Computer with a detachable case

A computer with a detachable case comprising:

• a first case member, having at least one first retaining portion;
• and
• a second case member abutted to the first case member and including a rotating member and at least one spring member, the rotating member being pivoted to the second case member and rotatable relative to the second case member between a first position and a second position;
• the spring member being adapted to impart a pulling force to the rotating member to pull the rotating member from the second position to the first position when the rotating member is on the second position;
• wherein the rotating member further comprises a second retaining portion, the second retaining portion being forced into engagement with the first retaining portion when the rotating member is turned to the first position, the second retaining portion being disengaged from the first retaining portion when the rotating member is turned to the second position.