Portable information device

1. A portable information device comprising:

a first and second chassis members;

a hinge mechanism rotatably connects said first and second chassis members to allow said first and second chassis members to change between a flat form in which said first and second chassis members are arranged side-by-side and a stacked form in which said first and second chassis members are overlapped each other;

a first support plate located at an inner surface of said first chassis member;

a second support plate located at an inner surface of said second chassis member to be adjacent to said first support plate;

a display supported by front surfaces of said first and second support plates;

an alignment part aligns said front surfaces between one edge of said first support plate and one edge of said second support plate adjacent to each other, when said chassis members are in said flat form;

a first support part supports said first support plate relative to said first chassis member; and

a second support part supports said second support plate relative to said second chassis member, wherein at least one of said first and second support parts includes a floating part that supports a corresponding support plate relative to a corresponding chassis member in a floating state.

2. The portable information device of claim 1 , wherein each of said first and second support parts includes said floating part.

3. The portable information device of claim 1 , wherein said first support plate is attached to said first chassis member via a plurality of first attachment parts, and at least one of said first attachment parts closest to said one edge of said first support plate is composed of said first support part.

4. The portable information device of claim 3 , wherein said second support plate is attached to said second chassis member via a plurality of second attachment parts, and at least one of said second attachment parts closest to said one edge of said second support plate is composed of said second support part.

5. The portable information device of claim 3 , wherein at least part of said plurality of first attachment parts rigidly fixes said first support plate and said first chassis member to each other.

6. The portable information device of claim 5 , wherein at least part of said plurality of second attachment parts rigidly fixes said second support plate and said second chassis member to each other.

7. The portable information device of claim 1 , wherein

said first support part is provided at each of both longitudinal ends of said one edge of said first support plate,

said second support part is provided at each of both longitudinal ends of said one edge of said second support plate, and

said alignment part is provided at a position between both longitudinal ends of said one edge of said first support plate and said one edge of said second support plate.

8. The portable information device of claim 5 , wherein said first support plate and said second support plate each include a float part in a state of floating from a corresponding one of said inner surfaces of said first chassis member and said second chassis member, at a position between both longitudinal ends of said one edge, said float part being provided with said alignment part.

9. The portable information device of claim 1 , wherein said hinge mechanism includes

a first hinge chassis fixed to said inner surface of said first chassis member;

a second hinge chassis fixed to said inner surface of said second chassis member; and

a hinge shaft rotatably connects said first hinge chassis and said second hinge chassis.

10. The portable information device of claim 9 , wherein

said first support part supports said first support plate relative to said first hinge chassis, and

said second support part supports said second support plate relative to said second hinge chassis.

11. The portable information device of claim 1 , wherein said floating part includes

a hole part formed in at least said first support plate;

a shaft member inserted through said hole part so as to be relatively movable in a shaft direction;

a first stopper provided at one end of said shaft member and prevents the first support plate from coming off said one end;

a second stopper provided at an other end of said shaft member and prevents said first support plate from coming off said other end; and

a spacing between said first stopper and said second stopper is greater than a length of said hole part in said shaft direction.

12. The portable information device of claim 1 , wherein said display extends from said first support plate to said second support plate, and has a foldable single sheet shape.