Patent ID: 8348536

Claim:
A rotary-type retractable writing implement with an anti-drying device comprising: a nib cartridge having a writing nib; an intermediate connection member having a slit along which the nib cartridge moves in the longitudinal direction in the intermediate connection member; a lower-shaft housing fixedly coupled with the intermediate connection member and having a nib hole through which the nib is retractably advanced; an upper-shaft housing having a thread along which the nib cartridge received in the intermediate connection member moves as the intermediate connection member and the lower-shaft housing are rotated together; and a ball shutter disposed in the lower-shaft housing and configured to open a passage for the nib when the nib is advanced in response to the longitudinal movement of the nib cartridge and to close the passage for the nib when the nib is retracted, such that the nib is received in the closed space, wherein as the intermediate connection member and the lower-shaft housing are rotated together, the nib cartridge moves downwards to cause the nib to protrude to the outside from the lower-shaft housing, wherein the lower-shaft housing comprises: a groove provided in one side thereof at the position corresponding to the position of the coupling rim of the intermediate connection member and engaged with the coupling rim to create a secure coupling between the lower-shaft housing and the intermediate connection member; a fixing step provided on an inner wall of the other side thereof such that an upper ring of the ball shutter is fixedly attached thereto; and a spring holding protrusion provided a certain distance away from the fixing step and against which a second spring is held by a step on an outer surface of the ball shutter so that opposite ends of the second spring are respectively engaged with the spring holding protrusion and the step of the ball shutter.