Slim Twisted ClickPen, Retractable Pen 三面旋转圆珠笔

This is the most elegant retractable click pen I've ever made, with a slim body and a twisted Tri-Faces design that makes it very comfortable to hold.

Using a Bambu printer with a 0.2mm nozzle, it can be printed without supports (requiring a small amount of glue applied to the board). Thanks to the precision of the Bambu printer, using Polylite PLA Pro can achieve perfect alignment of curves. Using other filaments may result in imperfect alignment of curves. You can choose to print small washers of different thicknesses from the second plate to align the pen body. (When using a washer, you may need to use the extension part to extend the length of the refill long enough.)

The most interesting aspect of this design lies in the use of triangular buttons, which increases the design difficulty. Due to the structural limitations of click pens, buttons are usually restricted to being round. To achieve a triangular button that is consistent with the pen body, the design employs a method where the button is printed together with the pen body. 

Use a uniball-83/85N as a refill.

Both 0.5x5x20 and 0.5x5x25 springs can be used, with slightly different hand feel.