Running Bib Clip

thingiverse

Updated to fit all bibs and now has a slot in the pin with more spring action, making pins even better. You'll love my pins - I promise that much. The tolerances are deliberately tight on purpose, so a very light sanding of the hole in the top piece can custom fit it to your preferred clothing thickness. As a new runner and 3D printer owner, using the same safety pins on kids' clothes for racing seemed silly. Taking inspiration from attachments I have on tarps, I created this two-part clip design. Place the part with the post inside your shirt, press your bib onto the post, allowing some of your shirt to come through the hole pressed out by the pin. Then, put the other piece outside and it'll capture the bit of shirt with your bib stuck between them. So, outer piece, bib, shirt, inner piece - that's how you do it. You can also try the opposite way, but be careful not to get poked by the pins. I made them a little long on purpose so they accommodate thicker shirts. The outer piece has a step on one side, which helps give the cloth of your shirt a place to expand into and lock down securely. The edges are rounded for easy printing on any printer. The glass side will be against your skin, providing a smooth non-irritating surface. My tarps' attachments have oval holes and pins with a slot that twist to lock them down, but I didn't want to risk twisting clips on my shirts, so this design is just a push-through. It seems to work fine - they held up during my first 5K without any issues. The pin versus the hole is deliberately tight, allowing you to take some sandpaper and smooth out the hole to reduce the risk of messing up your shirt and tailor the opening to your shirts' thickness. For me, a quick hit with 220 grit does the trick and makes a perfect fit. I recently found out there's a commercial product that does pretty much the same thing, but at $0.36 a set of four printed in PLA versus a few dollars, I'll stick with printing my own. If I lose a piece, no big deal - I won't be running that many races a year anyway. Print Settings: Printer: MendelMax 3 Rafts: No Supports: No Resolution: 0.25 or whatever you like Infill: 30% seems to produce a strong piece Notes: I printed mine with 4 perimeters, 3 top and 3 bottom layers because I wanted the pins to be strong enough for repeated usage. Post-Printing: A light sanding on the hole and pin will smooth things out for your shirt and allow you to custom fit the pieces to the weight of your running shirt (or shorts if you want to pin your bib there). How I Designed This: Designed in Studio Max 12 (academy edition) in a few minutes. The initial design worked fine, but I went back and tesselated and smoothed it a bit to make it prettier. Your printed pins will have rounder edges than mine, which was my first version showing the photo holding a bib to one of my UA running shirts.