The present disclosure provides a movable chair support structure including a movable mechanism, a fixing support structure and a chair support structure. The movable mechanism includes a transmission component and a movable component. The chair support structure includes a chair support portion, which has a length of 500 mm to 530 mm. When the movable chair support structure is disposed on the ground, the chair support portion is inclined relative to a direction parallel to the ground. The chair support portion is pivotally connected to the movable component. The movable component is pivotally connected to the fixing support structure. The transmission component is independently pivotally connected to the chair support portion and the movable component, respectively. The transmission component rotates relative to the chair support structure and drives the movable component to move, so as to adjust a position of the chair support structure relative to the fixing support structure.

The present disclosure provides a movable chair support structure including a movable mechanism, a fixing support structure and a chair support structure. The movable mechanism includes a transmission component and a movable component. The chair support structure includes a chair support portion, which has a length of 500 mm to 530 mm. When the movable chair support structure is disposed on the ground, the chair support portion is inclined relative to a direction parallel to the ground. The chair support portion is pivotally connected to the movable component. The movable component is pivotally connected to the fixing support structure. The transmission component is independently pivotally connected to the chair support portion and the movable component, respectively. The transmission component rotates relative to the chair support structure and drives the movable component to move, so as to adjust a position of the chair support structure relative to the fixing support structure.

An adjustable chair includes upper and lower base members, a seat assembly secured to the upper base member, and a chair adjusting mechanism. In an embodiment the upper base member is connected to the lower base member by first and second linking members each having a first end connected to the lower base member and a second end slideably received in corresponding first and second arcuate tracks disposed in the upper base member, such that movement of the second ends into and out of the tracks results in vertical movement of the seat assembly relative to the base. In a further embodiment the seat bottom and seat base comprise cooperating arcuate rails, tracks, and/or bearing members, where cooperative action of the arcuate rails, tracks, and/or bearing members enables the seat bottom to tilt relative to the seat base. In a further embodiment the seat bottom and seat back comprise cooperating arcuate rails, tracks, and/or bearing members, where cooperative action of the arcuate rails, tracks, and/or bearing members enables the seat back to recline relative to the seat bottom.

A medical chair protective barrier and gas distribution system provides a frame that forms a sealed environment for a medical gas delivered to head of a dental chair. The frame fastens to the medical chair, or rolls to head of medical chair. A laminar flow subassembly secures to frame. The laminar flow subassembly includes a vacuum pump, tubing, positive and negative pressure ports, and a vent for delivering medical gas to the head of medical chair. The frame carries a hood that covers the head of medical chair. The hood retains medical gases in a sealed environment, while protecting dentist from contact with medical gases. The hood includes a window and a pair of arm passages that regulates access to inside of hood. Medical armamentarium hangs on frame for access. System has inlet and outlet vacuum ports that utilize HEPA filters and hidden UV lights for disinfecting under the hood.

The present disclosure provides a movable chair support structure including a movable mechanism, a fixing support structure and a chair support structure. The movable mechanism includes a transmission component and a movable component. The chair support structure includes a chair support portion, which has a length of 500 mm to 530 mm. When the movable chair support structure is disposed on the ground, the chair support portion is inclined relative to a direction parallel to the ground. The chair support portion is pivotally connected to the movable component. The movable component is pivotally connected to the fixing support structure. The transmission component is independently pivotally connected to the chair support portion and the movable component, respectively. The transmission component rotates relative to the chair support structure and drives the movable component to move, so as to adjust a position of the chair support structure relative to the fixing support structure.

The present disclosure provides a movable chair support structure including a movable mechanism, a fixing support structure and a chair support structure. The movable mechanism includes a transmission component and a movable component. The chair support structure includes a chair support portion, which has a length of 500 mm to 530 mm. When the movable chair support structure is disposed on the ground, the chair support portion is inclined relative to a direction parallel to the ground. The chair support portion is pivotally connected to the movable component. The movable component is pivotally connected to the fixing support structure. The transmission component is independently pivotally connected to the chair support portion and the movable component, respectively. The transmission component rotates relative to the chair support structure and drives the movable component to move, so as to adjust a position of the chair support structure relative to the fixing support structure.

A seat positioning system includes a base frame having a pair of forward slots and a pair of rear slots, and a seat frame having a front end and a back end. The seat frame is coupled to the base frame and movable relative to the base frame. A first pair of linkages is slideably coupled to the pair of forward slots and connects the frames. A first pair of locking devices has a locked configuration adapted to prevent the first pair of linkages from sliding relative to the pair of forward slots and an unlocked configuration adapted to allow the first pair of linkages to slide relative to the pair of forward slots. A second pair of linkages slideably is coupled to the pair of rear slots and connects the frames. An actuator is pivotally connected to both the seat frame and the base frame and is configured to extend and contract to move the seat frame relative to the base frame.

A seat positioning system includes a base frame having a pair of forward slots and a pair of rear slots, and a seat frame having a front end and a back end. The seat frame is coupled to the base frame and movable relative to the base frame. A first pair of linkages is slideably coupled to the pair of forward slots and connects the frames. A first pair of locking devices has a locked configuration adapted to prevent the first pair of linkages from sliding relative to the pair of forward slots and an unlocked configuration adapted to allow the first pair of linkages to slide relative to the pair of forward slots. A second pair of linkages slideably is coupled to the pair of rear slots and connects the frames. An actuator is pivotally connected to both the seat frame and the base frame and is configured to extend and contract to move the seat frame relative to the base frame.

A foldable multifunction chair including a base for contacting a support surface; a user body support having a support front surface for contacting a user body, the user body support being adjustably pivotably mounted to the base along a transversal axis; a selectively adjustable chair deployment mechanism cooperatively coupled to the base and the user body support, the chair deployment mechanism being configured for selectively adjusting the user body support to a desired angle relative to the base; and a locking mechanism configured for angularly locking the user body support to the desired angle relative to the base. The chair may be used, e.g., as a backrest with an accessory support positioned in front thereof for work, or as a seated workstation wherein the accessory support is positioned adjacent a rear surface of the user body support in a deployed position, and the collapsible seat in a deployed position.

A foldable multifunction chair including a base for contacting a support surface; a user body support having a support front surface for contacting a user body, the user body support being adjustably pivotably mounted to the base along a transversal axis; a selectively adjustable chair deployment mechanism cooperatively coupled to the base and the user body support, the chair deployment mechanism being configured for selectively adjusting the user body support to a desired angle relative to the base; and a locking mechanism configured for angularly locking the user body support to the desired angle relative to the base. The chair may be used, e.g., as a backrest with an accessory support positioned in front thereof for work, or as a seated workstation wherein the accessory support is positioned adjacent a rear surface of the user body support in a deployed position, and the collapsible seat in a deployed position.