Hands-Free Wall-Mounted Hand Sanitizer Dispenser

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Introduction: Hands-Free Wall-Mounted Hand Sanitizer Dispenser

About: Analog maker dabbling in digital manufacture

We have a stock of hand sanitizer inside the front entrance of our home thanks to COVID-19, but a hands-free one outside is ideal as it allows sanitizing before coming in contact with the house. So we built a simple wall-mounted one that can be built from string and wood scraps or 3D printed. It works perfectly and has proved very handy for our family which includes two students entering Grade 10 & 12 this Fall.

Step 1: Design and 3D Print

The idea is simple: provide a means of depressing the plunger of a hand sanitizer dispenser with your foot. By attaching it to the wall, no support structure is needed. This design (made with Fusion360) has a mount for the hand sanitizer and a pedal. They're connected with some strong string. Print both parts below (I used an Ender 3). I designed this one for a snug fit for a bottle we owned - a 320 ml/11 fl oz short round bottle. But it can be scaled in the slicer to accommodate whatever similar bottle you own, or you can play with the designs yourself through these links: wall mount, pedal.

Both parts can be printed at the same time with no support necessary. The combined print (wall mount and pedal) uses 108 g of filament and takes a little under 14 hrs at an infill density of 20% and a layer height of 0.2 mm.

Step 2: Assemble

Drill two holes (larger than the string diameter) through either side of the plunger. Get some strong string and thread it through those holes. Pass each end down through the tubes either side of the mount, and through the outside holes in the pedal. Tie knots under the pedal to secure the string. Drive screws through the holes in the mount and into the wall at a height you like. Adjust the string length as necessary by adjusting the knot positions under the pedal, and you're ready to go! Dispense by pressing down on the pedal while your hands are under the nozzle.

I used some braided nylon cord from an old blind. But the string is non-critical - use whatever you have on hand, it just needs to be strong and not too stretchy.

Note: this mount is for a bottle that is 3" (76 mm) in diameter. If you have a larger or smaller bottle, that's OK. Just rescale the wall mount print in your slicer to match the bottle you have (e.g. for a 4" bottle, scale by 133%, or for a 2.4" one, by 80%). Just make sure you buy a dispenser bottle which is round and has one of the large plungers (like this one). Or just loop the string over the plunger head (see next step).

For a more robust pedal, just get a piece of plywood and drill a couple of holes in one edge. Pass the cord through and knot.

Step 3: No 3D Printer?

No problem. Here's how we made a prototype out of scrap wood, string and a piece of tubing. It works just as well as the 3D printed one, though it looks a bit less slick. We cut a hole the same size as the base of the bottle in a piece of 3/4" thick wood using a spade bit and a jigsaw. We glued two triangles underneath to brace the shelf and support the bottle. We trimmed it down a bit to make it a bit slimmer. We drilled two guide holes in the shelf, and looped the string around the plunger, through the guide hole, through the tubing, and back up the other side. Another loop is secured over the plunger. We realized after making this one that the larger plunger heads would be easier for securing the string on the plunger, which is why the 3D printed one uses a different bottle.

Step 4: Make One!

Go make one yourself - I'd love to see your takes on the design.

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    25 Discussions

    1
    7skyies
    7skyies

    10 days ago

    Wow, cheap and easy. Thanks a lot for sharing.

    1
    misc
    misc

    11 days ago

    This is fantastic! Would you be willing to share the Fusion files as well?

    0
    makendo
    makendo

    Reply 11 days ago

    Sure; the wall mount/pedal files are linked in Step 1

    0
    LarryG7
    LarryG7

    13 days ago

    The idea of a no-touch dispenser sounds great. Except that several studies of where the most bacteria were in public bathrooms have shown that the place with the highest numbers was at the hands-free air dryers. So perhaps this solution isn't a solution after all. :)

    0
    makendo
    makendo

    Reply 12 days ago

    Agreed, this is not a solution to the hand-drying conundrum you pose

    0
    LarryG7
    LarryG7

    Reply 12 days ago

    .Never said it was.

    0
    ziqfriq.
    ziqfriq.

    Reply 12 days ago

    Relevant only if you compared counts at hands-free hand dryers with non hands-free. Probably explained by poor or careless washing techniques prior to drying.

    0
    LarryG7
    LarryG7

    Reply 12 days ago

    Duh.

    1
    ziqfriq.
    ziqfriq.

    12 days ago

    Very clever KISS solution. No electronics needed!

    4
    NirL
    NirL

    13 days ago

    Finally a simple solution!!! great job! I love how you don't need any sensors, arduino, programming or anything too sophisticated.. just a good idea. great job!

    1
    jc_0142
    jc_0142

    Reply 13 days ago

    Agree, a great simple idea. 👏👏 Just follow the KISS rule. No batteries, nothing fancy. I would even screw an empty tin can to the wall to hold the bottle. I'll also use some used ball point pen duct taped to each side to guide the strings as well as the foot paddle. That's as green as you can get. 👍

    0
    makendo
    makendo

    Reply 13 days ago

    thanks! Yeah the prototype was working an hour after I had the idea, so certainly straightforward

    0
    biohazarus
    biohazarus

    13 days ago

    Very nice and simple, but may I ask why you cannot push with your hand? I mean, the sanitizer will clean off anything that would have been catch from the nozzle?
    I would keep the holder and not bother with the foot option.

    0
    makendo
    makendo

    Reply 13 days ago

    If you're not fussed about it being hands-free, sure

    0
    nedchurch
    nedchurch

    Reply 13 days ago

    Great idea ... outside our local supermarket they have the hand operated pump bottle and it's really hard to use when you have a bag of groceries under each arm without putting everything down. I might make them one of these!

    0
    makendo
    makendo

    Reply 13 days ago

    Great idea, though for constant use I'd replace the 3D printed pedal with a piece of plywood (drill a couple of holes in it, knot underneath) and maybe use some heftier string

    1
    BethP69
    BethP69

    13 days ago

    quite brilliant.

    Thinking of ways to macgyver this with stuff on hand. Bicycle water bottle cage. wire or duct tape. chop up a straw. good string (paracord?), scrap of wood.

    My spouse might not let me do a finagled version on the front porch, maybe at the back entrance. Our mail and package delivery folks would appreciate it though, so maybe I'll argue. ;)

    0
    makendo
    makendo

    Reply 13 days ago

    Thanks. It's basically just a shelf with a couple of holes in it, so a fancy version is completely possible.

    1
    Iceland73
    Iceland73

    14 days ago

    Clever. As soon as my printer is free I'll be making one. Thanks!

    0
    makendo
    makendo

    Reply 14 days ago

    Great! Hope it is useful for you as it has been for us