A rocker chair having a frame and a longitudinal spring member extending from the frame, at or near a surface on which the chair is supported for rocking motion. The spring member includes an anchored portion anchored to the frame, and an extended portion extending from the anchored portion and is free to flex or bend against spring bias of the extended portion, wherein the extended portion is bendable upward from the support surface against spring bias of the extended portion. The frame of the rocker chair may be collapsible to convert from a collapsed configuration for stowing, to an extended configuration for seating a person. The spring member may include an anchored portion anchored to at least a portion of a bottom of the frame, and an extended portion extending from the anchored portion, wherein the extended portion is bendable against spring bias of the extended portion.

A furniture member may include a base frame and a seat assembly mounted on the base frame. The seat assembly may include a seat frame, a seatback, a seat bottom, and a legrest mechanism. The legrest mechanism may be mounted to the seat frame and attached to a legrest platform. The legrest mechanism may include a drive rod coupled to a pantograph linkage that is movable relative to the seat frame between retracted and extended positions.

A furniture member may include a base frame and a seat assembly mounted on the base frame. The seat assembly may include a seat frame, a seatback, a seat bottom, and a legrest mechanism. The legrest mechanism may be mounted to the seat frame and attached to a legrest platform. The legrest mechanism may include a drive rod coupled to a pantograph linkage that is movable relative to the seat frame between retracted and extended positions.

A seat with a base, an actuator, at least one front boom, at least one rear boom, a seat platform, and a back platform. The actuator is circularly rotatably connected to each of the at least one front boom, the at least one rear boom, the seat platform, and the back platform. The base is circularly rotatably connected to each of the at least one front boom and the at least one rear boom.

A seat with a base, an actuator, at least one front boom, at least one rear boom, a seat platform, and a back platform. The actuator is circularly rotatably connected to each of the at least one front boom, the at least one rear boom, the seat platform, and the back platform. The base is circularly rotatably connected to each of the at least one front boom and the at least one rear boom.

A device for moving the back and core muscles while sitting includes a rocking assembly that sits atop a base assembly, and optionally a height adjustment mechanism between the rocking assembly and the base assembly. The rocking assembly includes a rocking mechanism that sits between a base plate or platform and a seat. The rocking mechanism can be, for example, a hollow or solid hemispheric- or dome-shaped rocking mechanism, an eccentric bicylinder rocking mechanism, and/or a rocking mechanism based on an arrangement of halfpipe members. The rocking mechanisms of the exercise chair allow to the seat to rock, wobble, and/or swivel with a side-to-side rocking motion, a front-to-back rocking motion, or both a side-to-side rocking motion and a front-to-back rocking motion, and are attached to base plate and seat via a fastener that includes a solid strut that passes through the rocking mechanism and includes a plurality of Belleville washers.

A device for moving the back and core muscles while sitting includes a rocking assembly that sits atop a base assembly, and optionally a height adjustment mechanism between the rocking assembly and the base assembly. The rocking assembly includes a rocking mechanism that sits between a base plate or platform and a seat. The rocking mechanism can be, for example, a hollow or solid hemispheric- or dome-shaped rocking mechanism, an eccentric bicylinder rocking mechanism, and/or a rocking mechanism based on an arrangement of halfpipe members. The rocking mechanisms of the exercise chair allow to the seat to rock, wobble, and/or swivel with a side-to-side rocking motion, a front-to-back rocking motion, or both a side-to-side rocking motion and a front-to-back rocking motion, and are attached to base plate and seat via a fastener that includes a solid strut that passes through the rocking mechanism and includes a plurality of Belleville washers.

A base seat, which is adapted for being used with a bed, a chair or a sofa, includes a fixation base, a first rocking mount disposed above the fixation base and driven by a first drive device to reciprocatingly swing back and forth relative to the fixation base, a second rocking mount disposed above the first rocking mount and driven by a second drive device to reciprocatingly swing from side to side relative to the first rocking mount, and a swivel mount disposed above the second rocking mount and driven by a third drive device to rotate about an imaginary vertical axis. As such, the base seat can swing back and forth, swing from side to side, and rotate, independently or simultaneously.

An activating platform is disclosed. The platform includes a base that has a lower surface that is curved in a direction transverse to a longitudinal axis. The curved shape of the base provokes a user rock around in a small angle around a middle position, thereby promoting active sitting.

An activating platform is disclosed. The platform includes a base that has a lower surface that is curved in a direction transverse to a longitudinal axis. The curved shape of the base provokes a user rock around in a small angle around a middle position, thereby promoting active sitting.