There is provided an ergonomic chair which is produced from flat components. The components may be made of paper. The components are designed using parametric equations which take the targeted user's proportions into account. The components are then folded, joined, and coated with strengthening material. The chair has a seat, a base, and three legs connecting the seat to the base. The base contains a counterweight mass for keeping the chair in a default upright position. The base contains an accelerometer which can transmit data to a computing device to track a user's posture and other health-related data.

Disclosed herein are portable, collapsible rocking chairs for outdoor use. These rocking chairs have a plurality of chair arms (each chair arm having a proximal end and a distal end), a removable seat coupled to and supported by the distal ends of the plurality of chair arms, and a rocker assembly for rocking. An exemplary rocker assembly includes two rocker rails, one or more cross bars coupled to the rocker rails, and a plurality of arm ports for removably receiving the proximal end of each chair arm. Some rocker assemblies also include one or more hubs coupled to each rocker rail. The chair arms may comprise one or more hollow pole segments and an elastic cord coupling the pole segments and the rocker assembly.

Disclosed herein are portable, collapsible rocking chairs for outdoor use. These rocking chairs have a plurality of chair arms (each chair arm having a proximal end and a distal end), a removable seat coupled to and supported by the distal ends of the plurality of chair arms, and a rocker assembly for rocking. An exemplary rocker assembly includes two rocker rails, one or more cross bars coupled to the rocker rails, and a plurality of arm ports for removably receiving the proximal end of each chair arm. Some rocker assemblies also include one or more hubs coupled to each rocker rail. The chair arms may comprise one or more hollow pole segments and an elastic cord coupling the pole segments and the rocker assembly.

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.

The convertible furniture unit comprises a hinge member pivotally linking first and second furniture portions to allow the first and second furniture portions to relatively pivot relative to each other to adopt a number of different angular relative positions, and a locking mechanism to releasably lock the first and second furniture portion in a given angular relative position. The first and second furniture portions each comprise a number of slats that are intermeshed with and are slidable between the slats of the other one of the first and second furniture portions. Each slat comprises a hinge portion pivotally attached to the hinge member, an arm extending away from the hinge portion and a free extremity opposite the hinge portion. The first and second furniture portions are capable of adopting at least:•a first position wherein the arms of the slats of the first furniture portion extend away from the hinge member and through the arms of the slats of the second furniture portion; and•a second position in which the arms of the slats of the first furniture portion extend away from hinge and away from the arms of the slats of the second furniture portion without crossing or extending through the arms of the slats of the second furniture portion. The first and second positions of the first and second furniture portions are both operable for use of the furniture unit by a user.

The convertible furniture unit comprises a hinge member pivotally linking first and second furniture portions to allow the first and second furniture portions to relatively pivot relative to each other to adopt a number of different angular relative positions, and a locking mechanism to releasably lock the first and second furniture portion in a given angular relative position. The first and second furniture portions each comprise a number of slats that are intermeshed with and are slidable between the slats of the other one of the first and second furniture portions. Each slat comprises a hinge portion pivotally attached to the hinge member, an arm extending away from the hinge portion and a free extremity opposite the hinge portion. The first and second furniture portions are capable of adopting at least:•a first position wherein the arms of the slats of the first furniture portion extend away from the hinge member and through the arms of the slats of the second furniture portion; and•a second position in which the arms of the slats of the first furniture portion extend away from hinge and away from the arms of the slats of the second furniture portion without crossing or extending through the arms of the slats of the second furniture portion. The first and second positions of the first and second furniture portions are both operable for use of the furniture unit by a user.

A crosswise-folding rocking chair having a chair frame and a chair cloth, wherein the chair frame includes two back tubes, two turnover bases, two armrest tubes, four armrest limit sleeves, four bushings, four step rivets, and two base frames, Each base frame is formed by a bent steel tube having a necked end, and the necked end is inserted into a non-necked end to form a closed polygonal frame. The two base frames are riveted together in an X shape, and the polygonal frames have lower arc segments and upper joint segments.

A crosswise-folding rocking chair having a chair frame and a chair cloth, wherein the chair frame includes two back tubes, two turnover bases, two armrest tubes, four armrest limit sleeves, four bushings, four step rivets, and two base frames, Each base frame is formed by a bent steel tube having a necked end, and the necked end is inserted into a non-necked end to form a closed polygonal frame. The two base frames are riveted together in an X shape, and the polygonal frames have lower arc segments and upper joint segments.

Disclosed herein is a dynamic pendula stool possessing a foot, a leg secured to the foot, and a seat secured to the top end of the leg. The leg has a telescopic column that includes a lower part secured to a spherical foot with a diameter of 20-cm or less and an upper part with a free end having an articulation. The articulation has three degrees of freedom and is secured to the underside of the seat so that when a user rests against the seat, the leg forms an angle between 30 and 90 degrees with respect to the horizontal, thereby allowing an isometric contraction of the muscle groups of the lower limbs and of the abdominal girdle in the seated position. The stool is further provided with one or more sensors configured to send data signals to a remote electronic device.