a pen

Abstract

The invention relates to a pen, which comprises a pen barrel and a refill which are slidably connected, and also comprises a limiting piece for limiting the position of the refill. The limiting piece meets the following conditions that in the turnover process from the forward placement of the pen barrel to the reverse placement of the pen barrel, the limiting piece is changed to a second structure from a first structure under the action of gravity, otherwise, in the turnover process from the reverse placement of the pen barrel to the forward placement of the pen barrel, the limiting piece is changed to the first structure from the second structure under the action of gravity; when the limiting piece is of the first structure, the refill is limited in a writing position; when the limiting piece is of the second structure, the refill can retract at a distance greater than the predetermined length to the tail end of the pen barrel by taking the writing position as a starting point. Compared with the prior art, the pen provided by the invention has the advantages that the structure is simple and reasonable, and the pen is safe and reliable to use; when a nib of the pen trends toward the vertical upward direction, the nib can retract into the pen barrel.

Description

technical field [0001] The solution of the invention relates to the field of pen manufacture. Background technique [0002] The pen is an important writing tool with a long history. It has gone through many changes from its invention to the present. The pen generally includes a pen tube, a pen core, and the pen tube is a hollow structure. The head of the pen core is the nib for writing. , the pen core is plugged into the hollow structure of the pen tube, so that the pen core and the pen tube form a sliding connection; when writing, the pen head of the pen core extends out of the pen tube to a preset length; but there are some shortcomings in the prior art pen, That is, the pen often causes harm to people during use. Since the tip of the pen is very sharp, when the pen ends the writing state and is placed with the tip facing upwards, the pen has a certain degree of danger. This situation is very dangerous for children. Especially outstanding, children not only regard pen as ...

AI Technical Summary

Problems solved by technology

[0002] The pen is an important writing tool with a long history. It has gone through many changes from its invention to the present. The pen generally includes a pen tube, a pen core, and the pen tube is a hollow structure. The head of the pen core is the nib for writing. , the pen core is plugged into the hollow structure of the pen tube, so that the pen core and the pen tube form a sliding connection; when writing, the pen head of the pen core extends out of the pen tube to a preset length; but there are some shortcomings in the prior art pen, That is, the pen often causes harm to people during use. Since the tip of the pen is very sharp, when the pen ends the writing state and is placed with the tip facing upwards, the pen has a certain degree of danger. This situation is very dangerous for children. Especially prominent, children not only use the pen as a writing tool, but also use the pen as a toy. When the child runs with the pen and the tip of the pen is facing up, once the child falls, the pen tip will hurt the child.

Images