A butterfly hinge is disclosed comprising a first bracket with an index pin, a second bracket pivotally connected to the first bracket and provided with a pin shaft, and a lever rotatably mounted on the second bracket via the pin shaft. One end of the lever features several inclined first gear notches, while the other end is connected to the second bracket by a spring so that a first gear notch snap-fits onto the index pin under the spring's force. The lever also includes an extension piece slidably movable along its length, with an end extending beyond the lever and provided with an inclined extension slot adapted to mate with the index pin. The second bracket rotates relative to the first up to or near 180 to allow the sofa back to fold onto or near the sofa base's top surface, thus reducing sofa volume for compact packaging and transportation.

A butterfly hinge is disclosed comprising a first bracket with an index pin, a second bracket pivotally connected to the first bracket and provided with a pin shaft, and a lever rotatably mounted on the second bracket via the pin shaft. One end of the lever features several inclined first gear notches, while the other end is connected to the second bracket by a spring so that a first gear notch snap-fits onto the index pin under the spring's force. The lever also includes an extension piece slidably movable along its length, with an end extending beyond the lever and provided with an inclined extension slot adapted to mate with the index pin. The second bracket rotates relative to the first up to or near 180 to allow the sofa back to fold onto or near the sofa base's top surface, thus reducing sofa volume for compact packaging and transportation.

A sofa with an adjustably coupled headrest and backrest includes a base movably connected with a side panel and a coupling sheet for backrest hinged at the side panel, and a backrest assembly including a connection element of backrest with a front end hinged at a rear end of the side panel at an upper position and a connection rod of backrest with an upper end hinged at a rear end of the connection element of backrest, and with a lower end hinged at the coupling sheet for backrest, the base is provided with a drive member to switch a backrest frame to a lying position, and a coupling assembly for headrest configured to force the connection element for headrest to flip relative to a backrest skeleton is provided between the connection rod of backrest and the connection element for headrest.

A sofa with an adjustably coupled headrest and backrest includes a base movably connected with a side panel and a coupling sheet for backrest hinged at the side panel, and a backrest assembly including a connection element of backrest with a front end hinged at a rear end of the side panel at an upper position and a connection rod of backrest with an upper end hinged at a rear end of the connection element of backrest, and with a lower end hinged at the coupling sheet for backrest, the base is provided with a drive member to switch a backrest frame to a lying position, and a coupling assembly for headrest configured to force the connection element for headrest to flip relative to a backrest skeleton is provided between the connection rod of backrest and the connection element for headrest.

The folding couch including: a first bed frame, a second bed frame, a first support assembly and a second support assembly, wherein the first bed frame and the second bed frame are hinged via a hinge, the first support assembly is used for supporting the first bed frame, and the second support assembly is used for supporting the second bed frame. The first support assembly and the second support assembly are foldable and stowable to the first bed frame and the second bed frame.

An electric sofa anti-pinch system and an electric sofa are provided. The electric sofa anti-pinch system includes a thin film pressure sensor, a drive module, and a control module. A triggering mechanism of the thin film pressure sensor is provided in a squeezing risk area of a moving part in the electric sofa; the thin film pressure sensor is configured to output a detection signal when the triggering mechanism is squeezed; the drive module is connected to the moving part and configured to drive the moving part to operate; the control module is respectively connected to the thin film pressure sensor and the drive module and configured to control the moving part to stop operating or reversely operate through the drive module when receiving the detection signal. Embodiments of the present disclosure can improve a reliability of the electric sofa anti-pinch system, enhance an anti-pinch effect.

A futon bed includes a left armrest, a right armrest, and two bed boards. The left armrest and the right armrest are detachably connected to the two bed boards. Each of the two bed boards includes at least two bed board frames and a plurality of elastic units. The plurality of elastic units are divided into at least two groups of elastic units to form a gap between two adjacent groups. Each of the at least two bed board frames includes a notch. Each of the plurality of elastic units includes an upper cover, a base, a spring, a locking member, and a locking matching member enabling a corresponding one of the plurality of elastic units to be fixed in a compressed state from a released state. A connecting support assembly includes a side support rod and a middle support rod.

A futon bed includes a left armrest, a right armrest, and two bed boards. The left armrest and the right armrest are detachably connected to the two bed boards. Each of the two bed boards includes at least two bed board frames and a plurality of elastic units. The plurality of elastic units are divided into at least two groups of elastic units to form a gap between two adjacent groups. Each of the at least two bed board frames includes a notch. Each of the plurality of elastic units includes an upper cover, a base, a spring, a locking member, and a locking matching member enabling a corresponding one of the plurality of elastic units to be fixed in a compressed state from a released state. A connecting support assembly includes a side support rod and a middle support rod.

A futon bed includes two bed boards. The two bed boards are divided into a mattress and a backrest cushion. Each of the two bed boards includes a bed board frame, a plurality of elastic units, and one or more buckling members. An upper cover and a base of each of the plurality of elastic units respectively comprise a locking member and a locking matching member. Each of the one or more buckling members includes one or more releasing portions each of which has an insertion position and a separate position. At the insertion position, the locking member is fixed in a locking position. At the separate position, the locking member is separated from the locking position. The backrest cushion can be in a horizontal state to define a second mattress, and the backrest cushion can be in a vertical state to enable the futon bed to be a sofa.

A futon bed includes two bed boards. The two bed boards are divided into a mattress and a backrest cushion. Each of the two bed boards includes a bed board frame, a plurality of elastic units, and one or more buckling members. An upper cover and a base of each of the plurality of elastic units respectively comprise a locking member and a locking matching member. Each of the one or more buckling members includes one or more releasing portions each of which has an insertion position and a separate position. At the insertion position, the locking member is fixed in a locking position. At the separate position, the locking member is separated from the locking position. The backrest cushion can be in a horizontal state to define a second mattress, and the backrest cushion can be in a vertical state to enable the futon bed to be a sofa.