A height adjusting mechanism for a dentistry stool comprises a support member, a movable height adjusting assembly and a pushbutton actuator. The support member is coupleable to the stool adjacent a seat of the stool. The movable height adjusting assembly is selectively movable up and down relative to the support member. The pushbutton actuator is positionable on a side of the movable height adjusting assembly adjacent a seated user, and is manually actuatable by the seated user to release the movable height adjusting assembly from a locked position at a current height to allow the movable height adjusting assembly to be moved to a new height. The height adjusting mechanism can be implemented to provide a height-adjustable seat back and/or a height-adjustable torso bar.

According to an aspect of some embodiments of the present disclosure there is provided a chair including a base component, a seat component connected to the base component by a central hinge, and a back-rest component connected to the seat component by a back hinge, wherein when the chair is in a sitting position, the seat component is lower than the central hinge. Related apparatus and methods are also described.

A pivoting fitting is formed with first pivoting lever that is movable about an axis of rotation in relation to a second pivoting lever, and a blocking device is provided to block a rotational motion of the first pivoting lever in relation to the second pivoting lever in a first direction of rotation and to enable rotational motion in an opposite second direction of rotation in a blocking position. In addition, a switching element enables infinitely variable adjustment of the blocking position to deactivate the blocking device for an adjusting process of the first pivoting lever relative to the second pivoting lever in the first direction of rotation.

An ergonomic chair has a back support member and means for arranging and supporting legs of the user in an asymmetric configuration, with a first leg extending in front of a body of the user and a second leg aligned with or extending behind the body of the user. An angle between the first and second legs in a side view can be at least 30 degrees. The means for arranging and supporting legs can comprise one or more fixed structures that support the first leg in a first orientation, or one or more dynamic structures that can be positioned by the user to support the first leg in a first orientation. In some embodiments, with the legs of the user in the asymmetric configuration, a centerline of the user is offset from a centerline of the back support member with respect to a lateral direction.

A reclining and declining chair, preferably one that rotates with respect to its base, having a chair seat frame or plate and having a vertical or generally vertical member that extends beneath to support is reclined and declined by tilting at least an upper portion of the vertical or generally vertical support. Optionally the chair can also have a reclining backrest and a leg/foot rest that can be raised and lowered. The tilting, reclining, declining and raising and lowering motions are accomplished by drive mechanisms that can be manually powered, electrically powered, fluid driven, etc. with operator controls allowing increased range and ease of reclining, declining plus other desirable advantages with these types of chairs.

Disclosed herein is a collapsible unit for facilitating multiuse of the collapsible unit, in accordance with some embodiments. Accordingly, the collapsible unit may be deployable on at least one surface. Further, the collapsible unit may include a frame. Further, the frame may include a plurality of primary members disposed vertically in relation to the at least one surface. Further, the frame may include at least one secondary member coupled with the plurality of primary members. Further, the collapsible unit may include a seat member disposed in the frame. Further, the seat member may include a seat panel disposed in the enclosure. Further, the collapsible unit may include at least one wheel coupled to the frame. Further, the at least one wheel may be configured for moving the collapsible unit on the at least one surface.

A chair includes a frame unit including a seat frame, a leg rest that is pivotally mounted to the seat frame, and a rest adjusting mechanism that is connected between the leg rest and the seat frame. The rest adjusting mechanism is convertible between an unlocked state, where the leg rest is permitted to pivot relative to the seat frame, and a locked state, where the leg rest is not permitted to pivot relative to the seat frame.

A leg supporter structure for a chair seat plate, in which a leg supporter having a movable structure is mounted on a front end of a frame of a seat plate of a chair so that the leg supporter is rotated according to a user's body shape or posture, thereby softly supporting the user's popliteal part by minimizing pressure applied to the user's popliteal part. The leg supporter structure for a chair seat plate is applied to a chair seat plate to which a mesh member is combined with a frame of a predetermined shape, and includes: a lower frame of a rectangular shape; a U-shaped upper frame mounted along the upper surface of an outer wall of the lower frame; and a leg supporter of a bar shape which is mounted at an open front end of the upper frame to be selectively rotatable through rotary shafts disposed at both ends.

A modular furniture seat assembly comprises a seating portion having a front end, a rear end, a pair of opposing side edges, and a seating connector component on each of the opposing side edges. A back portion is provided and has a lower end, an upper end, and a pair of opposing side edges. The lower end of the back portion connects to the rear end of the seating portion. A pair of lateral support arm assemblies is provided, each having an inner surface and an outer surface, with each of the pair of lateral support arm assemblies having a first arm connector component which is releasably connectable to the seating connector component. The lateral support arm assemblies comprise an armrest portion and a leg portion, with the leg portion supporting the modular furniture seating item when it is an assembled condition.

A portable beach chair for cooling a person while relaxing or basking in a warm environment is provided. The portable beach chair comprises a chair having a body support portion and a back support portion with the back support portion hingedly connected to the body support portion and releasably securable in a desired angular position. A water reservoir secured to the back support portion holds a predetermined amount of water. A showerhead is fluidly connected to the water reservoir with the showerhead positioned above the back support portion and directing a water flow from the water reservoir in a general direction toward both the body support portion and the back support portion. Upon introducing water through the showerhead from the water reservoir, the water flow through the showerhead cools the person thereby eliminating any need for the person to access a hose or go into a waterbody to cool off.