In an aspect, there is provided an elastic ring-based ornament making device for constructing an elastic ring-based ornament that includes at least one elastic ring and a plurality of ornamental members positioned thereon. The elastic ring-based ornament making device includes an elastic ring support including a plurality of extension arms which are movable between retracted and extended positions. When the arms are retracted, the elastic ring support supports the at least one elastic ring in a first state. When the arms are extended, the elastic ring support supports the at least one elastic ring in a second state. The at least one elastic ring is stretched more in the second state than in the first state. The arms when extended are spaced from one another sufficiently to permit mounting of the ornamental members on the at least one elastic ring between the arms.

A rigidifiable flexible device includes a flexible member having flexibility, a plurality of movable members arranged in a line on a path between one end and the other end of the flexible member along a longitudinal direction of the flexible member, the movable members being movable on the path, a stopper provided at the one end of the flexible member and configured to prevent the movable members from being removed from the path beyond the one end of the flexible member, and a blocking member configured to prevent the movable members from being removed from the path beyond the other end of the flexible member. The length of a portion of the path between the blocking member and the stopper is adjustable so that the movable members are brought into close contact with each other on the path to form an integrated support body.

A Brunnian link is a link formed from a closed loop doubled over itself to capture another closed loop to form a chain. One or more beads may be assembled to a linked item formed with Brunnian links. The beads include tapered sides to provide a curved interface that corresponds with the shape of a completed linked item.

A flexible luxury strap is provided having a plurality of beads attached (or linked) to each other to form a substantially rectangular array of alternating first and second rows. The array has a length and a width. The first row has a number of substantially identical beads greater than the number of beads in the second row. The second row has a bead of an elongate shape whose length defines the width of the array. In some instances, the bead of an elongate shape may be formed by adhering a plurality of smaller beads together. Substantially all or all of the beads may be crystals.

A substantially annular-shaped accessory includes multiple arc-shaped structural elements that form a C-shaped annulus (major arc-shaped annulus) and a core. The core has a structure formed into a C-shaped annular-shaped accessory having an end gap of expandable/contractible width. One end of the core having a C-shaped member and an elastic body are fasten to a locking projection inside the arc-shaped structural element constituting one end section. Another end of the core is fasten to the locking projection inside the arc-shaped structural element constituting another end section.

A strap of the present disclosure includes a spring rod that includes a shaft member, and a strap main body that includes a plurality of decorative members coupled to each other and a connecting ring coupled to an end portion of the plurality of decorative members. The strap further includes a coupler that includes a spring rod insertion hole through which the spring rod is inserted, a fixing member insertion hole, and a connecting ring arrangement portion in which the connecting ring is disposed and that can be coupled to a watch main body of a watch by the spring rod, and a fixing member that connects the strap main body and the coupler by being inserted through the fixing member insertion hole and the connecting ring.

A substantially annular-shaped accessory includes multiple arc-shaped structural elements that form a C-shaped annulus (major arc-shaped annulus) and a core. The core has a structure formed into a C-shaped annular-shaped accessory having an end gap of expandable/contractible width. One end of the core having a C-shaped member and an elastic body are fasten to a locking projection inside the arc-shaped structural element constituting one end section. Another end of the core is fasten to the locking projection inside the arc-shaped structural element constituting another end section.

A multi-joint bending structure includes: a first-band-piece including joint potions on both ends; bending-units enabling the multi-joint-bending-structure to change in position between a straight state and a bent state; a third-band-piece including a joint potion provided on one end, the joint portion connected to the joint potion of the end of one of the bending-units; one pair of two linear bodies, each of the linear bodies having one end fixed to the housings and another end movable along the housings; and an assisting-force-generation-mechanism provided at predetermined opposed positions of the pair of two linear bodies and configured to generate assisting force, wherein the assisting-force-generation-mechanism includes rod-like bodies, a contracting-elastic-body inserted into the gap, and two piece members which both the ends of the overlapping potions energized by the piece members switch over, and the contracting force of the elastic-body acts as the assisting force between both the ends.

An article of jewelry or costume jewelry having at least one elastic or flexible support element and a plurality of ornamental elements fitted in succession on the elastic or flexible support element and coupled two by two along a development direction of the article of jewelry or costume jewelry is provided. Each ornamental element has a first coupling face for coupling to a subsequent contiguous ornamental element, the first coupling face having a raised formation, and an opposite second coupling face for coupling to a previous contiguous ornamental element, the second coupling face having a recess complementary in shape to the raised formation of the previous contiguous ornamental element. Two contiguous ornamental elements are coupled together by accommodating the raised formation of a first element of the two contiguous ornamental elements within the recess of a second element of the two contiguous ornamental elements, with at least one shock-absorbing spacer element arranged therebetween.

Provided herein is a building block string accessory including a building block and a string. A first side of the building block is provided with a pair of mirror-symmetrical stringing structures that are spaced apart, each stringing structure having a stringing through-hole. The string includes two threading sections and two connecting sections, which are alternately arranged and interconnected to form a closed-loop structure. The threading sections are aligned with the stringing structures and are threaded through stringing through-holes of the stringing structures. A connecting member is provided between the two connecting sections, and the connecting member is detachably connected to the two connecting sections.