| 摘要 |
The preferred embodiment of the invention describes a pointing device comprising a cabinet divided in two housings screwed together. Below the upper housing, a flexible, hard-use film contains all button symbols printed thereon and aligned with the housing upper side holes and tact switch actuators. A high-relief surface defines the visible surface of depressed buttons surrounded by restraining circular walls which arise from said high-relief surface. All buttons are placed in a bas-relief surface to avoid undesired or unintended pressings. Moreover, the fact that they are in a depressed surface help people with limb movement disorders to avoid the involuntary movement of their fingers beyond the limits of the depressed buttons, which act as restraining areas, thus avoiding to click, press or hold an undesired button. |
