I used to think that it was impossible to print a usable normal-sized click pen structure through a 3D printer.
Bambu printer with a 0.2mm nozzle, and its accuracy is indeed a bit surprising to me.

我曾经觉得使用3D打印机实现一个正常大小的按压式圆珠笔的结构，这是不可能的。拓竹配0.2mm的喷嘴，这个精度确实有点让我惊讶!

As a 3D printing enthusiast, it's cool to have a nice 3D printed ballpen. This is a pure 3D printed retractable ballpen, with a lovely rounded shape.

The printing accuracy is key to the mechanism of the click pen. So it should use a 0.2mm nozzle, and with 0.1mm Layer height. Two plates are suggested for better quality.

It uses Uniball UMR-85N / UMR-83N as refill. and it only need a common (0.4*5*21) spring for ball pen.

按压式圆珠笔的机械结构，曾使我非常着迷。

作为一个3D打印的爱好者，如果有一只这样的3D打印圆珠笔，应该是一件很酷的事。

这支笔有着圆滚滚，胖墩墩的可爱外形，长度只有12厘米，比普通的圆珠笔还短将近3厘米，携带也很方便。

打印精度是按压式圆珠笔能否丝滑的关键，所以这里要使用0.2mm的喷嘴，层高设置为0.1mm。建议零件和外壳分别使用两块板布局以提高质量。

笔芯使用三菱Uniball UMR-85N/UMR-83N。只需要一个0.4*5*21的圆珠笔弹簧。