A seat, particularly a rocking chair, includes a frame, a seat surface and a backrest. The frame includes two lower frame parts extending forward from the backrest and each having a curved progression which is convex in downward direction. The seat can have with stop members arranged close to a front outer end and/or close to a rear outer end of each lower frame part. The stop members can be resiliently deformable. Additionally or alternatively the lower frame parts can each be covered on an underside thereof with a resilient and/or damping material. This resilient and/or damping material can comprise a shaped part connected to the relevant frame part. The stop members can be integrated in the shaped part. A stop member and a shaped part intended for application in such a seat.

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 chair may include a base defining a vertical axis of the chair, a seat configured to support a user thereon, and a seat support assembly disposed between the base and the seat in the direction of the vertical axis. The seat support assembly may include a height adjustment assembly configured to allow the seat to translate along the vertical axis, and a wobble assembly configured to allow the seat to tilt relative to the vertical axis in a side-to-side direction. The wobble assembly may include a wobble lock having a locked configuration, in which the wobble lock inhibits tilting of the seat relative to the vertical axis in the side-to-side direction, and an unlocked configuration, in which the wobble lock allows tilting of the seat relative to the vertical axis in the side-to-side direction.

A chair may include a base defining a vertical axis of the chair, a seat configured to support a user thereon, and a seat support assembly disposed between the base and the seat in the direction of the vertical axis. The seat support assembly may include a height adjustment assembly configured to allow the seat to translate along the vertical axis, and a wobble assembly configured to allow the seat to tilt relative to the vertical axis in a side-to-side direction. The wobble assembly may include a wobble lock having a locked configuration, in which the wobble lock inhibits tilting of the seat relative to the vertical axis in the side-to-side direction, and an unlocked configuration, in which the wobble lock allows tilting of the seat relative to the vertical axis in the side-to-side direction.

An embodiment includes a user-stabilized stool having a bottom portion for contacting a ground surface that is configured to be inherently unstable when in an active position, thereby requiring a user to stabilize the stool when in the active position. The stool further includes a seat portion connected to the bottom portion and a stabilizing member operable, when the bottom portion is in the active position, to prevent the user-stabilized stool from tilting beyond a predetermined angle.

An embodiment includes a user-stabilized stool having a bottom portion for contacting a ground surface that is configured to be inherently unstable when in an active position, thereby requiring a user to stabilize the stool when in the active position. The stool further includes a seat portion connected to the bottom portion and a stabilizing member operable, when the bottom portion is in the active position, to prevent the user-stabilized stool from tilting beyond a predetermined angle.

A children's seat and rocker apparatus includes a rocker base, a support assembly, and an elevational support and adjustment mechanism operable between the rocker base and the support assembly to provide support and positional adjustment of the head end of the support assembly. The support and adjustment mechanism is detachable from the support assembly to allow the apparatus to be folded into a collapsed configuration for compact storage and transport.

[Problem] Provided is a chair capable of changing an operation of a movable part between allowed and suppressed states, without causing an up-down movement of a seat or without requiring a complicated structure relying on a back. [Solution] For that purpose, a weight-receiving part 50, the height position of which changes due to a person sitting on a seat surface, is provided on a seat 5, the change of the height position is mechanically transmitted to a control mechanism 8X configured to control an operation of a front-rear swing part 3 being the movable part, and the control mechanism 8X changes an operation of the front-rear swing part-3 being the movable part between allowed and suppressed states.

A tilt locking device for a chair, comprising a housing configured for connection to one of a seat and a frame; a first rotatable locking member, rotatable about a first axis and biased in a first direction about the first axis, the first rotatable locking member is configured for interlocking with a notch member; a rotatable activation member, rotatable about a second axis, the rotatable activation member is configured to abut and rotate the first rotatable locking member in a second direction opposite the first direction into interlocking with the notch member.