A kit for articulated connection between dividing panels having a pair of male pieces with a coupling protrusion; and a pair of female pieces with a coupling hole, the protrusions engage the holes when relative vertical movement between the pair of male and female pieces is produced when fixed to the panels. One of the first or second pair of pieces is configured with a depression such that the coupling protrusion or the coupling hole is arranged in the groove. The kit includes an auxiliary piece with a retaining pin actuatable with a lever and with an angled end, fixable to the lateral wing of one of the male pieces, the pin remaining parallel to the lateral wing and outside the panel. Regulated by the lever, the angled retaining end of the pin can be arranged in at least two positions: a release position and a locking position.

A releasable hinge assembly includes a mounting bracket, a hinge bracket, and at least one spring biased locking mechanism. The mounting bracket having a first mounting plate and two pin tabs extending therefrom, at least one of the pin tabs defining a through hole therein. The hinge bracket having a second mounting plate and a knuckle extending therefrom. The knuckle defining at least one cutout that is L-shaped. The at least one spring biased locking mechanism having a pawl arm and a pin. The at least one locking mechanism positioned within a channel of the hinge bracket with the pawl arm positioned within and projecting from the at least one cutout. The pawl arm configured to move within the at least one cutout to push the pin beyond a second end of the knuckle and through a through hole defined in the pin tab of the mounting bracket.

The invention presents an innovative design for door hinge systems to eliminate excessive spacing between the door and jamb, offering use of the hinge system in more limited spaces. The invention also allows use of a hinge system for use in hidden or secret panel doors. The invention comprises a bottom hinge assembly comprising an axial load arm capable of distributing weight, and a top hinge assembly comprising a releasable hinge pin to provide a high degree of customization for users.

The charging lid structure includes a charging lid having a lid-side bearing portion provided on a lid-side hinge portion engaged with the main body side and having a lid-side bearing portion in which a lid-side pin hole is formed on a side surface, a body side hinge portion having a main body-side bearing portion in which a main body-side pin hole communicating with the lid-side pin hole is formed on a side surface, a rotary shaft in which a shaft-side pin hole communicating with the lid-side pin hole is formed in the shaft portion, and the shaft portion is inserted into the lid-side bearing portion and the main body-side bearing portion, and rotatably supports the lid-side hinge portion and the body side hinge portion, and a fixing pin that can be inserted into and removed from the main body-side pin hole, the lid-side pin hole, and the shaft-side pin hole.