A plate connecting assembly according to an embodiment includes a first frame, with an upper portion and a lower portion of the first frame making a predetermined angle with each other, and a second frame having a first support portion facing the upper portion and a second support portion facing the lower portion. In the plate connecting assembly, a first fixation-subject object is fixed between the upper portion and the first support portion, a second fixation-subject is fixed between the lower portion and the second support portion, and thus the first and second fixation-subject objects are fixed in such a manner that an angle therebetween is the same as an angle that the upper portion and the lower portion make with each other.

Embodiments of the invention include an apparatus for positioning an electronic display. The apparatus can be combined with an existing work surface to provide a multi-position workstation. In some cases the apparatus includes a mounting portion configured to support an electronic display and a keyboard. The mounting portion may be movable with respect to the work surface between multiple positions, including for example, a sitting position and a standing position. Methods for positioning an electronic display and a keyboard are also included.

A lock catch comprises: a first lock catch portion, comprising: a first housing and a first connection portion arranged in the first housing; and a second lock catch portion, comprising: a second housing, a surface of the second housing includes a first and second insert hole; a rotary draw-bar assembly arranged in the second housing and comprising a draw-bar and rotation portion arranged on the draw-bar, the rotation portion and the first insert hole arranged oppositely, one end of the draw-bar includes a second connection portion matching the first connection portion, another end of the draw-bar includes a fixed connection portion, and the second connection portion connected to the first connection portion by the rotation portion driving the draw-bar to rotate, and a fixed shaft, arranged in the second housing and opposite the second insert hole, the fixed shaft locked with the fixed connection portion by rotating a specified angle.

A barrel for a barrel joint for parts of furniture and furnishing items includes a hollow cylindrical body containing a blocking element and having at least one hole on one of its side surfaces for the passage of a tip of a tool that actuates the blocking element, the hollow cylindrical body also having at least another hole for receiving a pin of the barrel joint.

A dismantlable table includes a tabletop that is fastened by a fastening component to a structure forming a frame, the structure having a lip that lies flat under the tabletop. Each fastening component includes a latch that is rotatable about a vertical axis, having at least one laterally protruding boss, and includes a recess formed under the tabletop that has at least one protrusion facing the axis. In a mounting position, the bosses pass into the recess next to the protrusions, and in a locking position following rotation, the bosses fit above the protrusions, a lower bearing plane of the latch lying under the lip of the structure.

Embodiments of the invention include an apparatus for positioning an electronic display. The apparatus can be combined with an existing work surface to provide a multi-position workstation. In some cases the apparatus includes a mounting portion configured to support an electronic display and a keyboard. The mounting portion may be movable with respect to the work surface between multiple positions, including for example, a sitting position and a standing position. Methods for positioning an electronic display and a keyboard are also included.

An assembly comprising a first furniture component and a second furniture component is disclosed. The first furniture component comprises a spring-loaded detent. The spring-loaded detent is biased axially along a central axis toward a locked configuration. The second furniture component comprises a lock arrangement. The first furniture component and the second furniture component are rotatably connected about the central axis through a rotary range of motion. The lock arrangement is configured to move the spring-loaded detent from the locked configuration to an unlocked configuration during the rotary range of motion, release the spring-loaded detent from the unlocked configuration after the rotary range of motion, and prevent rotation of the spring-loaded detent in the locked configuration after the rotary range of motion.

A doubling-up fitting includes a clamp element with a clamp base and at least two clamp arms rising from the clamp base at its ends. The free clamp ends are angled inward and extend over the clamp base. A rotatably mounted spreading disc is arranged between the clamp base and the free clamp ends. A disc opening leads into a recess in the spreading disc where the diameter is greater than the disc opening diameter. A plurality of outer contour portions spread the free clamp ends radially outward less far in an initial rotational position of the spreading disc than in a final rotational position. An adjusting disc arranged in the recess of the spreading disc has a thread. The outer diameter of the adjusting disc is smaller than the diameter of the recess in the spreading disc and larger than the opening diameter of the disc opening.

A dismantlable table includes a tabletop that is fastened by a fastening component to a structure forming a frame, the structure having a lip that lies flat under the tabletop. Each fastening component includes a latch that is rotatable about a vertical axis, having at least one laterally protruding boss, and includes a recess formed under the tabletop that has at least one protrusion facing the axis. In a mounting position, the bosses pass into the recess next to the protrusions, and in a locking position following rotation, the bosses fit above the protrusions, a lower bearing plane of the latch lying under the lip of the structure.

A tightening element for the tool-free tightening of a clamping bolt includes a cylindrical pot-shaped housing having a pot opening. At the end side of the housing opposite the pot opening, at least one handle is pivotably supported about an axis which extends at right-angles to the center axis of the housing between a folded-up position which protrudes from the housing and a folded-down end position which rests against the end side.