Patent ID: 8500353

Claim:
A draw-out type solid marker, comprising: a shell; a rotary member rotatably coupled to a rear end of the shell; a movable member coupled to the rotary member in the shell and movable forward/backward from the shell according to rotation of the rotary member; a solid core connected to a front portion of the movable member and movable forward/backward with the movable member, the solid core having an elliptical cross-sectional shape; and a cap removably coupled to a front end of the shell, the cap formed with one open end and having an inner circumference with a elliptical shape corresponding to the elliptical cross-sectional shape of the solid core, and a clip formed on an outer circumference of the cap, wherein the shell comprises: a rotation supporting portion with an inner circumference where the rotary member is rotatably supported; and an insertion portion where the solid core is inserted, the insertion portion connected to the rotation supporting portion having the rear end to form the shell, and the insertion portion having an inner circumference formed in an elliptical shape corresponding to the elliptical cross-sectional shape of the solid core, wherein the rotary member comprises: a large-diameter portion rotatably supported in the rotary supporting portion of the shell; a small-diameter portion having a smaller diameter than the large-diameter portion, the small-diameter portion integrally extending forward with respect to the shell from one end of the large-diameter portion, the small-diameter having a rotation protrusion; and a cap connector integrally extending from the other end of the large-diameter portion and having an outer circumference corresponding to the inner circumference of the cap such that the cap is removably coupled to the outer circumference of the cap connector, wherein the movable member comprises: a threaded shaft formed in a bar shape, installed on an axis of the rotary member, and having a thread engaged with the rotation protrusion on an outer circumference of the shaft; and a core support having a cross-section corresponding to the insertion portion of the shell, integrally formed at one end of the threaded shaft, and receiving an upper end portion of the solid core, wherein each of an outer circumference of the shell and the outer circumference of the cap has an elliptical shape corresponding to the elliptical cross-sectional shape of the solid core.