Abstract: The present disclosure relates to a chair, including: a base; a seat frame rotatably mounted on the base; a footrest bracket and a backrest bracket articulated with the seat frame, where the footrest bracket and the backrest bracket are staggered from a rotation axis of the seat frame relative to the base; a rod-linkage structure, including a first rod-linkage assembly connected between the base and the seat frame, and a second rod-linkage assembly connected between the seat frame and the footrest bracket; and a driving unit, used to drive the first rod-linkage assembly and the second rod-linkage assembly to operate, to link rotation of the seat frame and rotation of the footrest bracket.

Abstract: A coupling mechanism includes a seat frame; a leg rest; a backrest bracket; a carriage slidably connected to the seat frame; a linkage assembly for backrest connected to the backrest bracket, the seat frame and the carriage; a linkage mechanism for leg rest connected to the carriage and the leg rest, so that the leg rest can move toward or away from the carriage; a coupling assembly rotationally connected to the carriage, two ends of the coupling assembly are respectively articulated to the seat frame and the linkage mechanism for leg rest; a drive assembly connected to the carriage, to drive the leg rest and the backrest bracket to move relative to the seat frame; wherein during operation of the drive assembly, the carriage slides relative to the seat frame, and the leg rest and the backrest bracket move and rotate relative to the seat frame.

Abstract: 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.

Abstract: The invention encompasses a recombinant bacterium capable of eliciting an immune response against Streptococcus pneumoniae, a vaccine comprising the bacterium, and methods of using the bacterium.

Abstract: The present invention encompasses a recombinant bacterium comprising a regulated rfaH nucleic acid, as well as a vaccine comprising said recombinant bacterium. Other embodiments of the present invention encompass a recombinant bacterium comprising a regulated rfaH nucleic acid and a regulated rfc nucleic acid, while additional embodiments encompass a recombinant bacterium comprising a regulated rfaH nucleic acid and at least one nucleic acid encoding at least one exogenous antigen.

Abstract: The present invention encompasses a recombinant bacterium comprising a regulated rfaH nucleic acid, as well as a vaccine comprising said recombinant bacterium. Other embodiments of the present invention encompass a recombinant bacterium comprising a regulated rfaH nucleic acid and a regulated rfc nucleic acid, while additional embodiments encompass a recombinant bacterium comprising a regulated rfaH nucleic acid and at least one nucleic acid encoding at least one exogenous antigen.

Abstract: The invention encompasses a recombinant bacterium capable of eliciting an immune response against Streptococcus pneumoniae, a vaccine comprising the bacterium, and methods of using the bacterium.