Magnetically coupled waterproof hinge with integrated multi-stage button and state detection

An example of a waterproof hinge and button configuration for a head mounted device is provided. A magnet may be attached to the button, and a sensor may be positioned adjacent to the button to detect movement of the button. For example, the sensor may detect when the button is fully pressed, partially pressed, or not pressed at all by the level of magnetic flux density detected by the sensor. In addition, the sensor may detect an opened or closed position of the hinge based on the magnetic field polarity of the magnet. Due to the implementation of the sensor, the electrical components of the button are able to be removed so as to make the button-hinge configuration waterproof.