A joining device with minimum visibility for parts of furniture and furnishing items, in particular connecting a first panel to a second panel, which must be moved towards each other in an approach direction to bring the edge of one panel buffered in a tightening position against a surface of the other panel, includes a blocking group and a connection group assembled on the panels. The blocking group is inserted inside a seat contained in the thickness of the panel on which the blocking group is applied, and the seat has a longitudinal axis perpendicular to the approach direction, and extending from an edge towards the inside of the panels.

A joining device between components of an item of furniture, including a casing having a first and a second radially expandable portion for engaging the components of the item of furniture, a tie-rod housed inside the casing and axially slidable, and a cam element housed in said casing for axially displacing the tie-rod from the rest position to the locking position and vice-versa. According to the present invention, the cam element has a lobe along its outer periphery which has a forward profile having a predefined extension about the axis of rotation such as to perform, alone, the displacement of the tie-rod with respect to the casing from the rest position to the locking position so as to actuate the expansion of both portions with a single movement according to a forward rotation direction of the cam element and any return through a movement according to a return rotation direction.

A fastening element (20) is provided for use with a tightening element (14) in a device for forming a joint between two panels (18,22). The fastening element is elongate and has a head (13) at one end for engaging the tightening element, an expander (15) at the other end and a shank (11) extending there between. The fastening element further comprises a sleeve (10) having an expandable section (16) at one end extending over the expander, with the expander operatively engaging the sleeve to cause outward movement of its expandable section upon axial displacement of the fastening element relative to the sleeve. The sleeve is provided with at least one outwardly facing cutting edge (19) on its expandable section. The cutting edge has sufficient strength to cut into the panel material in use of the device, when the expandable section is inserted into a face hole in a first one of the panels.

A cam-lock fastening system is designed to accommodate a tolerance stackup to fasten a pair of rigid structures. A spring allows some longitudinal motion of the pin that would not be accommodated by the rigid structures or metal cam-lock and pin. The spring-loaded pin is also suitably designed to produce a preloaded structural joint that is between specified minimum and maximum loads for any tolerance stackup that is within specification. The fastening of the structures requires no manual adjustment of the pin, and facilitates blind connection of a high-fidelity electrical connector. Further, the described cam-lock fastening system is designed for high performance applications requiring preload forces in the thousands of pounds per square inch.

A joining device for parts of furniture and furnishing accessories, including a casing or container body suitable for being inserted in a seat formed in one of the components of the item of furniture to be joined and provided with an expansion bushing externally projecting with respect to an open end of the casing or container body and suitable for engaging with a further seat of a further component of the item of furniture to be joined to the component wherein the casing or container body is inserted, the joining device which includes a cam mechanism for a linear and reciprocated motion of an actuation unit co-operating in an expansion deformation movement of the expansion bushing and in a backward and traction movement of the same expansion bushing, with the cam mechanism and the actuation unit housed in the casing or container body and actuated by a tool.

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 joint for use in a piece of furniture or other furnishing item with a shoulder and a shelf, stably interconnected by the joint perpendicularly to each other, is maneuvered with an actuation and blocking system. The joint includes a pin with a fixing element, which becomes at least partially inserted in holes defined in the shoulder and the shelf, the pin having a side hole for receiving a shaped stem that extends from the actuation and blocking group of the joint. The actuation and blocking group has a 90° transmission between a maneuvering point, which is accessible from the front of the furniture, and the shaped stem, which is inserted in the side hole of the pin. Reciprocal retention elements, provided between the pin and the actuation and blocking group, withhold the pin in the hole of the shelf housing the pin.

A connector for connecting without tools two panels has a pot-like housing with a radially outwardly protruding expansion sleeve. A clamping lever supported in the housing pivots about a pivot axis between a non-tensioned starting position and a tensioned end position. A tensioning contour extends eccentrically with respect to the pivot axis. A tension bolt has a bolt shaft, with a first bolt end being a first bolt head which is thickened with respect to the bolt shaft and is in the expansion sleeve. A second bolt end being a second bolt head is thickened with respect to the bolt shaft and is arranged inside the housing. The second bolt head is engaged from behind by the eccentric tensioning contour of the clamping lever in the tensioned starting position and is pulled in the direction away from the expansion sleeve. The expansion sleeve is expanded by the first bolt head.

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.

Provided is a lock, including a locking module and a driving module. The locking module includes a latch mounted on a first main body, an oblique pin ring gear mounted on a second main body and adapted to the latch. A radial thickness of the oblique pin ring gear changes continuously. A first slot is arranged on the latch. The driving module is used for driving the oblique pin ring gear to move in a circular motion, such that on the latch in a closed position the oblique pin ring gear clips to or separates from the first slot. The lock mechanism can realize inward or outward arcuate connection and planar connecting without finishing.