Provided are a chair frame and a chair. The chair frame supports a human waist and back by using a waist support assembly and supports human legs and feet by using a footstool assembly. Meanwhile, when the waist support assembly is unfolded, driven by a second support rod, a second end of a first support rod can swing toward the footstool assembly with a junction between a first end of the first support rod and the second support rod as a rotation center to increase an included angle between a waist support bracket and a seat cushion bracket, that is, increasing an unfolded angle of a backrest and achieving the zero gravity effect. The chair can improve the chair comfort by applying the preceding chair frame.

An electromechanical stretching apparatus of a convertible sofa consisting of a mechanical stretching apparatus and an electric actuator, the mechanical stretching apparatus provided with an electrically-driven connecting rod, where the electric actuator consists of a motor, a motor connecting tube, a motor movable slider, and a motor head fixing part, the motor adopted is a motor with a guide rail, the motor movable slider is installed on the guide rail of the motor, the motor head is rotationally connected through a second rotor shaft to the motor head fixing part fastened on the electrically-driven connecting rod, the motor connecting tube is connected to the motor movable slider through a first rotor shaft and the motor connecting tube is fastened on the mechanical stretching apparatus. The motor connecting tube is fastened on a linkage part of the mechanical stretching apparatus. The first and second rotor shaft are both a bolt.

An electrically operated multi-functional chair comprises a rotatable chair base, a seat, a backrest, and a leg rest. The rotatable chair base is connected to the underside of the seat; the rotatable chair base allows the seat to rotate. The seat has a drive device installed thereunder; the seat and the leg rest are connected through a linkage bar set, wherein the drive device can drive the linkage bar set to fold out the leg rest from below the seat. The backrest is disposed in one side of the seat; the backrest is pivoted to a sliding plate; the sliding plate is connected to the drive device. The drive device is controlled by a controller; the leg rest is pushed by the linkage bar set, which is driven by the drive device, and folded out from below the seat. At the same time, the drive device synchronously drives the sliding plate to move, making the backrest to recline synchronously and to create an effect of reclining/lying.

A glider recliner mechanism is provided that allows a user to attain a zero-gravity fully reclined position, with a seat at an increased pitch. The glider recliner mechanism moves the seat forwardly as the recliner moves from a closed position to an extended position. The glider recliner mechanism pivots about a point lower and more rearward than previous mechanisms as the chair moves from the extended to the fully reclined position, allowing a lower center of gravity for the chair, and increased stability.

The automatically retractable movable seat frame includes at least one stretching device, including a linkage mechanism, including a driving elastic member, a rotating rack, and a linkage rack, the driving elastic member being assembled between the rotating rack and the linkage rack; a leg mechanism, hinged to a front end of the linkage rack, a drag link being hinged between the rotating rack and the leg mechanism; a seat mechanism, hinged to a rear end of the leg mechanism; and a rotating mechanism, connected to the rotating rack, configured to drive the rotating rack to rotate, so that the stretching device is switched between a sitting position and a relaxing position, in which the driving elastic member stretches and retracts with the rotation of the rotating rack, and the rotating rack is driven to rotate, so that the leg mechanism is folded.

A seat bracket includes a base mechanism, an electric motor, a transmission mechanism, and a scissor mechanism, where the transmission mechanism includes a transmission piece, a transmission rod, and a link, the transmission piece and the transmission rod are rotatably connected through the link, the transmission piece is rotatably connected to the scissor mechanism, the transmission rod is rotatably connected to the base mechanism, the electric motor is disposed in the base mechanism, an output end of the electric motor is connected to the transmission rod, and the electric motor is configured to drive the transmission rod to cause the transmission rod to drive the transmission piece and the link to rotate so that the scissor mechanism extends or retracts.

A new and improved powered chair comprises a chair frame, a backrest assembly, a seat assembly, a footrest assembly, a linkage system, and a linear actuator operatively connected, by the linkage system, to the backrest assembly, the seat assembly, and the footrest assembly for actuating the backrest assembly, the seat assembly, and the footrest assembly between various positions. The seat assembly comprises a seat plate having a substantially V or L-shaped configuration wherein a rearward leg of the V or L-shaped seat plate has a distorted or elongated N or Z-shaped configuration which includes a central, substantially horizontally extending section that, along with the seat plate, can accommodate an enlarged chair seat for, in turn, accommodating large or tall chair users.

A footrest extension mechanism, including a first link, a second link, a third link, a fourth link, a first footrest member, a driven rod, a second footrest member, and a footrest connecting member; an end of the second link is hinged to the first footrest member, and an opposite end of the second link is hinged to the first link, in which the first link is used to be hinged to a linkage support of a seat; and an end of the fourth link is hinged to the second footrest member, an opposite end of the fourth link is hinged to the third link, an end of the driven rod is hinged to the first footrest member, and an opposite end of the driven rod is hinged to a middle of the fourth link. The adjustment flexibility and the extending length of the footrest extension mechanism are increased.

A linkage device for implementing no backrest clearance, a supporting frame, a seat unit, and a seat, including a bottom base, a linkage mechanism, a support side plate, and a backrest mechanism; the support side plate is provided with a side plate linkage point and a backrest point; the support side plate is rotatably connected to the linkage mechanism at the side plate linkage point; the support side plate is rotatably connected to the backrest mechanism at the backrest point; the backrest mechanism includes a backrest mounting member and a backrest linkage member; and when the backrest mechanism is retracted to an ultimate position, an included angle between a connecting line between two ends of the backrest mounting member and a connecting line between the backrest point and the side plate linkage point is an acute angle.

An electric seat rack, including a driving assembly, a seat frame support assembly, a backrest assembly and two mechanical extension units symmetrically arranged on the left and right, the backrest assembly being hinged to the seat frame support assembly, each mechanical extension unit comprising a leg-foot assembly and a transmission rod. The two leg-foot assemblies are installed on two sides of the seat frame support assembly and are respectively hinged to one ends of the corresponding transmission rods, the other ends of the transmission rods are hinged to the backrest assembly by backrest transmission rod hinge shafts; two ends of a driving rod are respectively connected to the two leg-foot assemblies; the seat frame support assembly comprises two quadrilateral support frames symmetrically arranged on two sides and a connecting assembly for fixing the two quadrilateral support frames into one. The backrest assembly includes a backrest frame and backrest connecting components.