Abstract: 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.

Abstract: Disclosed are a special tooling and method for electron beam welding of a cavity body and a beam tube of a superconducting niobium cavity. The special tooling includes a first clamping device for fixing a flange and a second clamping device for fixing a semi-cavity body, wherein the first clamping device and the second clamping device are fixedly connected. A pressing ring of the first clamping device is disposed around a beam tube of a superconducting niobium cavity and cooperates with a base plate to clamp and fix the flange. The second clamping device includes clamping arms evenly distributed along a circumference of the semi-cavity body, and each clamping arm includes a second pressing plate axially disposed along the beam tube and a pressing block that is disposed on an end portion of the second pressing plate and fixes an edge of the semi-cavity body.

Abstract: A device rack with a braking function includes a base, a column tube, a mounting member, a plurality of universal rolling members and a brake member telescopically and movably arranged to form the device rack with a braking release state and a braking state. The base achieves centered braking on the support surface by controlling the linked brake member, which facilitates a user to adjust operating state of the device rack to switch between a rotatable and translatable braking release state and a rotatable-only braking state.

Abstract: The disclosure provides an audiovisual device rack comprising a column, an adjustment member and a mounting plate, the mounting plate is connected to the column via the adjustment member, and the adjustment member is used to enable the mounting plate to be arranged swingable left and right relative to the column so as to rotate the adjustment member around a center of a circle of arc-shaped slots relative to the column to adjust an angle of an audiovisual device on the mounting plate.

Abstract: The utility model belongs to the technical field of office and household articles, and particularly, relates to a desktop lifting table. The desktop lifting table includes a tabletop and a lifting mechanism that acts to raise or lower the tabletop, the first arm end of the lifting arm set is hingedly arranged and the second arm end thereof is slidably arranged; and a driving mechanism connected to the second arm end includes a gas spring, a gas spring seat and a manipulating member. The desktop lifting table of the utility model is provided with a gas spring seat below the tabletop to accommodate the gas spring so that its minimum height is very low.

Abstract: An outdoor barbecue tent capable of quick assembling and folding includes a tent body and a shelf. The tent body includes a sunshade part and at least two fixed columns arranged on the sunshade part. A movable column relatively movably mounted to each of the at least two fixed columns, and two diagonal positions of the shelf are mounted with a supporting rod respectively, the supporting rods are connected to the fixed columns, and the shelf is connected to the fixed columns. The structure thereof utilizes the foldability of the folding tent body, the retractability of the movable column, and the convenient mounting of the shelf to achieve the ease assembling of the shelf, and greatly reduces the time of assembling the outdoor barbecue tent capable of quick assembling and folding.

Abstract: The present invention discloses an audiovisual device support and a hanging plate assembly thereof. In the present invention, a fit state between a first hanging plate and a second hanging plate which are arranged detachably relative to each other is adjusted to adjust a fixing height of an audiovisual device relative to a support surface so as to meet diverse use requirements, and the first hanging plate and the second hanging plate are locked relative to each other by a second fixture after being adjusted to a desired height, so that the audiovisual device and the support or the hanging plate assembly are formed as a firmly connected whole.

Abstract: An outdoor barbecue tent capable of quick assembling and folding disclosed in the present invention includes a tent body and a shelf. The tent body includes a sunshade part and at least two fixed columns arranged on the sunshade part. A movable column relatively movably mounted to each of the at least two fixed columns, and two diagonal positions of the shelf are mounted with a supporting rod respectively, the supporting rods are connected to the fixed columns, and the shelf is connected to the fixed columns. The structure thereof utilizes the foldability of the folding tent body, the retractability of the movable column, and the convenient mounting of the shelf to achieve the ease assembling of the shelf, and greatly reduces the time of assembling the outdoor barbecue tent capable of quick assembling and folding. At the same time, the shelf can be detached on the column, thus achieving the technical effect that the folded barbecue tent body is small in size and convenient to carry.

Abstract: A TV bracket is disclosed in the present invention, including a support frame and a frame for installing a TV. The frame is supported by the support frame. The support frame is rotatably or fixedly connected to the frame, and the frame is of a frame body structure. An end frame opening of the frame is provided with a hanging arm for installing the TV, a space in a frame opening behind the hanging arm forms an accommodating space, and a cable management rack is arranged in the accommodating space. In the present solution, the frame is designed into a frame body structure, the space in the frame opening is the accommodating space to facilitate putting in various accessories of the TV, and the TV is installed with the hanging arm, which is convenient to install. The cable management rack is added to manage cables in an orderly manner, which is convenient to use.

Abstract: The utility model belongs to the technical field of office and household articles, and particularly, relates to a desktop lifting table. The desktop lifting table includes a tabletop and a lifting mechanism that acts to raise or lower the tabletop, the first arm end of the lifting arm set is hingedly arranged and the second arm end thereof is slidably arranged; and a driving mechanism connected to the second arm end includes a gas spring, a gas spring seat and a manipulating member. The desktop lifting table of the utility model is provided with a gas spring seat below the tabletop to accommodate the gas spring so that its minimum height is very low.

Abstract: The heterocyclic nitrogenous or oxygenous compounds of formula (A), (B), (C) or (D) formed from dialdehydes, their optical isomers, cis- and trans-isomers, or agrochemically acceptable salts, their preparation methods, agrochemical compositions comprising the compounds and the uses thereof are provided. The compounds and their derivatives have high insecticidal activities to several farming and forestry pests including homoptera and lepidoptera pests, such as aphis, fulgorid, whitefly, leafhopper, common thrips, cotton bollworm, cabbage caterpillar, cabbage moth, cotton leafworm, armyworm and so on.

Abstract: The present invention relates to nitro-containing heterocyclic or ring-opening nitrogenous compounds of formula (A), wherein R1, R2, R3, R4, R5, Y, Z, and W are as defined in the specification. The present invention discloses the preparation and the uses of a novel insecticide. Said compound and the derivatives thereof have high insecticidal activity to farm insects including homoptera and lepidoptera pests, such as aphis, fulgorides, aleyrodids, leafhopper, commom thrips, cotton bollworm, cabbage caterpillar, cabbage moth, cotton leafworm, armyworn and so on.

Abstract: The heterocyclic nitrogenous or oxygenous compounds of formula (A), (B), (C) or (D) formed from dialdehydes, their optical isomers, cis- and trans- isomers, or agrochemically acceptable salts, their preparation methods, agrochemical compositions comprising the compounds and the uses thereof are provided. The compounds and their derivatives have high insecticidal activities to several farming and forestry pests including homoptera and lepidoptera pests, such as aphis, fulgorid, whitefly, leafhopper, common thrips, cotton bollworm, cabbage caterpillar, cabbage moth, cotton leafworm, armyworm and so on.

Abstract: The present invention relates to nitro-containing heterocyclic or ring-opening nitrogenous compounds of formula (A), wherein R1, R2, R3, R4, R5, Y, Z, and W are as defined in the specification. The present invention discloses the preparation and the uses of a novel insecticide. Said compound and the derivatives thereof have high insecticidal activity to farm insects including homoptera and Lepidoptera pests, such as aphis, fulgorides, aleyrodids, leafhopper, commom thrips, cotton bollworm, cabbage caterpillar, cabbage moth, cotton leafworm, armyworn and so on.