Patent ID: 7016263

Claim:
A device for data entry into a portable object, in particular into a watch, said device including a control button arranged on an external non-magnetic wall of the object, said button comprising an elastic mass enclosing a permanent magnet, and a magnetic sensor arranged inside the object on the other side of the wall and facing the control button, said sensor being able to provide electric signals representing movements of the magnet to electronic data processing means, wherein a lower surface of the analogue control button, which is mechanically uncoupled from the sensor, is held fixed so that the magnet in the elastic mass can be bent during movements of said control button, and wherein the analogue magnetic sensor is arranged to measure a magnetic field variation caused by the movement of the button in at least one direction component parallel to said wall, said wall acting as sealed protection for the sensor and the electronic means housed within the object for managing the electric signals of the device.