Abstract: Provided are an ottoman linkage device, a frame body, and a seat. The ottoman linkage device includes an upper link, a lower link, a middle ottoman link, a first front ottoman link, a second front ottoman link, a first connection link, a second connection link, a front ottoman bracket, and a middle ottoman bracket. The upper link or the lower link is rotatable under a driving force to make the ottoman linkage device unfold or fold. By changing the length of the first connection link and the length of the second connection link, the magnitude of the driving force of the first connection link can be adjusted.

Abstract: An interlockingly extending driving mechanism for an electric sofa, including a backrest adjusting assembly provided in a sofa seat frame. A footrest assembly is provided at one end, remote from the backrest, of the backrest adjusting assembly, and the backrest adjusting assembly is connected with the footrest adjusting assembly. The footrest adjusting assembly includes a supporting rod which is vertically and fixedly provided on the surface of one side of the backrest adjusting assembly, a driving unit is provided on the supporting rod, the driving unit is drivingly connected with a transmitting screw, an interlocking unit is movably connected to one end, close to the footrest, of the transmitting screw, the interlocking unit is movably connected with the footrest, and when the transmitting screw drives the interlocking unit to move, the interlocking unit drives the footrest assembly to extend or fold.

Abstract: The present application relates to a sofa backrest adjusting apparatus with integrated headrest and lumbar cushion, which comprises a frame body arranged in a sofa cover, wherein a support rod is arranged in the middle of the frame body, a bearing support frame is arranged on the support rod, and a headrest driving mechanism and a lumbar cushion driving mechanism are arranged on the bearing support frame; the headrest driving mechanism comprises a first power module and a first transmission lead screw, the lumbar cushion driving mechanism comprises a second power module and a second transmission lead screw. According to the present application, when the first transmission lead screw and the second transmission lead screw are broken, only the second transmission lead screw needs to be replaced, so that the maintenance cost of the electric sofa can be reduced.

Abstract: A flip headrest device adapted for a sofa includes a sofa frame and a flip mechanism. The sofa frame includes a sofa frame top and two sofa frame sides that are cooperatively connected. The flip mechanism includes a driver rotatably connected in the sofa frame, a flip lever rotatably connected to the driving member, a planar link mechanism cooperatively connected to both ends of the flip lever, and a headrest portion disposed at an upper end of the sofa frame top. The planar link mechanism includes a crank rod, a first link and a second link. The crank rod has one end being fixedly connected to the flip lever, a middle portion being rotatably connected to the first link, and the other end being rotatably connected to the second link. The first and second links pass through the sofa frame top and are rotatably connected to the headrest portion.

Abstract: A head and waist integrated device includes a bracket body. The bracket body is provided with a headrest flipping mechanism and a waist ejecting mechanism. The waist ejecting mechanism includes a fixing base fixedly connected to the bracket body, a first driver rotatably connected to one end of the fixing base, a folding link assembly respectively rotatably connected to the first driver and the fixing base, and a waist ejecting member rotatably connected to the folding link assembly. The folding link assembly has a plurality of links disposed therein, crossing and rotatably connected to each other.

Abstract: A head and waist integrated device includes a bracket body. The bracket body is provided with a headrest flipping mechanism and a waist ejecting mechanism. The waist ejecting mechanism includes a fixing base fixedly connected to the bracket body, a first driver rotatably connected to one end of the fixing base, a folding link assembly respectively rotatably connected to the first driver and the fixing base, and a waist ejecting member rotatably connected to the folding link assembly. The folding link assembly has a plurality of links disposed therein, crossing and rotatably connected to each other.

Abstract: A flip headrest device adapted for a sofa includes a sofa frame and a flip mechanism. The sofa frame includes a sofa frame top and two sofa frame sides that are cooperatively connected. The flip mechanism includes a driver rotatably connected in the sofa frame, a flip lever rotatably connected to the driving member, a planar link mechanism cooperatively connected to both ends of the flip lever, and a headrest portion disposed at an upper end of the sofa frame top. The planar link mechanism includes a crank rod, a first link and a second link. The crank rod has one end being fixedly connected to the flip lever, a middle portion being rotatably connected to the first link, and the other end being rotatably connected to the second link. The first and second links pass through the sofa frame top and are rotatably connected to the headrest portion.