Abstract: A device for retracting seat leg at angle, including a leg assembly hinged to a front end of a seat frame mount, both the footrest driving link and the footrest driven link of the leg assembly are hinged to a front end of the seat frame mount respectively, an end of the first footrest link is hinged to the footrest driving link, an opposite end thereof is hinged to an end of the footrest member, an end of the second footrest link is hinged to the footrest driven link, an opposite end thereof is hinged to a middle of the footrest member including a footrest plate mounting surface used to mount a footrest plate, and the footrest plate mounting surface is retracted below the seat frame mount and is oblique with respect to a horizontal plane when the leg assembly is retracted to a limit position.

Abstract: 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.

Abstract: Provided in the present invention are a lower-back supporting apparatus, a backrest supporting frame, and a seating unit. The lower-back supporting apparatus includes a lower-back supporting plate; a lower mounting plate; two supporting structures, provided between the lower-back supporting plate and the lower mounting plate, hinged to the lower-back supporting plate and the lower mounting plate, respectively; and an extendable and retractable part, including an extendable and retractable end hinged to the lower-back supporting plate or the supporting structure, so as to drive the lower-back supporting plate away or close to the lower mounting plate.

Abstract: The present disclosure relates to a mechanical extension apparatus for an extendable chair unit and a chair unit including such mechanical extension apparatus. The mechanical extension apparatus includes: a reclining apparatus that include multiple links attached to the seat, the backrest and the footrest of the extendable seat, and such reclining apparatus is configured to convert the extendable seat between a sitting position and a lying position. The mechanical extension apparatus also includes an actuator that is attached to the reclining apparatus, and the actuator is configured to electronically convert the extendable seat between the sitting position and the lying position.

Abstract: The disclosure discloses a sofa backrest connection structure, including a first member and a second member, the first member includes a first base plate, two guide rails symmetrically arranged on the first base plate, and a limiting part arranged on the first base plate, and the limiting part is provided with a clamping protrusion; the second member includes a second base plate and a first horizontal plate connected to the second base plate, the second base plate includes an insertion part, and the insertion part is provided with a clamping hole matched with the clamping protrusion; after the insertion part is slidably inserted into and fitted with the two guide rails, the clamping protrusion is clamped in the clamping hole; and the first horizontal plate is used for being connected with a sofa seat frame, and the first base plate is used for being connected with a sofa backrest.

Abstract: The present disclosure relates to a mechanical stretching device for a movable seat unit, and a movable seat unit thereof. The mechanical stretching device includes: a linkage support that comprises a support structure configured to support the mechanical stretching device on ground and a linkage structure attachable to a seating portion of the seat unit; a back mechanism that is pivotally connected to the linkage support and is configured to attach to a backrest of the seat unit; and a leg stretching structure including a footrest element, and the leg stretching structure is pivotally connected to the linkage support, and the footrest element is attached to a footrest of the seat unit. The mechanical stretching device is configured to implement a sequential conversion or a reverse sequential conversion of the seat unit from a sitting state to a relaxing state and to a lying state.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The present disclosure relates to a mechanical stretching device for a movable seat unit, and a movable seat unit thereof. The mechanical stretching device includes: a linkage support that comprises a support structure configured to support the mechanical stretching device on ground and a linkage structure attachable to a seating portion of the seat unit; a back mechanism that is pivotally connected to the linkage support and is configured to attach to a backrest of the seat unit; and a leg stretching structure including a footrest element, and the leg stretching structure is pivotally connected to the linkage support, and the footrest element is attached to a footrest of the seat unit. The mechanical stretching device is configured to implement a sequential conversion or a reverse sequential conversion of the seat unit from a sitting state to a relaxing state and to a lying state.

Abstract: A mixing device for mixing at least two particulate materials has a first riser used for loading first particles and a second riser surrounding and being coaxial with the riser and used for loading second particles. The upper part of the first riser extending beyond the top of the second riser. At least a part of the upper part of the first riser and at least a part of the upper part of the second riser being located inside a mixing zone container, such that the first and second particles are delivered to the inside of the mixing zone container by means of the first and second risers respectively and mixed.

Abstract: A device for mixing at least two granular materials has a first lifting tube used for loading first particles and a second lifting tube surrounding and coaxial to the first lifting tube and used for loading second particles. The upper part of said first lifting tube extends beyond the top of said second lifting tube, and at least part of the upper part of the first lifting tube and at least part of the upper part of the second lift tube are located inside a fast bed precipitator, allowing the first and second particles to be transported by means of the first and second lifting tubes to the interior of said fast bed precipitator and mixed.

