The chair has a simple structure in which a seat can follow a free movement of a seated person in front-rear, left-right, and diagonal directions, a burden from an operation by which the seated person balances his or her load can also be reduced, and a movement by which the seated person changes his or her posture stably and continuously can be suitably supported. The chair includes a movement mechanism 3 that causes an upper base unit 31 to swing in a direction of 360 degrees with respect to a lower base unit 32, and a seat 1 attached to the upper base unit 31. The chair further includes a damper mechanism DM that may operate by following a movement in a direction of 360 degrees, as a mechanism separate from the movement mechanism 3, at a position connecting the upper base unit 31 and the lower base unit 32.

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.

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.

A mechanism and method for quickly and easily interchanging various furniture bases with various furniture seats or seat boxes by means of an interlocking connection, such as a multi-part cam assembly. A furniture base can be quickly and easily detached from a particular seat box, and replaced by a different style of furniture base, by means of at least two cam or connector pieces having complimentary interlock mechanisms constructed and arranged to interlock one to another to form a cam or connector. A plurality of interlock mechanisms may be provided, as well as a plurality of positioning elements on respective cam pieces.

A mechanism and method for quickly and easily interchanging various furniture bases with various furniture seats or seat boxes by means of an interlocking connection, such as a multi-part cam assembly. A furniture base can be quickly and easily detached from a particular seat box, and replaced by a different style of furniture base, by means of at least two cam or connector pieces having complimentary interlock mechanisms constructed and arranged to interlock one to another to form a cam or connector. A plurality of interlock mechanisms may be provided, as well as a plurality of positioning elements on respective cam pieces.

A spring mechanism for a rocker assembly is disclosed, the spring mechanism being connected to a rocker mechanism of the rocker assembly to assist a rocker member of the rocker mechanism in returning from a rocking position to a rest position, wherein the spring mechanism comprises two mounting plates opposed at a spacing and two springs connected between the two mounting plates, each of the mounting plates being provided with holding structures for holding each of the springs in place on the mounting plate, wherein a spacer is provided between each mounting plate and each spring to avoid the mounting plate from contacting at least one turn of the spring.

A foldable rocking chair, including a foldable chair frame, a seat cushion cloth and two rocking bars, wherein the seat cushion cloth is detachably installed on the chair frame, and the two rocking bars are installed on left and right sides of the chair frame, respectively; each of the rocking bars includes an upper rocking bar, a torsional spring base, a lower rocking bar and a bottom tube, the upper rocking bar and the lower rocking bar are rotatably connected to both ends of the torsional spring base, and an upper end of the upper rocking bar is rotatably connected to a rear end on the left or right side of the chair frame; and each of the bottom tubes is placed on the ground and includes a front bottom tube and a rear bottom tube.

A mechanism and method for assembling a base to a piece of furniture is provided with at least two cam pieces having complimentary interlock mechanisms constructed and arranged to interlock one to another to form a cam. A plurality of interlock mechanisms may be provided, as well as a plurality of positioning elements on respective cam pieces.

A mechanism and method for assembling a base to a piece of furniture is provided with at least two cam pieces having complimentary interlock mechanisms constructed and arranged to interlock one to another to form a cam. A plurality of interlock mechanisms may be provided, as well as a plurality of positioning elements on respective cam pieces.

A mechanism and method for quickly and easily interchanging various furniture bases with various furniture seats or seat boxes by means of an interlocking connection, such as a multi-part cam assembly. A furniture base can be quickly and easily detached from a particular seat box, and replaced by a different style of furniture base, by means of at least two cam or connector pieces having complimentary interlock mechanisms constructed and arranged to interlock one to another to form a cam or connector. A plurality of interlock mechanisms may be provided, as well as a plurality of positioning elements on respective cam pieces.