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 rockable folding chair comprises a chair frame, a reclining cushion, and two rocker assemblies, wherein the chair frame includes a left folding chair frame and a right folding chair frame which are symmetrically arranged and are connected through a middle foldable connection frame, and the two rocker assemblies are respectively symmetrically arranged on the rear sides of the left folding chair frame and the right folding chair frame; each rocker assembly includes an upper rocker, a torsional spring, a lower rocker, and a bottom tube, wherein the lower end of the upper rocker and the upper end of the lower rocker are respectively connected with two ends of the torsional spring, and the lower end of the lower rocker is rotationally connected with the rear end of the bottom tube which is arranged on the ground; the left folding chair frame and the right folding chair frame have bottoms respectively rotationally connected with the bottom tubes as well as rear upper ends respectively articulated to the upper rockers; pluggable back tubes are respectively arranged at rear top ends of the left folding chair frame and the right folding chair frame; and two sides of the upper part of the reclining cushion are respectively fixed to the two back tubes, and two sides of the lower part of the reclining cushion are respectively fixed to the left folding chair frame and the right folding chair frame. The rockable folding chair can be horizontally folded leftwards and rightwards and can rock forwards and backwards, thereby having reliable rocking performance and being convenient to carry.

A chair support shell has an integral back portion, seat portion, and joining portion between the back portion and the seat portion. At least a major portion of the support shell comprises a compliant structure, the compliant structure having a plurality of cells interconnected by a plurality of resilient members. The compliant structure provides compliance in the seat portion, compliance in the back portion, and compliance in the joining portion. The compliant structure enables recline of the back portion relative to the seat portion.

A rockable folding chair comprises a chair frame, a reclining cushion, and two rocker assemblies, wherein the chair frame includes a left folding chair frame and a right folding chair frame which are symmetrically arranged and are connected through a middle foldable connection frame, and the two rocker assemblies are respectively symmetrically arranged on the rear sides of the left folding chair frame and the right folding chair frame; each rocker assembly includes an upper rocker, a torsional spring, a lower rocker, and a bottom tube, wherein the lower end of the upper rocker and the upper end of the lower rocker are respectively connected with two ends of the torsional spring, and the lower end of the lower rocker is rotationally connected with the rear end of the bottom tube which is arranged on the ground; the left folding chair frame and the right folding chair frame have bottoms respectively rotationally connected with the bottom tubes as well as rear upper ends respectively articulated to the upper rockers; pluggable back tubes are respectively arranged at rear top ends of the left folding chair frame and the right folding chair frame; and two sides of the upper part of the reclining cushion are respectively fixed to the two back tubes, and two sides of the lower part of the reclining cushion are respectively fixed to the left folding chair frame and the right folding chair frame. The rockable folding chair can be horizontally folded leftwards and rightwards and can rock forwards and backwards, thereby having reliable rocking performance and being convenient to carry.

A chair according to the present invention includes: a leg 1; a leg support pole 13; a support base 4; a movement mechanism 5 located below a seat 2, the movement mechanism 5 provided with plural movement parts 5A, 5B configured to allow the seat 2 to move in a certain area along a predetermined trajectory in a front-rear and left-right directions between the support base 4 and the seat 2, the movement mechanism 5 being a support mechanism configured to support the seat 2 so that the seat 2 moves in the front-rear direction and left-right directions; and plural cover members 71, 72 arranged corresponding to the plural movement parts 5A, 5B. The plural cover members 71, 72 are configured to move relatively in accordance with movement of the plural movement parts 5A, 5B and cover the support mechanism 5.

A chair according to the present invention includes: a leg 1; a leg support pole 13; a support base 4; a movement mechanism 5 located below a seat 2, the movement mechanism 5 provided with plural movement parts 5A, 5B configured to allow the seat 2 to move in a certain area along a predetermined trajectory in a front-rear and left-right directions between the support base 4 and the seat 2, the movement mechanism 5 being a support mechanism configured to support the seat 2 so that the seat 2 moves in the front-rear direction and left-right directions; and plural cover members 71, 72 arranged corresponding to the plural movement parts 5A, 5B. The plural cover members 71, 72 are configured to move relatively in accordance with movement of the plural movement parts 5A, 5B and cover the support mechanism 5.

A chair support shell has an integral back portion, seat portion, and joining portion between the back portion and the seat portion. At least a major portion of the support shell comprises a compliant structure, the compliant structure having a plurality of cells interconnected by a plurality of resilient members. The compliant structure provides compliance in the seat portion, compliance in the back portion, and compliance in the joining portion. The compliant structure enables recline of the back portion relative to the seat portion.

A chair support shell has an integral back portion, seat portion, and joining portion between the back portion and the seat portion. At least a major portion of the support shell comprises a compliant structure, the compliant structure having a plurality of cells interconnected by a plurality of resilient members. The compliant structure provides compliance in the seat portion, compliance in the back portion, and compliance in the joining portion. The compliant structure enables recline of the back portion relative to the seat portion.

A chair includes: a leg 1; a seat 2; and a front-back support mechanism 4. The front-back support mechanism 4 is provided at a seat receiving part 50 directly supported by the leg 1, and the front-back support mechanism includes: a wavy plate 56 provided to horizontally extend from vertical walls 51 of the seat receiving part 50 and having mound-shaped surfaces 57, 58 each convexly curved upward; and followers 53, 54 provided at front-back support bodies 52 as supported parts and configured to move relative to the mound-shaped surfaces 57, 58 while contacting the mound-shaped surfaces 57, 58. The wavy plate 56 is associated with the followers 53, 54 such that a movement end inclines downward when the seat 2 moves from a neutral position in accordance with a relative movement between the mound-shaped surfaces 57, 58 and the followers 53, 54.

A chair includes: a leg 1; a seat 2; and a front-back support mechanism 4. The front-back support mechanism 4 is provided at a seat receiving part 50 directly supported by the leg 1, and the front-back support mechanism includes: a wavy plate 56 provided to horizontally extend from vertical walls 51 of the seat receiving part 50 and having mound-shaped surfaces 57, 58 each convexly curved upward; and followers 53, 54 provided at front-back support bodies 52 as supported parts and configured to move relative to the mound-shaped surfaces 57, 58 while contacting the mound-shaped surfaces 57, 58. The wavy plate 56 is associated with the followers 53, 54 such that a movement end inclines downward when the seat 2 moves from a neutral position in accordance with a relative movement between the mound-shaped surfaces 57, 58 and the followers 53, 54.