A dual-purpose work chair includes a base frame including a transverse portion, a longitudinal portion vertically located on the transverse portion and a plurality of rollers provided at the bottom side thereof, a first pivoting frame pivotally connected to the transverse portion and protruding beyond the base frame and biasable between a horizontal position and a vertical position, a lower seat cushion located on the first pivoting frame, a second pivoting frame pivotally connected to the longitudinal portion and biasable from a vertical position to a horizontal position across the first pivoting frame, and an upper seat cushion located on the second pivoting frame.

A work chair includes a base frame including a transverse portion, a longitudinal portion vertically located on the transverse portion and a plurality of rollers provided at a bottom side thereof, a first pivoting frame pivotally connected to the transverse portion and biasable between a horizontal position and a vertical position, a second pivoting frame including a bottom support portion and a top support portion. The top support portion has one end thereof pivotally connected to the longitudinal portion of the base frame such that the second pivoting frame can be biased to move the top support portion from a vertical position to a horizontal position where the second pivoting frame is placed across the first pivoting frame.

The invention relates to a one-piece suspension device for interposing between a mattress and a support structure. The device includes a platform defining a bearing plane for the mattress, a fastener point for fastening to the support structure, and a resilient section. The resilient section is more resilient than the platform in a direction perpendicular to the bearing plane and it is interposed between the platform and the fastener point in the direction perpendicular to the bearing plane to absorb compression forces. The one-piece suspension device is shaped such that any axis perpendicular to the bearing plane and passing through the one-piece suspension device intersects the one-piece suspension device along a single intersection segment. The resilient section has at least two elastic hinges with different flexibilities.

An activating platform is disclosed. The platform includes a base that has a lower surface that is curved in a direction transverse to a longitudinal axis. The curved shape of the base provokes a user rock around in a small angle around a middle position, thereby promoting active sitting.

A leg unit for a wearable sitting posture assisting device, comprises an upper support designed to receive a weight force of a person, a lower support designed to transmit the person's weight force to a ground, a joint connecting the at least two supports to each other, and a blocking means implementing a blocked state to block the joint at at least one sitting angle corresponding to an at least partly sitting posture, the leg unit comprising a guiding means for the blocking means, which guiding means is designed to allow a rotation of the joint while the blocking means is in the blocked state, to a wearable sitting posture assisting device, comprising two of these leg units, and to a method to block such a wearable sitting posture assisting device in an at least partly sitting posture.

A swing stool table kit has components to form a swing stool table. The swing stool table has a table top and pairs of swing stools on opposite sides of the table top. The swing stools swing out for a person to sit on and swing in for storage. The swing stools are made from light weight cast aluminum so that the overall weight of the kit is low. The table has footplates that extend out beyond the edge of the table but not beyond the swing stools when they are swung out so that the table will not tip over when heavier than average people all sit on one side of the table and no one sits on the other side of the table.

A work chair includes a chair body, a plurality of wheel sets mounted at the bottom side of the chair body, a seat cushion mounted at the top side of the peripheral wall of the chair body, two guide rails mounted at the chair body at one lateral side each defining a longitudinal sliding slot and locating notch in communication with the sliding slot, a tray, a pivot bolt pivotally connecting the tray to the sliding slots of the rail for allowing the tray to be moved along the sliding slots of the guide rails and having an engagement portion for selectively engaging in one locating notch of each guide rail to hold the tray positively at the selected elevational position for carrying tools.

A work chair includes a chair body, a plurality of wheel sets mounted at the bottom side of the chair body, a seat cushion mounted at the top side of the peripheral wall of the chair body, two guide rails mounted at the chair body at one lateral side each defining a longitudinal sliding slot and locating notch in communication with the sliding slot, a tray, a pivot bolt pivotally connecting the tray to the sliding slots of the rail for allowing the tray to be moved along the sliding slots of the guide rails and having an engagement portion for selectively engaging in one locating notch of each guide rail to hold the tray positively at the selected elevational position for carrying tools.

A seat unit for a wearable sitting posture assisting device includes at least one sitting means designed to form an adjustable and/or self-adjusting seat surface to be used in at least one at least partly sitting posture and in a walking mode, and a frame means designed to receive a weight force of a person sitting on the sitting means that is mounted on the frame means, and to a wearable sitting posture assisting device with such a seat unit.

A tiltable stool includes a seat support, a seat, and a tilt mechanism. The seat is mounted to an upper end of the seat support. The tilt mechanism allows the seat to tilt in a desired direction. The tilt mechanism includes a coiled wave spring, an upper spring retainer and a lower spring retainer, a fastener bolt, and a tilt limiter. The upper spring retainer and the lower spring retainer are disposed opposite each other to sandwich the coiled wave spring therebetween. The fastener bolt pivotably holds the upper spring retainer in position. The tilt limiter is disposed inside the coiled wave spring and is secured to either one of the spring retainers. The tilt limiter includes a conical surface thereon which contacts a contact surface when the seat tilts to a predetermined tilt angle. The upper spring retainer is secured to a lower end of the seat support.