A chair comprises a base, a seat, a backrest, an operating unit, and a footrest. A first shaft is pivotably connected to a rear end of the seat. The operating unit includes a transmission member, a spring, and a first motor. An end of the transmission member is connected to the seat. An end of the spring is connected to another end of the transmission member. Another end of the spring is connected to the seat. The first motor has an end connected to the seat. The footrest is pivotably connected to a front end of the seat and incudes a second shaft interlocked with the transmission member. The first motor is operable in a direction to cause pivotal movement of the first shaft and to displace the transmission member to cause pivotal movement of the second shaft while stretching the spring, thereby moving the footrest to an extended position.

Provided are an elderly chair support and an elderly chair. A support assembly of the elderly chair support includes a support plate (41) and an anti-torsion tube (42) fixedly connected to the support plate (41); two ends of a first lifting rod (6) are pivoted to the support plate (41) and a base (1) respectively, and two ends of a second lifting rod (7) are pivoted to the support plate (41) and the base (1) respectively; and a first drive assembly is capable of driving a power rod (3) to rotate relative to the support plate (41) to have a first position and a second position, in the case where the power rod (3) is at the first position, a leg assembly (5) stretches and the anti-torsion tube (42) abuts against the base (1), in the case where the power rod (3) is at the second position, the leg assembly (5) retracts and the anti-torsion tube (42) has a first distance from the base (1), and in the case where the power rod (3) is at the second position, the first drive assembly is capable of driving the power rod (3) to drive the support plate (41) to move synchronously so that the support plate (41) has a second distance from the base (1). The elderly chair support and the elderly chair have high stability and are simple in structure.

A chair having a chair base comprises a retractable foot support which is movable between a fully retracted or stowed position at which the foot support is disposed beneath the chair base framework, and a fully extended or deployed position at which the retractable foot support projects outwardly from the chair base framework so as to be disposed in front of the chair. In this manner, the retractable foot support is able to comfortably support the feet of a person seated within the chair when the chair is stationary, as well as to comfortably support the feet of the person seated within the chair when the chair is being moved from one location to another location.

The present application discloses a multifunctional iron frame and seat, including a driving mechanism, a leg support mechanism, and a linkage mechanism. The leg support mechanism includes a leg support skeleton and a support plate. The linkage mechanism is connected between the driving mechanism and the leg support skeleton. When the multifunctional iron frame is rotated from a sitting state to a first position, the leg support skeleton rotates relative to the seat frame, and a rotation radius of the support plate at the first position is not greater than in the sitting state. When the multifunctional iron frame is rotated from the first position to a lying state, the leg support skeleton rotates relative to the seat frame and the support plate slides relative to the leg support skeleton. The rotation radius of the support plate in the first position is smaller than that in the lying state.

Disclosed in the present disclosure is a support structure and a seat, relating to the technical field of mechanical structures, including a seat frame assembly, a footrest assembly, and a motion-driving assembly, wherein the support structure further includes a first reset elastic member provided on the seat frame assembly and connected to the motion-driving assembly or the footrest assembly, and the first reset elastic member applies a reset elastic force to directly or indirectly drive the footrest assembly to rotate with respect to the seat frame assembly to retract. The support structure and the seat provided in the present disclosure adopts a first reset elastic member to assist footrest retraction, reducing a force required to retract the footrest assembly, with fast retraction speed, providing advantages of convenience, labor-saving and swiftness.

Provided is a sofa extension apparatus. The sofa extension apparatus includes a sofa frame, extension brackets, a first linkage rod, a second linkage rod and a linear drive assembly. Each extension bracket includes a sofa fixing member and a leg portion extension assembly, the sofa fixing member is connected to the sofa frame, the leg portion extension assembly is rotatably connected to a front end of the sofa fixing member. Two ends of the first linkage rod are fixedly connected to rear ends of two sofa fixing members respectively. Two ends of the second linkage rod are connected to two leg extension assemblies respectively. The linear drive assembly is configured to drive the first linkage rod and the second linkage rod to move relative to each other, so as to enable the two extension brackets to be extended or retracted.

A new and improved powered chair is provided with an anti-pinch system which comprises an angular sensor mounted upon the footrest assembly for detecting angular movement of the footrest assembly, from a horizontal mode to a vertical mode, prior to the footrest assembly encountering a seat assembly of the chair, which would indicate that the footrest assembly has encountered a foreign object, whereby the angular sensor can emit a control signal so as to terminate/reverse movement of said footrest support assembly. Anti-pinch sensor strips can also be used in conjunction with the angular sensor.