Patent ID: 8558794

Claim:
A trackball module for connecting a trackball to an electrical device, the trackball module comprising a trackball configured for being manipulated by hand, a sensor device for detecting a turning of the trackball, a casing having a first receiving part for receiving the trackball, the first receiving part comprising an inclined first sliding surface and a second receiving part for receiving the sensor device, the second receiving part comprising an inclined second sliding surface and a support device for positioning the trackball in a use position, in which the trackball is exposed for being manipulated, and a rest position, in which the trackball is adapted for being received by the electrical device, and having an operating direction defined substantially by a line through the center of the trackball and the center of a manipulating surface of the trackball exposed for turning the trackball by hand in the use position, wherein the casing is movable by means of the support device, the first receiving part and the second receiving part are movable with respect to each other, the inclined second sliding surface is configured to be in contact with the first sliding surface during at least a part of the movement of the first receiving part with respect to the second receiving part, and the support device is configured to change the position of the sensor device with respect to the trackball so that the sensor device is arranged mainly along the operating direction for detecting the turning of trackball in the use position and offset in a direction generally perpendicular to the operating direction in the rest position with respect to the position of the trackball.