A dynamic furniture system includes a first frame portion; a set of rollers mounted to the first frame portion; a second frame portion including one or more rockers having a roller-interface surface having a curved profile; wherein the set of rollers interface with the roller-interface surface of the rockers such that the second frame portion is moveable relative to the first frame portion; a set of one or more electromagnets mounted to or integrated with the first frame portion or the second frame portion; a set of one or more magnetically-interactive elements mounted to or integrated with a different one of the first frame portion or the second frame portion; and an electronic control system configured to vary a parameter of electrical energy supplied to the set of electromagnets over time to induce back and forth motion of one of the first frame portion or the second frame portion.

Disclosed are a chair device and a star-shaped base (3) thereof, in particular capable of being used for office chairs, work chairs, stools or standing auxiliary devices, the star-shaped base comprising a center seat (4) and a plurality of extending arms (5) mounted on the center seat (4), wherein the extending arms (5) are used for the star-shaped base (3) to be placed on the ground, and at least one of the extending arms (5) is hinged to the center seat (4) and can rotate relative to the center seat (4). A chair seat of the chair device can rotate or swing, while parts mounted at an upper end of a chair column do not need to be modified, and particularly, a supporting structure, a chair support for the chair seat to be placed, and the chair seat itself do not need to be modified.

Disclosed are a chair device and a star-shaped base (3) thereof, in particular capable of being used for office chairs, work chairs, stools or standing auxiliary devices, the star-shaped base comprising a center seat (4) and a plurality of extending arms (5) mounted on the center seat (4), wherein the extending arms (5) are used for the star-shaped base (3) to be placed on the ground, and at least one of the extending arms (5) is hinged to the center seat (4) and can rotate relative to the center seat (4). A chair seat of the chair device can rotate or swing, while parts mounted at an upper end of a chair column do not need to be modified, and particularly, a supporting structure, a chair support for the chair seat to be placed, and the chair seat itself do not need to be modified.

A swing seat unit may include a seat which is provided on a fixing frame and swings on the fixing frame; a dome frame which is provided to be spaced from a rear of the seat and extends upward to surround the rear of the seat; a hemispherical swing dome which is provided on an upper portion of the dome frame, swingable on the dome frame, and is opened downward toward a predetermined direction; and a second driving portion which is provided between the dome frame and the swing dome to provide power for swing the swing dome.

A chair includes a base structure, a seat support structure, a back frame comprising a front surface, a rear surface and a forwardly extending bottom portion pivotably connected to the base, a biasing member biasing the back frame from a reclined position toward an upright position, wherein the biasing member is located entirely forward a rearward most edge of the seat support structure, and a back shell comprising a forwardly extending bottom portion connected to the seat support structure, a front surface, a rear surface positioned in front of the front surface of the back frame, a pair of laterally spaced side portions defining an opening therebetween, and a top portion extending laterally between and connected to the side portions, wherein each of the side portions are exclusively connected to the back frame at a first location.

A recliner mechanism includes a base. Returning spring units are disposed on two sides of the base and rockers are disposed on outer sides of the returning spring units. An extending assembly is disposed at the top of each rocker. A drive unit is arranged between the extending assemblies on the two sides and includes a front driving rod. A reciprocating device is disposed at the middle of the front driving rod and a rear driving rod is disposed at an output end of the reciprocating device. Bent members are fixedly connected to two ends of the rear driving rod. Each bent member is pivotally coupled with a driving member I and the middle of the driving member I is pivotally coupled with a driving member II, with the other ends of the driving member I and the driving member II being pivotally coupled with the extending assemblies.

A playground rocker provides a rigid platform with lateral side edges suspended from side rails extending along the lateral side edges of the rigid platform. The rigid platform is suspended using broad flexible belts extending along substantially full lengths of the lateral side edges of the platform with the upper edges of the belts wrapped around the side rails and lower edges attached or wrapped along the lateral side edges of the platform. The broad flexible belts allow the rigid platform to sway side to side in a direction generally perpendicular to the side rails.

An adjustable chair comprising a seat part, a seat back disposed along one side of the seat part, the seat back being configured for supporting at least a person's back or shoulders, a chair base configured for being placed on a floor, at least one adjustable chair feature including a motor capable of being selectively controlled and driven so as to adjust at least one of: the rotation or tilt of the seat part, a vertical distance between the seat back and the one side of the seat part, an angle position between the seat back and the seat part, and a distance between the chair base and the seat part.

Provided is a rocking chair having a seat body for a user to sit on, a support body for supporting the seat body from below, and a connecting mechanism provided between the seat body and the support body to move the seat body along a surface of a sphere centered on a base point above the seat body in response to an external force applied to the seat body. The connecting mechanism is composed of at least three sub-mechanisms, each of which has a circular track section on the support body side, a linear track section on the seat body side, and a connecting section to interlock their movements. The circular track section has a first traveling member and a first guiding member for traveling the first traveling member along a circle. The linear track section has a second traveling member and a second guiding member to make the second traveling member travel along a surface of a concentric sphere centered on the base point and in a linear manner when viewed from a direction parallel to a central axis of the circle wherein the first traveling member travels. The connecting section has a connecting member that is connected at both ends to a first retainer that holds the first traveling member and a second retainer that holds the second traveling member, and at least one of the first retainer and the second retainer is rotatably connected to the connecting member.

Disclosed herein is a cylindrical rocker mechanism including a top assembly having a first cavity, a middle assembly including at least one middle lug aligned with the first cavity to facilitate insertion of a first pin therethrough thereby coupling the top assembly with the middle assembly, a second cavity aligned perpendicularly to the at least one middle lug, a bottom assembly having a horizontal plate, and at least one bottom lug aligned with the second cavity to facilitate insertion of a second pin therethrough thereby coupling the top assembly with the middle assembly, wherein the top, and middle assemblies move and roll in perpendicular directions thereby facilitating a friction dependent, substantially slip-less, omnidirectional, rolling and a tilting motion of the top assembly in response to a force applied by a subject to top assembly.