3D printed backpack snap-fit clips

About this device

Keywords	3D printing, clip, fastener, snap-fit
Uses	hobbyism
Authors	Renata Putzig
Status	Prototype
Made?	No
Replicated?	No
Date published	2014
Date updated	2020-03-25
Affiliations	MTU
Materials	plastic
Cost	USD $ 1.00
SDGs	SDG09 Industry innovation and infrastructure

This Open Source Appropriate Technology has been designed but not yet tested — use at your own risk.

This Open Source Appropriate Technology has been prototyped.

This type of clip is found on a variety of items, most commonly backpacks, and work well. However, I have found that if you break one, it is difficult to find a replacement, and are overpriced (typically $2-6 for 1 set!). Since it is made of plastic and only plastic, I wanted to make a parametric OpenSCAD design. There are many designs for there out already, however few provided source code and even fewer were scalable.

Bill of Materials

• Filament of your preferred color
• Design files as found here

Tools needed for fabrication of the OSAT

• MOST Delta RepRap or similar RepRap 3-D printer
• Exacto knife or similar product for removing support structures

Technical Specifications and Assembly Instructions

• Print out the part. Be sure to generate supports for the print. Be prepared to spend time removing the the support structures.
• Print time: ~40 mins

Cost savings

• 3D printed part: ~50 cents (depending on size)
• Commercial part: $2-$6
• Minimum cost savings of 75%