Opening and closing device of uncovered retractable pen and uncovered retractable pen

Abstract

This invention relates to an open and close device of an uncovered flexible pen. The device is arranged inside the hollow pen pipe, characterized in that it comprises hollow basement with upper and lower openings, cover plate mount, a sealing parts and elastic member; when the writing end moving downward, the device will decent to an arc projecting place in the pipe, and the cover plate mount willmove upward until outside the upper opening of the hollow basement to open the cover plate, then the writing end will projecting the supporting pipe. The device uses two-section cover opening designtoclose and open the writing end.

Description

technical field [0001] The invention relates to an opening and closing device of a capless telescopic ink pen, in particular to an opening and closing device of a capless telescopic ink pen designed by two-stage cap opening. Background technique [0002] General ink pens can be divided into water-based ink pens or oil-based ink pens according to the different inks used. In order to avoid the ink at the writing end being exposed to the air for a long time to dry up and unable to write, it is generally common practice to use an outer cover type pen cap to seal the writing end of the ink pen to prevent the ink from drying up. However, during the use of the ink pen with the outer cover type pen cap, it is very inconvenient to close or open the writing end with both hands. The ink dries up, causing a lot of inconvenience to the user. In order to further solve the various inconveniences of the ink pens with the above-mentioned outer cover type pen cap, a retractable ink pen with...

AI Technical Summary

Problems solved by technology

[0008] Yet there are still many problems to be solved in the opening and closing device of the known capless telescopic ink pen

First of all, the assembly process of the opening and closing device of the conventional capless retractable ink pen must use the plastic thin wire 169 to pass through the groove 149 of the hollow base 141, the cover piece 163 and the groove 167, and the assembly process is not only complicated but also time-consuming. At the same time, it is difficult to speed up the process when mass production

Secondly, after a period of use, the thin plastic wire 169 is likely to affect the opening and closing effect of the opening and closing device due to elastic fatigue.

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