Multicolor writing instrument with automatic return function
OwnerKwang Ju CHEONinventor
Life of this patent
Estimating the term…
Abstract
A multicolor writing instrument with an automatic return function includes a lower housing having a hollow cylindrical shape; an upper housing connected to an upper portion of the lower housing and formed with locking steps; a clip member hingedly provided on the upper housing so as to be movable about a hinge shaft; a coil spring resiliently installed between the clip member and the upper housing; pen cores filled with at least two different color inks; knobs having ends fitted into the respective pen cores; return springs resiliently installed between the pen cores and the knobs; and a return member formed integrally with the clip member on one side of the hinge shaft and toward the respective knobs.
Claims1
A multicolor writing instrument with an automatic return function, comprising:
- a lower housing (10) having a hollow cylindrical shape and having a nib passing through-hole (11) formed therethrough at a tip of the lower housing;
- an upper housing (20) connected to an upper portion of the lower housing (10) and having guide holes (21) and locking steps (22) formed respectively inside the guide holes;
- a clip member (30) hingedly provided on the upper housing (20) so as to be movable about a hinge shaft (31);
- a coil spring (40) resiliently installed between the clip member (30) and the upper housing (20);
- pen cores (50) accommodated in the upper housing (20) and the lower housing (10) and filled with at least two different color inks;
- knobs (60) installed to be slidably moved under guidance of the guide holes (21) and having ends fitted into the respective pen cores (50), each of the knobs having a top locking protrusion (61) caught by the locking steps (22) and two unlocking portions (62, 63);
- return springs (70) resiliently installed between the pen cores (50) and the knobs (60);
- and
- a return member (80) formed integrally with the clip member (30) on one side of the hinge shaft (31) and toward the respective knobs (60) so that when a lower end of the clip member (30) is pivoted, the return member (80) returns the respective knobs (60) and pen cores (50),
- wherein an auxiliary member (90) is further provided between the return member (80) and the knobs (60) so as to simultaneously press the knobs (60) when the return member (80) is pivoted in an upper space of the upper housing (20), and
- wherein the auxiliary member (90) has a guide groove (92) formed between posts (91) so that the auxiliary member may be operated with the return member (80) fitted into the guide groove, and the posts (91) are formed with guide channels (93) to guide a vertical movement of the auxiliary member within the upper housing (20).
Dependencies are inferred from the claim text.