US Patent 9164551 Tablet computer

A tablet computer includes a housing, a cover, and a keyboard. The housing has an opening and an accommodating trough inwardly recessed from the opening. The accommodating trough has a groove having an inlet section and an engaging section. The inlet section is communicated between the opening and the engaging section. Widths of the inlet section are larger than widths of the engaging section. The cover is pivotally connected to the housing. The cover covers the opening when rotated to a covering position, and supports the housing in a standing position when rotated to an extended position. The keyboard is detachably accommodated in the accommodating trough and includes at least one engaging structure. The engaging structure is located at the peripheral edge of the keyboard and engaged with the engaging section.