Patent ID: 6761495
Filing Date: 2004-07-13
Classification: B43K

Abstract:
An improved structure of a pen comprising a cap mounting, a first and a second compression springs, a refill, and a casing, wherein the casing has an upper conic casing with a lower edge having a protruded peg at the lateral side of the edge, the conic casing is extended downward to form a cylindrical tube provided with appropriate length slot so that the casing is extendable externally and compressible internally, the lower section of the hollow casing has a tapered holding region being mounted with the first compression spring, the refill is positioned within the casing and is urged by the compression spring, the external edge of the conic casing is mounted with the second compression spring for the holding and urging of the cap mounting having a clip, and the inner edge of the cap mounting is provided with an upper circular groove and a lower circular groove for the combination with the two protruded pegs, and a vertical sliding rail is positioned between the two circular grooves, the two protruded pegs at the two lateral sides of the conic casing are in engagement with the lower circular engaging groove; whereby the slidably mounting of the protruded pegs with the upper and lower circular grooves can provide a rapid method of securing the refill while writing or to retract the refill.