A footrest stretching device used for a convertible sofa including a left-side component and a right-side component; the left-side component and the right-side component are each provided with identical parts as follows: a mounting side-plate, a third foot lever and a fourth foot lever, with one end of the third foot lever and one end of the fourth foot lever being rotatably connected to the mounting side-plate; the footrest stretching device includes a first footrest connector connected to the other end of the third foot lever, and a second footrest connector connected to the other end of the fourth foot lever; an outer footrest mounting member is connected to the other end of the first footrest connector; a middle footrest mounting member is connected to the other end of the second footrest connector; a third footrest connector is rotatably connected onto the second footrest connector; a fourth footrest connector is connected onto the third footrest connector; an inner footrest mounting member is rotatably connected to the other end of the fourth footrest connector.

The disclosure provides a sofa, comprising a sofa body, a first folding sofa, a second folding sofa, and two supporting frames, and three forms can be achieved with combined structures of the above components: a fully unfolded state in which both the first folding sofa and the second folding sofa are unfolded; a semi-unfolded state in which the first folding sofa is unfolded and the second folding sofa is folded; and a fully folded state in which both the first folding sofa and the second folding sofa are folded. The use of the sofa is enabled to be diversified and the use performance is improved.

The invention discloses a sofa seat frame, a sofa base assembly, a sofa and a sofa production and assembly process, the sofa seat frame comprises two cross beams arranged at intervals and two longitudinal beams connecting the two cross beams, wherein a plurality of supporting elastic pieces are arranged between the two cross beams; and each longitudinal beam comprises a first supporting plate for supporting a seat cushion and a first side plate arranged at one side of the lower part of the first supporting plate and used for being detachably connected with sofa fabric on the seat cushion. In the sofa seat frame provided by the invention, when the seat cushion is placed on the supporting elastic pieces, the first supporting plates can give a certain supporting force to the seat cushion, so as to improve the sitting comfort of users.

Embodiments of the present disclosure relates to the field of furniture. Provided is a sofa seat stretching device. In the sofa seat stretching device, one end of a second support facing away from a first support, and a second leg rest plate connector are hinged at a fourth hinge point, so that the stretching assembly's stretching speed is reduced in a process of switching from a sitting position state to a lying position state when a driving assembly acts in the same way, and the weightlessness feeling can be effectively avoided. Moreover, the driving assembly drives the stretching assembly so that the process of switching the stretching assembly from the lying position state to the sitting position state is smoother.

A contractible sofa linkage device includes a linkage assembly, a seat frame mount hinged above the linkage assembly, and a leg assembly hinged to a front end of the seat frame mount; an inner side wall of the seat frame mount is provided with a mounting platform, wherein a height of the mounting platform is lower than an upper edge of the seat frame mount, and an angled plane where the mounting platform is positioned is a seat frame mounting surface; the leg assembly includes a footrest link assembly and a footrest member, in which the footrest link assembly is hinged to the seat frame mount, the footrest member includes a footrest plate mounting surface used to mount a footrest plate, and the footrest plate mounting surface is retracted below the seat frame mount when the footrest link assembly drives the footrest member to be retracted to a limit position.

Furniture that is convertible between a seat position and a bed position is described. The furniture includes a first bed section with a first platform supporting a first cushion, and a second bed section with a second platform, a second cushion, and a partition disposed between the second platform and the second cushion. The first platform is configured to pivot relative to the second platform. The first cushion is thicker than the second cushion. When the furniture is in the bed position, a top surface of the first cushion is substantially coplanar with a top surface of the second cushion and the partition is spaced from the second platform by a first distance. In the seat position of the furniture, the distance between the partition and the second platform is less than the first distance.

A mechanism for transforming furniture from a sitting position to a lying down position has right and left jacks with identical design, which are a mirror reflection of each other, connected by a synchronisation mechanism. Each jack has a fastening plate which attaches the jack to the furniture body, angle bars, upper and lower for connecting with the mattresses, a spring and a front pull rod and rear pull rod with centre arms. Each jack has a backrest driving sub-assembly created from a backrest rotation pull rod and support to be connected with the backrest of the furniture, whereas the backrest rotation pull rod is connected in an articulated manner on one end with the bottom end of the rear pull rod, and on the second end is connected in an articulated manner with the support connected in an articulated manner to the fastening plate.

A footrest stretching device used for a convertible sofa including a left-side component and a right-side component; the left-side component and the right-side component are each provided with identical parts as follows: a mounting side-plate, a third foot lever and a fourth foot lever, with one end of the third foot lever and one end of the fourth foot lever being rotatably connected to the mounting side-plate; the footrest stretching device includes a first footrest connector connected to the other end of the third foot lever, and a second footrest connector connected to the other end of the fourth foot lever; an outer footrest mounting member is connected to the other end of the first footrest connector; a middle footrest mounting member is connected to the other end of the second footrest connector; a third footrest connector is rotatably connected onto the second footrest connector; a fourth footrest connector is connected onto the third footrest connector; an inner footrest mounting member is rotatably connected to the other end of the fourth footrest connector.

The invention relates to an analyzing unit (9) for connecting to at least one sensor (12) which can be coupled to sleeping or reclining furniture in order to detect vibrations, movement, and/or sound. The analyzing unit (9) is designed to process and analyze the signals of the at least one sensor (12) and detect physiological parameters (P) of a person using the sleeping or reclining furniture, and the analyzing unit (9) is designed to transmit data to or exchange data with at least one external component. The invention further relates to a method for analyzing signals of at least one such sensor (12) and to sleeping or reclining furniture, in particular a bed (1), comprising at least one such sensor (12).

The invention relates to a mattress (30) for a piece of sleeping or reclining furniture, having at least one sensor (12) arranged in the mattress (30) for sensing vibrations, motion, and/or sound. The mattress (30) is characterized in that the mattress has at least one element for receiving structure-borne sound, to which the at least one sensor (12) is coupled. The invention further relates to a piece of sleeping or reclining furniture, in particular a bed (1), having such a mattress (30).