Abstract: Provided is a modular multilevel converter and a method for synchronizing outputs of sub-modules of the converter. The modular multilevel converter includes sub-modules connected in parallel, and each sub-module generates an output. The modular multilevel converter also includes a controller that is communicatively coupled to the sub-modules. The controller controls a flow of one or more synchronizing signals between the plurality of sub-modules, such that each sub-module receives the synchronizing signals in opposite directions simultaneously, thereby controlling a synchronization of the outputs generated by the sub-modules.

Abstract: The present disclosure relates to a mechanical extension apparatus for an extendable chair unit and a chair unit including such mechanical extension apparatus. The mechanical extension apparatus includes: a reclining apparatus that include multiple links attached to the seat, the backrest and the footrest of the extendable seat, and such reclining apparatus is configured to convert the extendable seat between a sitting position, a TV position, and a lying position. The mechanical extension apparatus also includes an actuator that is attached to the reclining apparatus, and the actuator is configured to electronically convert the extendable seat between the sitting position and the TV position; and the reclining apparatus is configured to convert the extendable seat between the TV position and the lying position by non-electric actuation.

Abstract: [Solution] The present invention relates to a method for partially oxidizing an alkane, including contacting an alkane with a supported catalyst in a presence of an oxidizer to convert the alkane into an aldehyde, wherein the supported catalyst is composed of a bimetallic oxide and a support carrying the bimetallic oxide, and the bimetallic oxide is represented by the following formula and includes oxygen and two metals selected from metals of groups 8 to 10 of the periodic table: AmBnOx wherein the bimetallic oxide and support are each a metal selected from metallic elements of groups 8 to 10 of the periodic table; the bimetallic oxide and support are not the same metallic element; m, n, and x mean amounts ((mmol)) of the bimetallic oxide, the support, and oxygen, respectively, per 1 g of the supported catalyst; m is more than 0 [mmol/g-cat] and less than 1 [mmol/g-cat]; n is more than 0 [mmol/g-cat] and less than 1 [mmol/g-cat]; and x is a value [mmol/g-cat] satisfying oxidation states of the bimetall

Abstract: The present disclosure relates to a mechanical stretching device for a movable seat unit, and a movable seat unit thereof. The mechanical stretching device includes: a linkage support that comprises a support structure configured to support the mechanical stretching device on ground and a linkage structure attachable to a seating portion of the seat unit; a back mechanism that is pivotally connected to the linkage support and is configured to attach to a backrest of the seat unit; and a leg stretching structure including a footrest element, and the leg stretching structure is pivotally connected to the linkage support, and the footrest element is attached to a footrest of the seat unit. The mechanical stretching device is configured to implement a sequential conversion or a reverse sequential conversion of the seat unit from a sitting state to a relaxing state and to a lying state.

Abstract: An extendable seating interconnected mechanism and a seating supporting frame, including an interconnected assembly, a seating frame, and a backrest mount, wherein the backrest mount is rotatably connected to the interconnected assembly and the seating frame, respectively; the interconnected assembly includes a mounting plate and a driving link, wherein the mounting plate includes a lateral-plate part and a supporting part; the driving link is rotatably connected between the seating frame and the lateral-plate part; an end of the supporting part is connected to the lateral-plate part; and an opposite end of the supporting part is rotatably connected to the backrest mount.

Abstract: A mechanically stretchable apparatus for a sofa and a sofa thereof are provided. The mechanically stretchable apparatus includes: a seat component, a linkage component, a back component and a leg component. The seat component further includes a base, a first rotating part, the second rotating part, and the seat linkage structure placed between the first and second rotating parts. The seat linkage structure includes a back linkage with a seat connection point, a transmission connection point, and a back connection point. The seat connection point is connected to the first rotating part. The back connection point is connected to the back component. The back component and the leg component are respectively connected to the linkage component, and the linkage component is connected to the seat linkage structure.

Abstract: The invention relates to a method for regulating the gas velocity of the empty bed in a fluidized bed, wherein solid catalysts are used as fluidized particles or as a part of fluidized particles, characterized in that the gas velocity of the empty bed ? of the reaction zone of the fluidized bed is measured, compared with the bed average catalyst density ? of the solid catalysts in the reaction zone of the fluidized bed, the gas velocity of the empty bed ? being adjusted as required such that the gas velocity of the empty bed ? and the bed average catalyst density ? satisfy the formula (I) below: ?=0.356?3?4.319?2?35.57?+M; wherein M=250?; where ? is provided in m/s and ? is provided in kg/m3. The method can be used for the industrial production of lower olefin.