| 摘要 |
<p num="1"><br/><br/><br/>A user operable device for control of or communication with an electric <br/>appliance, in particular a user operable pointing device such as a mouse, <br/>comprising electrical components and circuits including sensor means, <br/>processing means and wireless communication means for detecting movements <br/>including at least rotational movements of the device, producing data related <br/>to said movements and transmitting said data to the electric appliance, is <br/>characterised in that the device (1) is essentially a ball (2) including outer <br/>surface (2'') for free rolling and for receiving influences of physical effects <br/>on the surface and the device, and that said electrical components and <br/>circuits (3, 4, 5, 6, 7, 8, 9, 10) are inside the ball (2) in integrated <br/>relationship with the ball. The invention concerns also a user interface <br/>comprising the user operable device of the invention.<br/>
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