If, like a large percentage of the population of Instructables, you wear a messenger bag and ride a bike, you'll be familiar with the problem of the bag slipping off your back and ending up under one armpit as seen below. This is a pocket-sized solution that you can quite easily make for free, or for at most a few quid. This is also my entry for the Pocket Sized competition.
Step 1: Materials
You will need:
- String or webbing, about 50cm/20" should be enough
- Two key clips (you could get away with one but it would make the PSMBSOSD slower to assemble)
- A split ring (again, not entirely essential- you could replace with a small amount of string or thread)
- A messenger bag
- Optional- a credit card sized card, sturdy business card or just a rectangle of flat plastic
- A lighter (if you are using synthetic string and want to seal the ends)
Step 2: Preparing the Patient
Attach the split ring to the bag at or around the point where the strap is attached to the bag. You can just poke two small holes and thread the ring through- the nylony fabric this bag is made of won't unpick if you do that, but YMMV (Your Messenger-bag May Vary).
Step 3: Start the PSMBSOSD
If you are only using one key clip, you can tie a loop in the end of the string and feed that into the split ring or just tie/untie the knot every time you want to attach or remove the PSMBSOSD.
Step 4: Do You Measure Up?
Step 5: Knot Again...
Step 6: You're All Done!
Clip bottom end to split ring on bag, put on bag, pass top end under armpit and loop around bag strap, and clip top end to the string to form a loop.
The PSMBSOSD has been rigorously tested on at least two of my commutes to work over a combined urban/extra-urban cycle of approximately one mile. It prevents the bag from slipping.
Step 7: Enhancements
Well, to justify the Pocket Sized entry you have to be able to put it in your pocket, and if you put a length of string in your pocket it gets tangled or ends up dangling out. That's why I invented the Handy Anti-Dangle Tangle Preventor, or HADTP. To make a HADTP, take your gift card/library card/business card/rectangle, and cut a triangular notch about 1cm deep into each of the short ends. Wrap the PSMBSOSD around the HADTP, and secure the ends together. This has been exhaustively tested by putting in my trouser pocket and jogging up and down the stairs- when I took it back out it was tangle- and dangle-free.
Also, the strap length adjuster on my bag is in just the right place to stop the PSMBSOSD from sliding around. If your bag doesn't have this handy attribute you could sew a couple of buttons or studs onto the relevant part of the strap to stop this happening.
If you made yours out of webbing rather than string, you could incorporate those pinch-release buckles, because everyone loves those things, and then you could attach/release the PSMBSOSD even more easily. They can often be found on unwanted or charity shop-bought bags, or on free lanyards from corporate events and games expos, etc.
OK, so if you've read to this point I guess you liked (or just tolerated) my Instructable. I've told people off for asking for competition votes so it would be hypocritical of me to do so here, so I'll just say this is an entry in the Pocket Sized competition and my first competition entry to date.