Replacement Part for Lionto Dog Transport Box

Our little Bolonka girl owns multiple of these foldable Lionto transport boxes you can get from Amazon or Fressnapf:

After a certain time in each box the outer part of at least one of the two used spring-based connecting segments broke. To bring these boxes back to life, I measured both parts, tried to rebuild the needed parts and stay as close as possible to the original sketch. However, for the inner part I did some minor changes to make it printable without any additional support. 

Here you can see the two parts including the broken outer part:

And here are some renderings of the designed parts:

Finally, the printed parts can be seen here:

I printed these parts with XPETG in matte red from Extrudr without any support and brim on a Bambulab P1P. I used 25% of gyroid infill with a layer height of 0.2mm.

You can see the results in the attached images including the mounted part.

Additional information

I added two STL files for the inner part. One is more or less the original part with respect to the shape and dimensions. After printing it I decided to introduce some changes:

• I increased the outer diameter of the middle section, since the original size was to wobbly for my personal taste. 
• I introduced a cutout for the shape of the included spring.

With these two changes the assebly of the inner part and the included spring is great with a snug fit. It made the process of assembling these parts a less pain in the a**. :) 

Note: For best results just orient the inner part to be printed head down.