Tablet PC case and electronic apparatus

1. A tablet PC case, comprising:

a first protective cover having an opening in which a display surface of a tablet PC is exposed, the first protective cover configured to house the tablet PC therein;

a second protective cover configured to cover the opening of the first protective cover and thereby open or close the opening; and

a connection unit connecting the first protective cover and the second protective cover in a relatively movable manner, the connection unit configured to hold the first protective cover in a standing state in which the first protective cover stands on the second protective cover,

wherein

the first protective cover includes a frame body configured to cover an outer circumferential portion of the tablet PC, the frame body also configured to hold the tablet PC,

the frame body includes a pair of retained frame portions configured to extend along one edge of the outer circumferential portion of the tablet PC, the one edge being opposed to the second protective cover in the standing state, the pair of retained frame portions being disposed at an interval in an extending direction in which the one edge extends,

the retained frame portions each include:

an outer surface portion having a curved convex surface, extending in the extending direction, and

a first end face positioned on an inside end portion of the retained frame portion in the extending direction, the first end face being directed inward in the extending direction,

the second protective cover includes:

a chassis having a plate external shape,

the chassis configured to hold an input unit,

an inner surface of the second protective cover configured to support the input unit,

a terminal group exposed on the inner surface of the second protective cover in a position closer to the connection unit than the input unit, the terminal group being electrically connectable to a lateral surface of the tablet PC in the standing state, and

a magnet portion inside the chassis, the magnet portion configured to attract the tablet PC by means of a magnetic force when the terminal group is connected to the tablet PC,

the chassis has a groove portion recessed from a front surface of the chassis and extending in the extending direction,

the groove portion includes:

a first groove extending in the extending direction so that the one edge of the tablet PC in the standing state is able to be retained in the first groove, and

a pair of second grooves disposed on respective both sides of the first groove in the extending direction and extending in the extending direction so that the pair of retained frame portions is retained in the standing state in the pair of second grooves,

each of the second grooves include:

a groove base surface having a curved concave surface, the groove base surface extending in the extending direction, the groove base surface being in contact with the outer surface portion, and

a second end face positioned on an inside end portion of the second groove in the extending direction, the second end face being directed outward in the extending direction, the second end face being opposed to the first end face in the standing state, and

the terminal group is in the first groove.

2. The tablet PC case according to claim 1 , wherein

the second groove has a groove width that is wider than a groove width of the first groove, and

the second groove has a groove depth that is deeper than a groove depth of the first groove.

3. The table PC case according to claim 1 , wherein

the first groove includes a base surface having a curved concave surface, the base surface extending in the extending direction, and

the groove base surface has a curvature radius that is larger than a curvature radius of the base surface in a cross sectional view perpendicular to the extending direction.

4. The tablet PC case according to claim 1 , wherein

the second groove includes a blocking wall positioned on an outside end portion of the second groove in the extending direction, and

the blocking wall blocks the second groove from exposed to outside of the tablet PC in the extending direction.

5. The tablet PC case according to claim 1 , wherein the first groove has a length in the extending direction, the length being longer than a length of the second groove in the extending direction.

6. The tablet PC case according to claim 1 , wherein the groove portion is disposed over an entire length of the front surface of the chassis in the extending direction.

7. The tablet PC case according to claim 1 , wherein

the terminal group includes

a pin portion projecting from the base surface of the first groove into an inside the first groove, wherein an amount of projection of the pin portion is changeable, and

an urging portion configured to urge the pin portion in a direction in which the pin portion projects from the base surface.

8. The tablet PC case according to claim 1 , wherein the terminal group includes a plurality of terminals aligned in the extending direction.

9. The tablet PC case according to claim 1 , wherein

the connection unit includes:

a support plate connected to the first protective cover, the support plate configured to support the first protective cover, and

a deformable flexible sheet connecting the support plate and the second protective cover.

10. The tablet PC case according to claim 1 , wherein

the input unit is a keyboard, and

the terminal group includes a terminal configured to feed power from the tablet PC to the keyboard and a terminal configured to output an input signal from the keyboard to the tablet PC.

11. An electronic apparatus, comprising:

the tablet PC case according to claim 1 , and

the tablet PC is housed in the first protective cover.