Retractable pen

Abstract

A telescopic pen is composed of upper and lower pen tubes, internal slide sleeve, pen core, and spring. It features that said upper and lower pen tubes can be axially and relatively slided to pressing or releasing the pen core, so the pen core can be pushed out or withdrawn back. Its advantage is long service life.

Description

technical field [0001] The invention relates to the technical field of pen tools, especially the push type retractable pen. Background technique [0002] With the advancement of science and technology and the diversification of human activities, the development of pens tends to be diversified. Among many pens, the push-type retractable pen has become a long-lasting product. The reason for this lies in the push-type The nib of the ballpoint pen has the function of self-shrinking, and there is no need to match the pen cap separately, so there are no disadvantages such as loss of the cap of the ballpoint pen and inability to hold and carry it. In the Chinese utility model patent whose patent number is 01238915.3, the inventor's structure is that it includes an upper pen tube with a cap on the top of the upper pen tube. There is a spring between the pen core and the convex part of the pen core and the lower pen tube. It is characterized in that the upper pen tube has a slider i...

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the upper and lower pen tubes are directly connected, and the stress at the tip of the pen is relatively concentrated, which may easily cause the tip of the pen to break. In addition, the volume is relatively large, and the advantages of small size and easy portability of the telescopic pen are not fully utilized; There is an intermediate block between the sliders, the design is not simple and clear enough, and again, sometimes after writing, forget to operate to retract the pen core into the pen barrel, and directly hang the pen buckle on the pocket, which will cause the ink to contaminate the clothes , so its structure still needs to be improved

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