Writing utensil with self-sealing structure

Abstract

A writing instrument with auto-sealing structure is provided. Hinge portions of a retainer are provided with a raised pawl serving as a stopper capable of preventing a hinge shaft from over-pivoting.As a nib is completely sealed, drying of ink can be more effectively prevented. The writing instrument has the auto-sealing structure and comprises: a main housing having a front opening in one end; astriker connected to the other end of the main housing, wherein the nib is extended out of or retracted into the front opening through pushing; a barrel, wherein the barrel and a spring are jointly inserted into the main housing when the striker and the nib are connected respectively to the two ends of the barrel; at least one O-shaped ring fixed in the main housing; the retainer fixedly mountedin the main housing and having one end covered with the O-shaped ring; a spherical door pivoted to the retainer, wherein the spherical door allows the nib to be extended or sealed through pivoting ofthe spherical door, and the spherical door includes a hinge shaft in sector shape, the hinge portions of the retainer are provided with the raised pawls that are raised inward to limit the pivoting range of the hinge shaft, and the hinge shaft is positioned in the hinge portions in pivoting manner.

Description

technical field [0001] The present invention relates to a writing utensil with a self-sealing structure, more particularly, to a writing utensil such as a ballpoint pen, a highlight pen, a roller pen, a board marker, an oily marker, a magic pen, a plastic pen, or a marker , has an automatic sealing structure that allows the retractable nib to protrude from the front opening of the writing utensil only when the writing utensil is in use, and the nib is sealed in the writing utensil when not in use. Background technique [0002] Open writing instruments having a writing member whose ink does not dry can be broadly classified into two types. In the first category, the ink of the writing member is made difficult to dry by modifying the ink or air pores of the writing member. In an additional second category, writing instruments are provided with an anti-drying unit in the body. [0003] For example, writing implements of the first category include marker pens using so-called "...

AI Technical Summary

Problems solved by technology

[0008] However, if figure 2 As shown, when returning to the original position, the spherical door 90 should be positioned on the center line, that is, the initial position, but it often occurs that the pivoting occurs from the blocking position by more than 90 degrees or more

Therefore, there arises a problem that the nib 11 is not tightly sealed by the ball gate 90, resulting in a defect due to occurrence of ink drying.

Images