A cushion body for sitting is provided which can offer good feeling of sitting even to many unspecified users of various body shapes and allow them to be seated more comfortably. A cushion body for sitting (1) includes: a base part (2) having a sitting surface (S1) formed of a curved surface that is curved concavely to support, from below, the buttocks of a seated person in a seated posture; and a pair of side supporting portions (3) each having a side supporting surface (S2) formed of a curved surface that is curved continuously from the sitting surface (S1) of the base part (2), where the pair of side supporting portions (3) project from sides of the base part (2) such that the side supporting portions (3) can be bent and deformed by a load applied to the side supporting surfaces (S2), so as to support both the left and right parts of the buttocks of the seated person in the seated posture.

A method for manufacturing a seat cushion receives data of a specific occupant. A seat cushion is designed from the occupant data. The seat cushion is provided with a cellular structure from the occupant data. Another method for manufacturing a seat cushion receives boundary conditions for a seat cushion. Applicable mechanical properties are determined for the boundary conditions of the seat cushion. Applicable thermal properties are determined for the boundary conditions of the seat cushion. A seat cushion is designed with a varying cellular structure to satisfy the applicable mechanical properties and the applicable thermal properties.

A collapsible seat having a base and configured to alternatively take a use position and a storage position wherein the seat is collapsed. The seat includes first and second modules. The first module rotates in a vertical plane having longitudinal elements forming a deformable quadrilateral. The first module is articulated about an axis of rotation mounted on a fixed support and, in the use position, at least two longitudinal elements are in surface contact blocking rotation of the first module along a direction of rotation. The second module, mobile in rotation in the same vertical plane as the first module, has a support leg for surface contact with the ground in the use position and a connecting rod fixed between the first module and the support leg. In the use position, the connecting rod and the support leg are in surface contact blocking rotation of the second module.

A cushion for improving sitting posture, comprising a cushion body (1). The cushion body (1) can be placed on a plane. At least two hump portions (11 and 13) are formed on the cushion body (1). The two hump portions (11 and 13) are a first hump portion (11) and a second hump portion (13), respectively. The first hump portion (11) and the second hump portion (13) are used for supporting the parts of a human body corresponding to the front and back of the pelvis (3), respectively. The first hump portion (11) and the second hump portion (13) are arranged at an interval, so that a trench (12) is formed on the cushion body (1) between the first hump portion (11) and the second hump portion (13). The trench (12) is used for supporting the part of the human body corresponding to the lower end of the ischium or the lower end of the sacrococcyx. The cushion can relax the hip joint and surrounding muscles of the human body so as to facilitate blood supply, can ensure that the human spine always tends to maintain a correct curve so as to protect the lumbar vertebrae (2) of the human body, and can also further relax the cervical vertebrae and surrounding neck muscle tissues so as to prevent backache and headache.

A body support structure includes a structural lattice structure having a first stiffness, and a compressive lattice structure supported by the structural lattice structure and having a second stiffness less than the first stiffness. A skin lattice structure is supported by the compressive lattice structure, wherein the skin lattice structure is resistant to shear deformation in response to a normal force and is expandable in a direction transverse to the normal force.

An improved chair seat design is disclosed comprising a foam cushioning unit having top, middle, and bottom layers of foam secured together into a single unit. The bottom layer of foam includes a recess or slot sized to accommodate a void cell cushioning layer. The void cell cushioning layer is inserted into the recess/slot of the foam cushioning unit. Preferably, the void cell cushioning layer comprises an upper layer having an array of smaller cells with peaks pointing downwardly and pockets facing upwardly into the foam cushioning unit, and a lower layer having larger cells with peaks pointing upwardly and pockets facing downwardly relative to the foam cushioning unit. The foam cushioning unit with void cell cushioning layer inserted is then preferably attached to a contoured seat pan to form an improved office chair seat.

A seating device includes a seat body having a top seat supporting surface, a mounting base coupled at a bottom surface of the seat body, and two wing supports sidewardly extended from two sides of the seat body respectively, wherein each of the wing supports has a top buttock supporting surface upwardly and sidewardly extended from the top seat supporting surface of the seat body to a side tip of the wing support, and a bottom retention surface inclinedly and upwardly extended to the side tip of the wing support for reinforcing the wing support in a tilt up manner so as to prevent the wing support being sagged down when the wing support is pressured.

A seating device includes a seat body having a top seat supporting surface, a mounting base coupled at a bottom surface of the seat body, and two wing supports sidewardly extended from two sides of the seat body respectively, wherein each of the wing supports has a top buttock supporting surface upwardly and sidewardly extended from the top seat supporting surface of the seat body to a side tip of the wing support, and a bottom retention surface inclinedly and upwardly extended to the side tip of the wing support for reinforcing the wing support in a tilt up manner so as to prevent the wing support being sagged down when the wing support is pressured.

A manufacturing method of a seating device includes manufacturing an outer skin; manufacturing a core member via a foaming process; wrapping the core member in the outer skin, coupling a mounting plate at a bottom surface of the core member; and selectively coupling a mounting structure to the mounting plate to form the seating device. The outer skin is constructed to have a top skin layer adhered on a top surface of the core member, a side skin layer adhered on a side surface of the core member, and a bottom skin layer adhered on a bottom surface of the core member. Particularly, the top skin layer of the outer skin is adhered on the top surface of the core member edge-to-edge to initially align and retain the outer skin on the core member.

A manufacturing method of a seating device includes manufacturing an outer skin; manufacturing a core member via a foaming process; wrapping the core member in the outer skin, coupling a mounting plate at a bottom surface of the core member; and selectively coupling a mounting structure to the mounting plate to form the seating device. The outer skin is constructed to have a top skin layer adhered on a top surface of the core member, a side skin layer adhered on a side surface of the core member, and a bottom skin layer adhered on a bottom surface of the core member. Particularly, the top skin layer of the outer skin is adhered on the top surface of the core member edge-to-edge to initially align and retain the outer skin on the core member.