The document discusses different types of electric toothbrushes, including sonic and rotating/oscillating models. It provides an exploded view of what is inside a toothbrush, including the coil that allows wireless charging, rechargeable batteries to store energy, a DC motor to convert electricity to movement, and cam and gears to convert the motor's rotation into oscillation. The document also lists common materials used in different toothbrush components, such as rubber, ABS, nylon, and POM plastic.

1. electrictoothbrushfordummies Elisa Bagein

2. Today

3. Types Sonictoothbrush

4. Types Rotatingtoothbrush (oscillating)

5. Toothbrush Braun Rotatingtoothbrush

7. What’sinside a toothbrush?

8. What’sinside a toothbrush? Exploded view

9. The coil Is a part of the transformer Transformer: makes the toothbrush can recharge its batteries without any metal contact between the recharger and the toothbrush.

10. batteries Rechargablebatteries Store the energyfrom the transformer NI-MH-batteries - high energydensity - less ‘memory’ effect thanNiCad 3V

11. MotoR DC-motor Converts electric flux into mechanical movement

12. Cam and Gears Convertsrotation (from the motor) intoanoscillatingmovement

13. Cam and Gears

14. Cam and Gears

15. Brushheadinside

16. Materials Outer case rubber rubber => for grip, elastic ABS => high thixotropy

17. Materials Brushhead: ABS Bristles: nylon and rubber Gears: POM => greatfabricability => precisetoleranceondimensions Holderparts: POM => verystrongbutalsoresilient/elastic

18. Howitworks