electric toothbrush for dummies
Post on 16-Apr-2017
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How it works: electric toothbrush
electric toothbrush for dummiesElisa Bagein
Today
Sonic toothbrushTypes
Rotating toothbrush (oscillating)Types
ToothbrushBraunRotating toothbrush
Whats inside a toothbrush?
Whats inside a toothbrush?Exploded view
The coilIs a part of the transformerTransformer: makes the toothbrush can recharge its batteries without any metal contact between the recharger and the toothbrush.
batteries
Rechargable batteriesStore the energy from the transformerNI-MH-batteries - high energy density- less memory effect than NiCad3V
MotoRDC-motorConverts electric fluxinto mechanical movement
Cam and Gears
Converts rotation (from the motor) into an oscillating movement
Cam and Gears
Cam and Gears
Brush head inside
MaterialsOuter caserubberrubber => for grip, elasticABS=> high thixotropy
MaterialsBrushhead: ABSBristles: nylon and rubberGears: POM=> great fabricability=> precise tolerance on dimensionsHolder parts: POM=> very strong but also resilient/elastic
How it works
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