An ergonomic chair, includes: a support structure, a seat assembly, and a backrest. The seat assembly includes a seat and a seat mount arranged on the support structure. The backrest is rotatably connected to the support structure through a backrest support, and the backrest is configured to be rotatable and fixed relative to the seat assembly.

An ergonomic chair, includes: a support structure, a seat assembly, and a backrest. The seat assembly includes a seat and a seat mount arranged on the support structure. The backrest is rotatably connected to the support structure through a backrest support, and the backrest is configured to be rotatable and fixed relative to the seat assembly.

A chair for providing support to a user's spine to improve posture and for providing ways for the user to perform exercises. The chair may include a flexible connection that enables a back support to move side to side through a sidebending range of motion of the user. The back support, which may include a flexible chair spine, may be configured to adapt to the curvature of the user's spine when the user is seated in the chair. A seat of the chair may include channels and vents to improve air circulation within the seat.

A chair for providing support to a user's spine to improve posture and for providing ways for the user to perform exercises. The chair may include a flexible connection that enables a back support to move side to side through a sidebending range of motion of the user. The back support, which may include a flexible chair spine, may be configured to adapt to the curvature of the user's spine when the user is seated in the chair. A seat of the chair may include channels and vents to improve air circulation within the seat.

The present application relates to sofa with a turnable backrest, including a sofa seat frame, a backrest body, and an extension mechanism, wherein the backrest body is connected to the sofa seat frame through the extension mechanism; the extension mechanism is configured to turn and flatten the backrest body from a backrest position of the sofa seat frame to a position above a sitting position, and configured to turn the backrest body back to the backrest position.

The present application relates to sofa with a turnable backrest, including a sofa seat frame, a backrest body, and an extension mechanism, wherein the backrest body is connected to the sofa seat frame through the extension mechanism; the extension mechanism is configured to turn and flatten the backrest body from a backrest position of the sofa seat frame to a position above a sitting position, and configured to turn the backrest body back to the backrest position.

A chair for providing support to a user's spine to improve posture and for providing ways for the user to perform exercises. The chair may include a flexible connection that enables a back support to move side to side through a sidebending range of motion of the user. The back support, which may include a flexible chair spine, may be configured to adapt to the curvature of the user's spine when the user is seated in the chair. A seat of the chair may include channels and vents to improve air circulation within the seat.

A chair for providing support to a user's spine to improve posture and for providing ways for the user to perform exercises. The chair may include a flexible connection that enables a back support to move side to side through a sidebending range of motion of the user. The back support, which may include a flexible chair spine, may be configured to adapt to the curvature of the user's spine when the user is seated in the chair. A seat of the chair may include channels and vents to improve air circulation within the seat.

An adjustable seat assembly may have a seat back that is configurable in a fore position or a stern-facing seat, an aft position for a bow-facing seat, and a pillow position which facilitates a user laying down across the stern-facing seat. In addition, the seat back may be placed in a stowed position in which the seat back is absent from both the bow-facing and stern-facing seats, such that the seats cooperate to provide a planar support surface along an aft-to-fore extent of the seat assembly. The seat back may be adjustable by hand without tools, such that a user may easily reconfigure the seat assembly to sit facing the bow, to sit facing the stern, or to lie down.

An adjustable seat assembly may have a seat back that is configurable in a fore position or a stern-facing seat, an aft position for a bow-facing seat, and a pillow position which facilitates a user laying down across the stern-facing seat. In addition, the seat back may be placed in a stowed position in which the seat back is absent from both the bow-facing and stern-facing seats, such that the seats cooperate to provide a planar support surface along an aft-to-fore extent of the seat assembly. The seat back may be adjustable by hand without tools, such that a user may easily reconfigure the seat assembly to sit facing the bow, to sit facing the stern, or to lie down.