| 摘要 |
The present invention provides a self-centering input device (100, 100a, 100b). The device (100, 100a, 100b) includes a puck (140,140a) which is moveable in a housing (120). Displacement of the puck (140,140a) is reflected as movement of a cursor on a screen and clicking of a dome switch (170) selects a menu item on the screen. An annular spring (150) acts on a boss (146, 146a) of the puck (140, 140a) and a wall element (126) to resiliently centre it thereat so that a user feels a tactile feedback as the puck (140,140a) is displaced from its centre. In one embodiment, the boss (146, 146a) and wall element (126) are non-circular and they engage with the inside circumference of the annular spring (150) to maintain orientation of the puck (140,140a) with respect to the self-centering input device (100, 100a, 100b). |
