Casio F-91W Watch Pocket Clip (Update)

thingiverse

I made this update to the clip quite some time ago but failed to upload the revised design earlier. The bobby pin style was simply too loose to hold well onto my vest pocket. It liked to climb up and out of my pocket. I tweaked it a bit to increase the surface area that is clamping on the cloth so that it doesn't budge (also it looks like a dragon), and it's been working perfectly for nearly a year. What you're seeing is a recent reprint because the first print of the new design was done on a less well-tuned printer and delaminated after being tortured at work for several months. The new print was on an Ender 3 with solid infill, grey hatchbox pla. Seems quite robust to me and should last at least another year, and there was basically no finishing. Waited for the plate to cool down and popped right off, ready to use. If you tried the old version, I can highly recommend the new version if you've had trouble with it staying in place on a t-shirt or polo pocket. If you have a thicker pocket you want to clip it to like a jacket or something, the bobby pin style may work better. I wanted to be able to check the time at work without using my phone, but hated the feeling of a strap on my wrist. Thus, I was inspired to turn my old Casio F-91W into a pocket watch. I figured a chain would be excessive, so this simple clip was born after a few doodles. It's a bobby pin style clip with a pair of latches that snap onto the strap pins of the watch, and a small tab at the top gives you a place to grab it from which, for me, is quite nicely sized. The whole thing is 18mm tall (the width of the strap slot) and took me around 50 minutes to print with 3 perimeter walls and 30% wiggle infill aligned along the part, 0.4mm nozzle and nearly default settings in Simplify3D. Due to it just being a extruded shape, you can stop the print prematurely and the result will still work alright, though it may slide along the pins. There's also an svg for the profile used included, if you wanted to adjust this for a different type of watch. There's the distance between the pin latches and the depth of the back cover recess defined by the svg, and then extrude the profile using whatever modeling software will accept an svg to the width of the pins. I personally used Inkscape and FreeCAD, but you do you mate. Micrometer highly recommended for getting the best possible fit. The hooks should go a bit around the pin in order to hold securely. This will probably require some shaving/filing/sanding of the entire part to ensure it clips on to the watch and your pocket smoothly. Though somewhat unavoidable, I'd recommend randomizing the layer start points to minimize the amount of webbing in between the two arms of the clip, but some careful work with a craft knife or pin files should make the whole thing quite smooth. To insert the watch, first remove the straps by pushing on the right end (looking at the face) of the pins to remove them, then replace them after taking the straps off. Then, slot the top pin into the latch near the tab and press the bottom side of the watch until it clicks into place. *It will be somewhat difficult to remove the watch afterwards, so be careful about how you put it in.* If all goes well, the finished product should be quite robust. Indeed, it may have too strong of a grip to fit on your clothes without needing a lot of force. In this case, use a pencil or something to hold the end of the clip apart, then pass a lighter underneath the wiggly side to soften the plastic and loosen its grip as needed.