Pen container with convenient capacity expansion

Abstract

The invention discloses a pen container with convenient capacity expansion. The pen container comprises a cylinder bottom with a cavity, a telescopic wall and a cylinder opening retaining ring which are sequentially arranged from bottom to top. The two ends of the telescopic wall are fixed to the cylinder bottom and the cylinder opening retaining ring correspondingly. The longitudinal section of the telescopic wall is in a continuous wave shape by sequentially and alternately connecting left side walls, circular arc peak walls and right side walls when the telescopic wall is stretched. The right side walls and circular arcs of the peak walls are in smooth transition. The left side walls intersect with the circular arcs of the peak walls, so that inflection points protruding towards the interior of the pen container are formed. The right side walls are in a straight line shape or an arc shape protruding towards the outside of the pen container, and the curvature radius of the arcs is much larger than the curvature radius of the circular arcs of the peak walls. Each left side wall is provided with a first circular arc and a second circular arc which protrude towards the outside of the pen container. The first circular arcs intersect with the circular arcs of the peak walls, and the inflection points are located at the intersections of the first circular arcs and the circular arcsof the peak walls. The curvature radius of the second circular arcs is much larger than the curvature radius of the circular arcs of the peak walls.

Description

technical field [0001] The invention relates to the field of stationery, more specifically, it relates to a pen holder which is convenient for capacity expansion. Background technique [0002] At present, the pen holder is the most common tool for placing pens. It is generally cylindrical and has various materials. The existing pen holder is generally composed of a base and a cylinder. The cylinder is fixed on the base. This cylinder can hold some pens , pencils and other stationery. For example, the Chinese patent application number is CN200720061467.2, and the name of the invention is a telescopic pen holder, including a pen holder, which is characterized in that there is an open lid on the pen holder, the lid has a body, a bottom or a rotating and fixed cover. , the spring is set along the bottom of the tube and is fixed on the outstretched base plate of the pen container, and the corresponding positioning hole for inserting the pen in the bottom of the cover tube is sui...

AI Technical Summary

Problems solved by technology

The advantage of this patented structure is that it has a cover, which makes it easy to take out the pen and is safe to use. However, the pen has different lengths, and the length of the pen holder in this patent is fixed. Most of its length is set for fountain pens and ballpoint pens. Pens with short lengths such as pencils that have been used for a period of time are obviously inappropriate. For this reason, it is necessary to develop a pen holder that can be used for pens of various lengths.

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