Patent ID: 7530751
Filing Date: 2009-05-12
Classification: B43K

Abstract:
1. A writing implement having a longitudinal axis, comprising an essentially tubular body, a retractable nib mounted at an open end of this body, an actuator located at the opposite end of this body, a retractor means for retracting said nib and connecting the nib to the actuator through said body and transferring a movement applied to the actuator into a displacement of said nib along the longitudinal axis between a retracted position and an extended position, a guard member of said open end comprising a plurality of guard petals, each mounted so as to be able to move between an open position and a closed position about a pivot axis tangent to a circle concentric with the longitudinal axis, and a movement transfer means integral with said body, synchronized by said retractor means, and connected to said guard petals to transfer the movement applied to the actuator into a pivoting movement of said guard petals; in which implement said retractor means consists of a cylindrical cam comprising a first helix read by a first cam feeler integral with the body, and a second helix read by a second cam feeler integral with said nib.