In one or more embodiments, a folding chair is provided having a frame, a seat operably connected to the frame, a backrest operably connected to the frame, and a counterbalance assembly, among other components. The backrest is configured to move between an upright position and a reclined position. The counterbalance assembly is configured to apply a counterbalance force to the backrest. In one or more arrangements, the counterbalance assembly is configured to provide a counterbalance force to move the backrest to the upright position in absence of an opposing force. In one or more arrangements the counterbalance assembly is configured to hold the backrest at one or more intermediate positions between the upright position and the reclined position. In one or more arrangements the counterbalance assembly is configured to increase the counterbalance force applied to the backrest at one or more intermediate positions between the upright and reclined positions.

A portable chair assembly including first and second chairs and a movable support frame, each chair having a seat and a backrest. Each backrest is adapted (i) to be folded by a user onto its respective seat in a collapsed position and (ii) to be moved away from that seat into a deployed position. The support frame has at least two frame segments, each frame segment having an upper frame portion supporting one of the backrests at pivotable connections with the upper backrest portion of that backrest, and each frame segment being joined to the other frame segment by an upper joint member and a lower joint member. At least one angle member is provided per chair, a backrest end portion of each angle member being fixedly or removably secured to one of the first chair backrest and the second chair backrest, and a frame portion of each angle member restricting movement of the support frame away from the seats to establish a maximum deployment angle in the deployed position. A container, having an opening, is positioned between the first chair seat and the second chair seat. A blanket is placeable through the opening into the container to be stored therein in the collapsed position and deployable from the container in the deployed position.

Disclosed is an underframe with an improved structure. The underframe includes an underframe body, an operating handle, a reclining pull rope and a gas spring pull rope, a cushion back-and-forth moving mechanism being installed on the outer side of the underframe body, the operating handle being installed through a left outer wall of the underframe body at a lower end of the cushion back-and-forth moving mechanism, a backrest installed on a rear end of the underframe body through a backrest connecting rod; and a reclining elastic adjusting mechanism is arranged at a front end of an inner wall of the underframe body, a backrest angle adjusting mechanism is arranged at the inner wall of the underframe body on a right side of the reclining elastic adjusting mechanism, a cushion height adjusting mechanism is fixedly connected in the underframe body.

A system may include a seat assembly. The seat assembly may include a seat base, a seat portion mounted to the seat base, and an armrest assembly configured to be in an up position or a down position. The armrest assembly may include a handle operable by a user to lock or unlock at least one functionality of at least one adjustable seat assembly feature. Operation of the handle may be configured at least to: unlock the at least one functionality of at least one adjustable seat assembly feature while locking the armrest assembly from moving between the up position and the down position.

A portable chair assembly including first and second chairs and a movable support frame, each chair having a seat and a backrest. Each backrest is adapted (i) to be folded by a user onto its respective seat in a collapsed position and (ii) to be moved away from that seat into a deployed position. The support frame has at least two frame segments, each frame segment having an upper frame portion supporting one of the backrests at pivotable connections with the upper backrest portion of that backrest, and each frame segment being joined to the other frame segment by an upper joint member and a lower joint member. At least one angle member is provided per chair, a backrest end portion of each angle member being fixedly or removably secured to one of the first chair backrest and the second chair backrest, and a frame portion of each angle member restricting movement of the support frame away from the seats to establish a maximum deployment angle in the deployed position. A container, having an opening, is positioned between the first chair seat and the second chair seat. A blanket is placeable through the opening into the container to be stored therein in the collapsed position and deployable from the container in the deployed position.

A furniture member may include a seat bottom frame, a seatback frame, and a reclining mechanism. The seatback frame may be movable relative to the seat bottom frame between an upright position and a reclined position. The seatback frame may be coupled to the seat bottom frame by a pair of linkages. The reclining mechanism may include a front support member and a rear support member. The front support member may be attached to the seat bottom frame and the rear support member may be attached to the linkages. The rear support member may be movable relative to the seat bottom frame between a first position when the seatback frame is in the upright position and a second position when the seatback frame is in the reclined position. Movement of the seatback frame between the upright position and the reclined position causes movement of the rear support member.

Disclosed is an underframe with an improved structure. The underframe includes an underframe body, an operating handle, a reclining pull rope and a gas spring pull rope, a cushion back-and-forth moving mechanism being installed on the outer side of the underframe body, the operating handle being installed through a left outer wall of the underframe body at a lower end of the cushion back-and-forth moving mechanism, a backrest installed on a rear end of the underframe body through a backrest connecting rod; and a reclining elastic adjusting mechanism is arranged at a front end of an inner wall of the underframe body, a backrest angle adjusting mechanism is arranged at the inner wall of the underframe body on a right side of the reclining elastic adjusting mechanism, a cushion height adjusting mechanism is fixedly connected in the underframe body.

A system may include a seat assembly. The seat assembly may include a seat base, a seat portion mounted to the seat base, and an armrest assembly configured to be in an up position or a down position. The armrest assembly may include a handle operable by a user to lock or unlock at least one functionality of at least one adjustable seat assembly feature. Operation of the handle may be configured at least to: unlock the at least one functionality of at least one adjustable seat assembly feature while locking the armrest assembly from moving between the up position and the down position.

Embodiments of the present invention provide a dental treatment machine for children. The dental treatment machine may include a base, a cushion and a backrest, where the vertical distance between the base and the cushion, the angle between respective planes of the cushion and the backrest, as well as the horizontal distance between the cushion and the backrest are selectively adjustable according to a child's figure. Preferably, the vertical distance adjustment between the cushion and the base is about 350-730 mm, the angle adjustment between the backrest and the cushion is about 0°˜68°, and the distance adjustment between the backrest and the cushion is about 0˜50 mm.

A swinging chair comprises a frame portion and a seat portion designed to hang within the frame portion. The frame portion comprises a plurality of rigid segments, which are connected by a hub and from which is hung the chair seat portion. In one embodiment, the frame is comprised of multiple segments which can be taken apart for ease of storage and packing while the seat portion may be made of a soft, pliable cloth like material which is supported by a number of straps coupled to two buckles that fit over a knob or other protrusion in the upright seat support frame portion for providing and controlling automatic reclining of the chair seat back portion.