Abstract: The presented decor offers broad possibilities for the development of the design and additional functions of the bracelet thanks to the use of a strip of flexible material as a decorative band on the outside and the compensation of the length difference between the band and the bracelet surface when rolling and unrolling the bracelet. The decor is easily, quickly, and conveniently exchanged in any position of the bracelet thanks to positioning with the help of magnetic locks. The additional folding band gives a holistic outer appearance to the non-closed bracelets.

Abstract: The developed construction of the flexible circuit board is distinguished by the presence of compensating folds with a simple topology, which allow the circuit board to be installed in a flexible-hard body in such a way that the integrity of the circuit board is maintained when bending and rolling up, and the lifespan of the device during rolling/unrolling reaches 100,000 cycles and more.

Abstract: The present invention relates to a spring element having two bistable flat springs and two flat connecting elements which are arranged at the longitudinal ends of the bistable flat springs, which are aligned parallel to one another, and connect them to one another.

Abstract: The present invention relates to a wrist encircling folding bracelet comprising a strap and a body connected to the band (2), with a first end module comprising at least two rigid arcuate elements, a reversibly deformable part comprising a multi stable element, the multi stable element assuming a stabilized shape both in a linear orientation and in a rolled-up orientation, and a second rigid module on which the band is arranged, comprising a multi stable element, said multi stable element assuming a stabilized shape both in a linear orientation and in a coiled orientation, and a second rigid module on which said strap is arranged, said strap being freely oscillating with respect to said body.