic member so that the pen refill retracts to be in storage state simultaneously while the pen barrel moves upward.