A seating module for use with a chair frame includes a perimeter frame member. A resilient internal platform is attached to the perimeter frame member at a static portion. An upper seat cushion is disposed on top of a resilient internal platform. The resilient internal platform is biased to an original shape that defines a resting position. Upon a patient resting upon the resilient internal platform, the resilient internal platform deflects in a downward direction toward a seating position and contemporaneously exerts an upward biasing force that assists the patient in reaching a seated position and also assists the patient is moving upward from the seated position.

A seating module for use with a chair frame includes a perimeter frame member. A resilient internal platform is attached to the perimeter frame member at a static portion. An upper seat cushion is disposed on top of a resilient internal platform. The resilient internal platform is biased to an original shape that defines a resting position. Upon a patient resting upon the resilient internal platform, the resilient internal platform deflects in a downward direction toward a seating position and contemporaneously exerts an upward biasing force that assists the patient in reaching a seated position and also assists the patient is moving upward from the seated position.

A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.

A lower chair for supporting an upper chair on which a user sits. The lower chair including a base, a swivel mechanism supported by the base and defining a vertical swivel axis, and a four-bar linkage mounted to the swivel mechanism for rotation about the swivel axis. The four-bar linkage includes a coupler link that moves about a coupler curve. The lower chair also includes a column having a lower end affixed to the coupler link for movement of the lower end along the coupler curve. The column defines a column axis and is adapted to support the upper chair.

An extendable seating interconnected mechanism and a seating supporting frame, including an interconnected assembly, a seating frame, and a backrest mount, wherein the backrest mount is rotatably connected to the interconnected assembly and the seating frame, respectively; the interconnected assembly includes a mounting plate and a driving link, wherein the mounting plate includes a lateral-plate part and a supporting part; the driving link is rotatably connected between the seating frame and the lateral-plate part; an end of the supporting part is connected to the lateral-plate part; and an opposite end of the supporting part is rotatably connected to the backrest mount. The interconnected mechanism and the seating supporting frame optimize and simplify the structure, leading to a compression of the height of the seating supporting frame; different seating positions may be adjusted smoother by connecting the extendable and retractable footrest mechanism and interconnected assembly, which improves the seating comfort.

An extendable cushion assembly includes a cushion that is movable between an extended state and a retracted state, and a base upon which the cushion is removably coupled. The base is movable between an extended state and a retracted state. When the cushion is coupled to the base and when the base adopts the extended state or the retracted state the cushion is configured to adopt the extended or the retracted state respectively.

An extendable cushion assembly includes a cushion that is movable between an extended state and a retracted state, and a base upon which the cushion is removably coupled. The base is movable between an extended state and a retracted state. When the cushion is coupled to the base and when the base adopts the extended state or the retracted state the cushion is configured to adopt the extended or the retracted state respectively.

The present application provides an intelligent sofa mechanical extension device, including a base, a driving component and an extension component, where the driving component and the extension component are disposed on the base. The driving component includes a motor and a motor guide rail that are disposed on the base. The motor guide rail is provided with a motor moving slider in a slidable manner. An end of the motor is connected to the moving slider. The moving slider is connected to a driving rod through a drive connector. The driving rod is disposed on the seat cushion support assemblies on the left and the right side. The extension component is driven to stretch or retract with back-and-forth movement of the motor moving slider along the motor guide rail.

Embodiments of chair systems incorporating trekking poles include a low-back design employing fixed-length trekking poles, and a high-back design employing adjustable-length trekking poles that allow for adjusting the recline angle of the chair. The chair system generally includes a tubular frame that releasably engages a flexible seat. The tubular frame includes a front hub and a rear hub spaced one from the other by a cross bar, plus front and rear footings which stabilize the chair system on the ground or undersurface. A V-shaped upper support extending from the front hub supports and holds open the leg portion of the flexible seat, while the trekking poles are releasably engaged with and extend upwardly from the rear hub to support, and hold open and upright the back portion of the flexible seat.

In a configuration in which a holder holding a controller is mounted on a seat part with a plate-shaped member, the exposure of the mounting part of the plate-shaped member on which the holder is mounted is eliminated. A seat device includes a pressure sensor measuring a value relating to the seated person's state, a vibration imparting device performing a vibration imparting operation, an ECU controlling the vibration imparting device corresponding to the measurement result of the pressure sensor, a holder holding the ECU, and a mounting bracket fixed to a lower frame such that the holder is mounted on the lower frame of a seat part. The mounting bracket includes a mounting projection on which side wall of the holder is mounted in a predetermined mounting direction. When the side wall is mounted on the mounting projection, the mounting projection is covered with the side wall.