A method for the production of a piece of furniture such as a seat, a bed, a table, the piece of furniture including at least one furniture component (10), the method including the steps of making a blank (11) of expanded polystyrene (EPS) with density between 15 and 25 kg/me, the blank (11) being configured to act as a core for the furniture component (10); providing an interface surface (12) in the blank (11); making a rigid insert (13) in rigid material having an engagement portion (14) configured to engage with the interface surface (12) of the blank (11) and a first connection portion (15) opposite the engagement portion; joining the rigid insert (13) and the interface surface (12) so that the engagement portion (14) is engaged with the interface surface (12) and the first connection portion (15) faces aside opposite to the blank (11); coating the blank (11) and the rigid insert (13) by at least one coating layer (30) of polyurethane material, so that the coating layer (30) completely covers the blank (11) and the insert (13), with the exception of at least one part (16) of the first connection portion (15).

An active sitting chair is provided that encourages a sitter/user to sit actively by requiring balance adjustments and core engagement. The active sitting chair can be efficiently produced while being relatively sturdy and lightweight. The main body may be a monocoque shell that includes a rounded lower portion that contacts the surface the chair is on and promotes wobble of the chair when a sitter is seated on the chair. The chair may also include built-in handles for ease of lifting and a seat portion at the top of the chair that may include a cushion or similar component for increasing the stability and/or comfort of a sitter.

An active sitting chair is provided that encourages a sitter/user to sit actively by requiring balance adjustments and core engagement. The active sitting chair can be efficiently produced while being relatively sturdy and lightweight. The main body may be a monocoque shell that includes a rounded lower portion that contacts the surface the chair is on and promotes wobble of the chair when a sitter is seated on the chair. The chair may also include built-in handles for ease of lifting and a seat portion at the top of the chair that may include a cushion or similar component for increasing the stability and/or comfort of a sitter.

Disclosed is a frame assembly for a folding type chair that are folded or unfolded once by coupling a plurality of upper and lower supports configuring a main frame of a chair to be operatively associated.

Disclosed is a frame assembly for a folding type chair that are folded or unfolded once by coupling a plurality of upper and lower supports configuring a main frame of a chair to be operatively associated.

A seating arrangement includes a base member, and an integrally formed support member coupled to the base member and supporting a seat moveable from an upright position to a reclined position, wherein a portion of the support member is bendable as the seat moves from the upright position to the reclined position such that a first side of the support member is put in tension and a second side generally opposite the first side is put in compression, and wherein the first side includes a tensile substrate so that the first side has as higher modulus of elasticity than the second side.

A seating arrangement includes a base member, and an integrally formed support member coupled to the base member and supporting a seat moveable from an upright position to a reclined position, wherein a portion of the support member is bendable as the seat moves from the upright position to the reclined position such that a first side of the support member is put in tension and a second side generally opposite the first side is put in compression, and wherein the first side includes a tensile substrate so that the first side has as higher modulus of elasticity than the second side.

A chair includes a base, a receptacle coupled to an upper end of the base, and a seat shell forming a seat surface. The seat shell is supported by the receptacle. The chair also includes a back shell forming a back surface. The back shell is connected to the seat shell on both sides of the seat surface and on both sides of the back surface. The back shell includes an extension extending from the back surface to the receptacle under the seat shell. The extension is elastically deformable.

A chair includes a base, a receptacle coupled to an upper end of the base, and a seat shell forming a seat surface. The seat shell is supported by the receptacle. The chair also includes a back shell forming a back surface. The back shell is connected to the seat shell on both sides of the seat surface and on both sides of the back surface. The back shell includes an extension extending from the back surface to the receptacle under the seat shell. The extension is elastically deformable.

A backrest for use in a chair includes a back board arranged in a position to abut a back of a seated person on the chair. A first area that is a laterally central area of the back board has a thickness greater than a thickness of a second area of the back board located closer to each of left and right ends of the back board than the first area.