sling bag clip lock mechanism insert

thingiverse

I made this to solve an issue with "Sling Backpack Cross Body Shoulder Bag Messenger Daypack for Travel Gym School and Driving (Black)" from Amazon. The bag uses an open squared hook for connecting the strap to the bag on one end, presumably so you can easily take it on/off while - I don't know, wearing a seatbelt or parachute? Since nobody needs that feature, what ends up happening is the bag suddenly drops from your torso to the ground, to test the impact resistance of what's contained within, about once every 3 hours of wearing it. This fixes that, and only takes 14 minutes to print, then 2 minutes to figure out how to slide it in. Picture shows it (nearly invisible) inserted, after trimming (inspect the upper corner carefully and note the gap), and v1 that had insufficient space for insertion.