A telescopic folding chair includes an upper mounting seat, a lower mounting seat and a cushion. The upper mounting seat is hinged with a plurality of support legs, and the lower mounting seat is hinged with a plurality of telescopic arm tube sets. The cushion is mounted on the telescopic arm tube sets. The lower mounting seat is provided with a plurality of inclined guide holes through which the support legs run. The upper mounting seat is rotatably provided with a rotary limiting mechanism, and the lower mounting seat is provided with an avoidance hole. A bottom of the rotary limiting mechanism is provided with a limiting head, and a bottom wall of the lower mounting seat is provided with a limiting portion corresponding to a periphery of the avoidance hole. The rotary limiting mechanism rotates to control the limiting head to be movably limited by the limiting portion.

A leg unit an outer tube with a fixing rod having several rod sections, each has two interconnected curved and straight sides, two curved sides along an axis defining a fixing channel; an inner tube inserted into the outer tube; and a carrier seat fixed to the inner tube, and a limiting seat seated within the carrier set such that the carrier and limiting seats can rotate together, the carrier seat has an axial hole, two stems extending transversely through the hole to restrict one rod section therebetween, the limit seat has a slide hole complementing with and permitting extension of the fixing rod; the inner tube is rotatable relative to the outer tube between an unlocked position, where movement between the inner and outer tubes is permitted and a locked position, where the stems are confined within the channels, thereby preventing movement between the inner and outer tubes.

A leg unit an outer tube with a fixing rod having several rod sections, each has two interconnected curved and straight sides, two curved sides along an axis defining a fixing channel; an inner tube inserted into the outer tube; and a carrier seat fixed to the inner tube, and a limiting seat seated within the carrier set such that the carrier and limiting seats can rotate together, the carrier seat has an axial hole, two stems extending transversely through the hole to restrict one rod section therebetween, the limit seat has a slide hole complementing with and permitting extension of the fixing rod; the inner tube is rotatable relative to the outer tube between an unlocked position, where movement between the inner and outer tubes is permitted and a locked position, where the stems are confined within the channels, thereby preventing movement between the inner and outer tubes.

An adjustable stool is transferrable between a stow position and a use position. The adjustable stool includes at least two arms that are pivotally attached to a base. The at least two arms can pivot between two positions. The adjustable stool also includes a seat platform, upon which a user sits, stands, and/or kneels when the adjustable stool is in the use position. The seat platform can engage the at least two arms when the at least two arms are in an upright or angular position relative to the base. The seat platform is selectively suspendable between the at least two arms at different heights relative to the base. The at least two arms are able to fold flat and be contained in the base when the adjustable stool is in the stow position.

A leg extension apparatus mounted to an existing chair leg to level the chair on an uneven ground is provided. The apparatus includes a bracket assembly having a leg bracket, a first shell bracket coupled to the leg bracket and having a first slot, and a second shell bracket pivotably mounted to the first shell bracket and having a first slot, the first and second shell brackets able to pivotably adjust to an open position to receive the leg of the chair and a closed position to permit the leg of the chair to be enclosed within the first slots of both the first and second shell brackets, and a leg slidably mounted to the leg bracket. The leg slidably adjusts to one of a plurality of locking positions to permit an end of the leg to contact the uneven ground, thereby supporting the chair in a leveled position.

Adjustable height systems that are easy to manufacture, cost effective and simple to use. The systems use a hidden ratchet mechanism to adjust their height without introducing pinch points or other safety concerns. Moreover, because the ratchet mechanisms are hidden, they do not adversely impact the esthetics of the systems.

Adjustable height systems that are easy to manufacture, cost effective and simple to use. The systems use a hidden ratchet mechanism to adjust their height without introducing pinch points or other safety concerns. Moreover, because the ratchet mechanisms are hidden, they do not adversely impact the esthetics of the systems.

A dining chair includes: a pair of support legs having inner surfaces, the inner surfaces defining a pair of slide grooves, each of the slide grooves extending along a direction that is parallel to a surface; a seat having a front end, a rear end, and two opposite sides between the front end and the rear end, one of the sides including a first side, a second side, and a shoulder formed between the first and second sides, the first side slidably received in one of the slide grooves, and the shoulder abutting against a closed end of the one of the slide grooves; and a locking mechanism fixed to the seat adjacent to the one of the sides of the seat, the locking mechanism including a locking member that is to move past the second side and abut against a rear end face of one of the support legs.

A dining chair includes: a pair of support legs having inner surfaces, the inner surfaces defining a pair of slide grooves, each of the slide grooves extending along a direction that is parallel to a surface; a seat having a front end, a rear end, and two opposite sides between the front end and the rear end, one of the sides including a first side, a second side, and a shoulder formed between the first and second sides, the first side slidably received in one of the slide grooves, and the shoulder abutting against a closed end of the one of the slide grooves; and a locking mechanism fixed to the seat adjacent to the one of the sides of the seat, the locking mechanism including a locking member that is to move past the second side and abut against a rear end face of one of the support legs.

A positioner of a chair adjusting device is disclosed. The positioner is formed by stacking a plurality of positioning plates together. Each of the positioning plates is formed with a positioning section, a combination section, and a penetration section. The combination section is formed of a recessed cavity recessed from one surface and a projecting peg projecting from an opposite surface, and an outside diameter of the projecting peg corresponds to an inside diameter of the recessed cavity, so that for two of the positioning plates that are stacked together to be respectively on an upper side and a lower side, the projecting peg of the positioning plate on the upper side is receivable into and fit in the recessed cavity of the positioning plate on the lower side to have the two positioning plates that are stacked together on the upper and lower sides combined together through tight fitting.