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Finger Washer

Jul 21, 2022 - 2 minute read
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Github link: https://github.com/bigcrimping/finger_washer/

finger_washer

A washer, but for your finger

The design consists of five main parts,

  1. A top housing with integrated water spraying section,
  2. A middle housing which acts as a drain to the . .
  3. A lower housing which has the pump
  4. A rear panel to hold the wiring
  5. A set of two gaskets to seal the parts

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Wiring

The wiring is simply

USB 5V –> switch –> LED/pump

Parts

In addition to the 3D prints you would need

  1. Pump = flintronic Submersible Water Pump
  2. Switch = RUNCCI-YUN 12mm Waterproof Momentary Push Button
  3. LED = 8mm 5V blue panel mount LED
  4. A short length of 8mm ID piping

Mechanical Files

image The mechanical files are found in: https://github.com/bigcrimping/finger_washer/tree/main/finger_washer_3MF

The lower requires 4 x M3 brass inserts image

The middle acts as a drain and passes through the pipe image

The upper hosts the switch and LED image

and contains the spray jets image

Plug Mold

The rear of the lower contains a drain hole which needs a plug, The mold files are here: https://github.com/bigcrimping/finger_washer/tree/main/plug_mold_3MF

Print each half and then use an appropriate material for casting, I used the above files scaled to 120% for a tight fit and to cope with shrinkage.

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I used Cataldo Quick-sil

Gasket

To seal the three pieces I cut two gaskets on a laser cutter although you could probably print a template on paper and cut it out

The DXF is found here: https://github.com/bigcrimping/finger_washer/tree/main/gasket_DXF

I used Flexfoil 2mm gasket paper