Reed sensors in Electric Toothbrushes

Electric toothbrushes are designed to make the brush head and bristles move in rapid motions, either in a back-and-forth motion, or in a back and forth motion that also rotates both clockwise and anti-clockwise.

The basic design of an electric toothbrush is that the whole working assembly is sealed within a water proof body with an O-ring sealed battery compartment which protects the battery from moisture. Most of the controls for operating the electric toothbrush and turning it on or off require sealed switches that will not be affected by water.

This is where ultra-miniature reed switches help. The switches and buttons that are encased in the the rubber body use magnets that trigger the reed switches inside that require multiple presses to change speed and a single short press or a long press of the power button to turn the electric toothbrush on and off. This is achieved by mounting tiny magnets under these buttons that activate or signal cycle the reed switches mounted inside the toothbrush assembly.

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Position sensing Type

Position Sensing type application When an application requires the end position of a movement sensed, or the sensing of a part when it Continue reading -> Nov 7, 2020

Recommended Products

The Reed Switches and Sensors used in such applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

UM-0018-H Ultra Miniature Reed Switch

These highly sensitive, Ultra Miniature Form A reed switches are designed for low power, high speed switching applications and Continue reading -> Nov 8, 2022

MM-1018 Micro Miniature Reed Switch

This 10.0 mm long, Form A type Micro Miniature reed switch is designed for moderate power, low load applications. The fast operate Continue reading -> Nov 8, 2022

MS-104 Ultra Miniature PCB Mountable Reed Sensor

Drawing of MS-104Drawing of MS-104 Pad Layout starFeatures5W Contact Rating. 10.1 mm PCB Pitch. Normally Open contact. Two Continue reading -> Oct 30, 2020

MS-105 Miniature PCB Mountable Reed Sensor

Drawing of MS-105 Reed SensorDrawing of MS-105 PCB Pad Layout starFeatures10W Contact Rating. 12.7 mm PCB Pitch. Normally Open Continue reading -> Oct 30, 2020