An improved tiltable stool comprises a seat, a body structure, and a base. The base comprises an annular elastic base member having a downwardly convex outer surface and a downwardly concave inner surface. Deformation of the annular elastic base causes a stabilizing force which pushes the tiltable stool towards a normal position when the tiltable stool or chair is tilted out of the normal position. The stabilizing force increases with the weight of a user and provides a consistent dynamic seating experience for users of different weights. An upper section of the annular elastic base is substantially cylindrical and firmly connected to the base structure. The downwardly convex outer surface of a lower section of the annular elastic base member rests on the floor. A contact area between the annular elastic base member and the floor is substantially ring-shaped, and grows outwardly with an increasing weight placed on the seat.

This invention provides a chair leg including a connecting column, a sliding base, and a swinging block; the swinging block includes a positioned swinging block, a ring spring, and a fixed block; the sliding base includes a sliding leg and a connecting block; and the connecting column is fixed to the sliding base via the swinging block. This chair leg is provided with a simple structure, easy production, lower manufacturing cost, and is capable of swinging in a certain angle of 360 degrees and giving users more comfortable seat experience.

A seating device includes a training device connected to a component of the base of the seating device. The training device is configured to tilt the seating device to help a user learn how to use the seating device to help the user avoid losing the user's balance while sitting or leaning on the seat of the seating device when the user initially starts to use the seating device. The training device can be releasable from the base of the seating device after the user has learned how to balance on the seating device. The training device can also be reattachable to the seating device to facilitate the training of other users.

A seating device includes a training device connected to a component of the base of the seating device. The training device is configured to tilt the seating device to help a user learn how to use the seating device to help the user avoid losing the user's balance while sitting or leaning on the seat of the seating device when the user initially starts to use the seating device. The training device can be releasable from the base of the seating device after the user has learned how to balance on the seating device. The training device can also be reattachable to the seating device to facilitate the training of other users.

A support assembly for easy assembly and reliable operation is disclosed. Support assembly includes a plurality of support members, with at least one support member including connecting slot and at least one other support member having a complementary slot. Each slot features at least two tapered faces or walls to provide a wedge effect that ensures a tight reliable fit when the two members are fitted together.

A support assembly for easy assembly and reliable operation is disclosed. Support assembly includes a plurality of support members, with at least one support member including connecting slot and at least one other support member having a complementary slot. Each slot features at least two tapered faces or walls to provide a wedge effect that ensures a tight reliable fit when the two members are fitted together.

A spring actuated rocking mechanism can be attached to the legs of a collapsible chair to allow for the user to rock in the collapsible chair. The mechanism may be attached at the factory or retrofitted to the chair. The rocking mechanism can be attached to the end of a leg or disposed within a leg, having a leg portion above and below the mechanism.

Joint arrangement (10) has a hollow cylindrical receiving cylinder (20) that extends in a cylinder axis direction (Z) and receives one end of a chair column (30) of an active-dynamic wobble chair, the latter movably mounted in a substantially hollow cylindrical outer joint shell (40) composed of joint shell segments (45). Movable mounting of receiving cylinder (20) is achieved by deformable elastic elements (50) arranged to be variable in shape and position in a bearing gap (60) between an outer wall portion (21, 22) of the receiving cylinder (20) and an inner wall portion (41, 42) of the joint shell (40). Receiving cylinder (20) is actuated in a force-dependent manner, whereby shape and/or position of the elastic elements (50) change as viewed in a radial direction (Rs) from changing, preferably reducing, clearance of the bearing gap (60) when the receiving cylinder (20) is actuated in a cylinder axis direction (Z).

A method for generating a rebounding motion between a person and a surface includes the steps of providing a rebounding device comprising front and rear members and a spring mechanism therebetween and moving the front member and the rear member toward and away from one another via the spring mechanism.

A method for generating a rebounding motion between a person and a surface includes the steps of providing a rebounding device comprising front and rear members and a spring mechanism therebetween and moving the front member and the rear member toward and away from one another via the spring mechanism.