| 摘要 |
An ergonomic pointing device receives user commands for controlling an electronic device. Typically three switches are provided underneath a navigation wheel. The two side switches are typically located towards the back right and left corners of the navigation wheel body, whereas the select/enter dome switch is typically located in an area that is at or substantially near the front midsection of the wheel body. A pivot pin is typically provided in a back center area of the navigation wheel body. The navigation wheel is arranged to slightly rock in response to a user's downwards force. The left and right switches operate when the wheel rocks left and right about the pivot pin. The select/enter switch operates when the wheel rocks frontward and backwards about the pivot pin. An optional plastic cap can be used to secure the navigation wheel assembly to a base such as a printed circuit board.
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