Foldable sofa-bed

1. A foldable sofa-bed, comprising:

a base having a cavity;

a bed with a seat section and a subseat section, each of the seat section and the subseat section including a cushion and an underlying panel; and

a bed folding mechanism attached to the base, subseat and seat, the bed folding mechanism configured to move the bed between a folded position, in which the seat and subseat sections are generally horizontally disposed and positioned in vertically stacked relationship in the cavity of the base, with the seat and subseat cushions facing upwardly, and an unfolded position, in which the seat and subseat sections are horizontally disposed and aligned to form a sleeping surface;

wherein in moving from the unfolded position to the folded position, the subseat section moves forwardly relative to the base; and

wherein the bed folding mechanism includes:

front and rear subseat swing links directly pivotally attached to the base and to the subseat section;

front and rear seat links pivotally attached to the base and to the seat section; and

a tying link directly pivotally attached to one of the front and rear subseat swing links and one of the front and rear seat swing links.

2. The foldable bed defined in claim 1 , wherein a portion of the seat is positioned forwardly of the base in the unfolded position.

3. The foldable bed defined in claim 1 , wherein a rear edge of the seat section engages a front edge of the subseat section in the unfolded position.

4. The foldable bed defined in claim 1 , wherein the rear edge of the seat section is angled to face downwardly, and the front edge of the subseat section is angled to face upwardly.

5. The foldable bed defined in claim 1 , wherein the sleeping surface formed by the seat and subseat cushions is between about 53 and 60 inches in the longitudinal dimension.

6. The foldable bed defined in claim 1 , further comprising a leg pivotally attached to the seat section and a leg folding mechanism attached to the leg and to the seat section, the leg folding mechanism configured to move the leg between an extended position and a retracted position under the seat section.

7. The foldable bed defined in claim 6 , wherein the leg folding mechanism is coupled to the folding mechanism, such that the leg takes the extended position when the bed is in the unfolded position and the leg takes the retracted position when the bed is in the folded position.

8. The foldable bed defined in claim 1 , wherein the folding mechanism includes a biasing unit that biases the bed toward the unfolded position as the bed moves toward the folded position and biases the bed toward the folded position as the bed moves toward the unfolded position.

9. A foldable sofa-bed, comprising:

a base having a cavity;

a bed with a seat section and a subseat section, each of the seat section and the subseat section including a cushion and an underlying panel; and

a bed folding mechanism attached to the base, subseat and seat, the bed folding mechanism configured to move the bed between a folded position, in which the seat and subseat sections are generally horizontally disposed and positioned in vertically stacked relationship in the cavity of the base, with the seat and subseat cushions facing upwardly, and an unfolded position, in which the seat and subseat sections are horizontally disposed and aligned to form a sleeping surface;

wherein in moving from the unfolded position to the folded position, the subseat section moves forwardly relative to the base; and

further comprising a leg and a leg folding mechanism attached to the leg and to the seat section, the leg folding mechanism configured to move the leg between a fully extended position and a retracted position under the seat section;

wherein the leg folding mechanism includes a brace directly pivotally attached to the leg and to the seat section and a leg extension link that is directly pivotally attached to the leg and to the seat section, the leg extension link being oriented generally vertically in the fully extended position;

wherein the leg folding mechanism is coupled to the folding mechanism, such that the folding mechanism drives the leg to the extended position when the bed is in the unfolded position and to the retracted position when the bed is in the folded position.