These buckles were designed to match as closely as possible the original design of those originally clamped on my backpack. Also, they were designed with 3D printing in mind, hence i had to make changes to the primary functional design in the aim to print it better.

Here is the original CAD file location :
https://github.com/bebenlebricolo/3D-printing/tree/master/Backpack%20Buckles%2055mm/CAD%20files

At the moment stuff is still a bit messy, however feel free to share, improve and fork this project as you like. Just remember to respect the CERN OHL license terms under which i've licensed the files.

http://www.ohwr.org/attachments/2388/cern_ohl_v_1_2.txt here is a link redirecting to the official hosting website of the license.

You may also find its trace in this video, posted by Thomas Sanladerer where you can see the supports removal. Thanks to him.
https://www.youtube.com/watch?v=OsQpxkLhDLk

---- Specifications ----
50 mm (actual 47 mm wide) x 55 mm Buckle - Replacement part - Decatlhon Forclaz 30 Litres
Both parts (male and female) + improved male part (2 more springs) and virtual assembly for validation purposes (design)

----EN----
I made a replacement part for the broken piece of my backpack. The original one have been overstressed and broke at the attachement area of the backpack strap.
Then i used my CAD software to make a replacement part, keeping as much as I could the original measures of the original part. I finally made a virtual assembly design to correct the little measurement mistakes, and make some improvements of the design.

---- Fr ----
J'ai conçu cette pièce en suivant les cotes de la pièce d'origine (qui provient d'un sac de randonnée de marque Décathlon, de la gamme Forclaz 30 L) pour remplacer la pièce d'origine (boucle femelle). Les deux boucles se veulent aussi proches que possible des pièces originales, en termes de design. J'ai également effectué un assemblage virtuel "à blanc" pour tester la conception, corriger les erreurs de mesures et effectuer quelques améliorations.