A seat structure comprises a base configured to be a chair base assembly; a seat support located above the base, wherein a front part of the seat support has rotary connection with the front part of the base through a transition link; a chair back assembly having rotary connection with a rear part of the base through a pivot; a lever driving member linked between the chair back assembly and the seat support, and having rotary connection with a rear part of the seat support, wherein the lever driving member and the seat support are approximately on the same surface. When the chair back assembly rotates rearward around the pivot from the initial position, the rear part of the seat support is raised diagonally to the rear through the lever driving member, meanwhile the transition link and the front part of the seat support are pulled up.

In view of various movement of a seated person, when giving the left-right swinging operation to the seat in the non-conventional aspect, a chair configured such that the back can perform a new movement suitable for the left-right movement of the seat and return to the predetermined position when the seated person leaves a seat, is realized.

For the purpose, a back 6 is arranged behind a seat 5, and the back 6 has an operation mechanism 6M turning-movably supporting the load received from a seated person in a left-right direction in a front view, and when the load is applied, at least a part of guide part 65a, 66a of the operation mechanism 6M is separated and the back moves freely, and when the applied load is removed, the back automatically returns to the neutral position along the guide part 65a, 66a.

The present disclosure discloses a multifunctional balance chair comprising a support portion, a seat portion, and a kneeling cushion portion. The seat portion is movably connected to the support portion, and an angle between the seat portion and the horizontal plane is controlled by relative movement between the seat portion and the support portion. The kneeling cushion portion is movably connected to the seat portion and connected to the support portion by a connecting mechanism. The kneeling cushion portion is movable between a first position aligned with the seat portion and a second position in which the kneeling cushion portion constitutes a balance chair cushion. The movement of the seat portion is linked to movement of the kneeling cushion portion.

Structures of seating systems for human users are disclosed. In one embodiment, the structure comprises: a frame; a seat structure supported by the frame; and a back rest structure supported by the frame. The seat structure comprises a thigh support region and a pelvic support region where the pelvic support region defines a pelvic well for receiving an ischial tuberosity of the user and also provides a fulcrum to assist in rotating the pelvis of the user. The back rest structure comprises a gluteal panel for supporting a gluteal mass of the user and a posterior superior iliac spine (PSIS) panel disposed above the gluteal panel. The PSIS panel is adjustable to cause movement of a PSIS of the user and cooperate with the pelvic well to cause rotation of the pelvis of the user about the fulcrum provided by the pelvic well.

The posture-enforcing seat is a chair. The posture-enforcing seat is a therapeutic structure. The posture-enforcing seat is adapted for use with a patient. The posture-enforcing seat forms a physical boundary that limits the lateral motion of the thighs of the patient. The posture-enforcing seat comprises a chair structure and a plurality of corrective structures. The plurality of corrective structures attach to the chair structure. The plurality of corrective structures forms the boundary structure that limits the lateral motion of the thighs of the patient.

A locker includes a pair of spaced-apart upstanding sidewalls and at least one shelf extending between the sidewalls, the shelf and sidewalls defining a compartment. A tray is carried on the shelf in the compartment and supported by a pair of rollers and coupled to a pair of rails mounted on the sidewalls above the shelf, wherein the tray slides forward and backward relative to the shelf and rotates about the rollers.

A lightweight, collapsible, and portable wheeled seat, e.g., a wheeled office chair or stool, for travel, storage, and mobility, is disclosed.

An item of seating furniture, in particular an office chair, having a pedestal with a support column on which a first rotational axis for a backrest is arranged which is pivotable between an upright starting position and a reclined resting position. The backrest is articulately connected in its lower region to a seat part, and when the seat part is in one piece, the articulatable connection is provided about a second axis.

When the seating furniture is in the upright starting position, the second axis is arranged below the first axis. The rear seat part is non-rotatably connected to the backrest. The front seat part or the one-piece seat part is supported by kinematicsin relation to the carrying frame. The front seat part or the one-piece seat part is lowered relative to the rear seat part or the backrest by means of kinematics when the backrest is pivoted back.

The dynamic postural device comprises two oscillating elements having respectively: a seating portion to support a buttock of a user; a supporting portion opposite to the seating portion and of a substantially convex shape; in which the supporting portion is adapted to allow the oscillation of the respective oscillating element as a result of the seating of the user.

A chair includes a seat (2) and also includes a pair of thigh support elements (17) pivotal n a generally downwardly direction about front pivot axes (20) from a first state forming with a central seat element (15) a substantially common plane, to a second downwardly extending state. The elements (17) are also pivotal about second pivot axes in a generally rearwardly direction for urging the user's thighs away from each other for stretching the adductor muscles. Foot support members (49) extend transversely and sidewardly on respective opposite sides of the chair (1) from a support element (46) for supporting the foot during a stretching exercise with the corresponding thigh of the subject extending downwardly from the seat (14) and the lower leg extending from the knee in a upwardly inclined direction to the foot support member (49) for stretching the quadriceps and the hip flexor muscles of the subject.