An adjustable chair comprises chair support, backrest, a backrest support mechanism including at least one backrest arm pivotally connected to the support, and a seat having front and rear regions and a seat surface. The chair includes first and second seat support mechanisms with the first mechanism adjustably connecting the front region of the seat and the second mechanism adjustably connecting the rear region. The second seat support mechanism includes at least one seat arm having front and rear arm extensions and connected to the support for pivotal movement about a horizontal axis. The rear arm extension is pivotally connected to the rear region of the seat. A toggle arrangement is pivotally mounted on the chair support and engages the front end section of the at least one seat arm and front end section of the at least one backrest arm.

A chair back assembly includes a back shell member including laterally extending top, bottom and side portions cooperating to define an open space therebetween, where a portion of the back shell member is located in a lumbar region, a cover having a first surface and a second surface opposite the first surface, wherein the cover covers at least a portion of the open space, and a back frame assembly operably supporting the back shell member and movable between upright and reclined positions, wherein the back frame assembly causes the back shell to flex in a fore-to-aft direction as the back frame assembly is moved between the upright and reclined positions independent of an external force being exerted on the back shell member, and where the lumbar portion of the back shell member remains spaced from the back frame as the back frame is moved between the upright and reclined positions.

The present application discloses a chair with a bi-directional controllable air rod valve including a chair leg, a seat cushion, and a compression air rod that connects the chair leg and the seat cushion, where two sides of a cavity of the seat cushion are each provided with a set of valve control members. The set of valve control members disposed in the cavity of the seat cushion enables a user to adjust the chair with both left and right hands conveniently, which greatly facilitates the operation, and in addition, the hidden design of the valve control members prevents the exposed valve control members from hurting a mover or a user and meanwhile, protects the valve control members.

The present application discloses a chair with a bi-directional controllable air rod valve including a chair leg, a seat cushion, and a compression air rod that connects the chair leg and the seat cushion, where two sides of a cavity of the seat cushion are each provided with a set of valve control members. The set of valve control members disposed in the cavity of the seat cushion enables a user to adjust the chair with both left and right hands conveniently, which greatly facilitates the operation, and in addition, the hidden design of the valve control members prevents the exposed valve control members from hurting a mover or a user and meanwhile, protects the valve control members.

The present application discloses a chair capable of swinging forward and backward, including a chair leg, a seat cushion, and a compression air rod that connects the chair leg and the seat cushion, where a bottom of the compression air rod is provided with a tapered sleeve, the tapered sleeve is disposed inside a cavity of the chair leg, an outer side of the tapered sleeve is enclosed by a soft sleeve, and the compression air rod swings by means of an interaction between the soft sleeve and a cavity wall of the chair leg.

The present application discloses a chair capable of swinging forward and backward, including a chair leg, a seat cushion, and a compression air rod that connects the chair leg and the seat cushion, where a bottom of the compression air rod is provided with a tapered sleeve, the tapered sleeve is disposed inside a cavity of the chair leg, an outer side of the tapered sleeve is enclosed by a soft sleeve, and the compression air rod swings by means of an interaction between the soft sleeve and a cavity wall of the chair leg.

An adjustable rotary rocking chair having a chair frame assembly A, an adjustment mechanism B, and a support tube assembly C, wherein the adjustment mechanism B is detachably connected with the chair frame assembly A and is connected with the support tube assembly C in an insertion manner. The adjustable rotary rocking chair can swing and rotate, has higher flexibility and adaptability due to the fact that the height of the rocking chair and the height of the support tubes can be automatically adjusted by users, is portable through a folding design, and can be used indoors and outdoors.

An adjustable rotary rocking chair having a chair frame assembly A, an adjustment mechanism B, and a support tube assembly C, wherein the adjustment mechanism B is detachably connected with the chair frame assembly A and is connected with the support tube assembly C in an insertion manner. The adjustable rotary rocking chair can swing and rotate, has higher flexibility and adaptability due to the fact that the height of the rocking chair and the height of the support tubes can be automatically adjusted by users, is portable through a folding design, and can be used indoors and outdoors.

A virtual device for the limited pivoting of an object about a base virtual pivot point by means of a pivoting device, where a limiting device is provided for the pivoting angle. The virtual device is a mechanically stable and yet space-saving limiting device that is rotatable about an outer axis on the base and about an outer axis (23′) rotatable on the object, or on the slide, where the limiting device limits the distance and/or the angular position of the two axes relative to one another, with the proviso that the axes always occupy the same plane.

A virtual device for the limited pivoting of an object about a base virtual pivot point by means of a pivoting device, where a limiting device is provided for the pivoting angle. The virtual device is a mechanically stable and yet space-saving limiting device that is rotatable about an outer axis on the base and about an outer axis (23′) rotatable on the object, or on the slide, where the limiting device limits the distance and/or the angular position of the two axes relative to one another, with the proviso that the axes always occupy the same plane.