JPH0645513U - Accessories for jewelry - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a chain-like or string-like accessory stopper that is easy to put on and take off, has a low manufacturing cost, and is excellent in design. A chain-like or string-like fastener for an accessory, which is composed of a pair of combination elements, which are pressed to face each other to form an engaged state, and which is pulled in a separating direction to release the engaged state. Each combination element comprises a pair of lumps having smooth curved surfaces, an elastic support member having both ends fixed to the lumps and straddling each lump, and applying a force to bring the lumps closer to each other. It is characterized by having an engaging portion for holding one end of a chain-like or string-like accessory provided on a part of the body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The invention of the present application relates to an end portion of a chain-shaped or string-shaped accessory and a stopper for fixing the end portion.

[Prior art]

[0002] For example, as a stopper for an accessory such as a necklace made of 18-karat gold, the best known and used one in the past is a pulling ring as shown in Fig. 1, or a clasp. It was called (not shown).

Since these conventional stoppers are constructed by combining several parts, the structure is not simple, requires a considerable amount of time and cost to manufacture, and is not always easy to attach / detach to / from the accessory body. . It cannot be said that conventional fasteners are inferior in design and inferior in design as a component part of a decorative article.

[0004]

[Problems to be solved by the device]

 The present invention solves all the problems of these conventional chain-shaped or cord-shaped accessory stoppers, and has a simple structure, does not require the cost and time for manufacturing, and the accessory body. The purpose of the present invention is to provide a fastener for an accessory that is easy to attach to and detach from, and has a high fixing function, and has an excellent design.

[Means for Solving the Problems]

Therefore, as a result of repeated experiments and trial manufactures, the present inventors have succeeded in developing a fastener for an accessory that meets the above purpose. That is, the gist of the present invention is as follows. A chain-like or string-like fastener for an accessory, which comprises a pair of combination elements, presses them against each other to form an engaged state, and pulls them in a separating direction to release the engaged state. The combination element is composed of a pair of lumps having smooth curved surfaces, an elastic support having both ends fixed to the lumps and straddling the lumps, and applying a force to bring the lumps closer to each other. It is characterized in that it has an engaging portion for holding one end of a chain-like or string-like accessory provided in the section.

The basic structure of the accessory stopper of the present invention is as described above, and more specifically, it has a structure as shown in FIG. That is, one of the pair of stopper elements is a support 1 obtained by bending a wire piece or metal strip cut into a predetermined length into a U shape, and a lump 2 having curved surfaces at both ends thereof, for example, a sphere. It is fixed. An engaging portion (round ring) 3 for engaging one end of the accessory body 4 is provided at an arbitrary position on the support.

Most of chain-like or string-like accessories such as necklaces use 18-karat gold.

[Action]

 With such a configuration, the support 1 is not work hardened when it is processed from an 18-karat gold wire or a metal plate into a thin wire or a thin plate having a predetermined diameter, or when it is bent into a U-shape, for example. Raising it causes elasticity depending on the degree of work hardening, and a spring force is generated in the direction connecting the U-shaped tips in a plane on the paper.

The composition of 18 gold, which is the material of the accessory, is gold: 18/24, silver: 3/24, and copper: 3/24 in weight ratio, but the volume percentage reaches 20% of copper, and work hardening occurs. Is sufficiently possible, and a predetermined spring property can be imparted by combining the working rate and the annealing conditions.

In this way, for example, when the same 18-karat gold spheres 2 are attached to opposite ends of the support 1 which is bent to have a U-shape and has elasticity, the pair of spheres 2 come close to each other. It comes into contact while receiving elastic force. In this way, the other stop element is made in the same way and completes as a set of stops.

In order to engage the pair of combined elements in the state of FIG. 2 (a), the surfaces of the respective elements including the support 1 are made to face each other at right angles, and then the elements are pressed in the directions of the arrows. , The other pair of contact spheres are in a state of interrupting the pair of spheres 2 that are in contact with each other, and a force for expanding the U-shaped support 1 is exerted to complete the engagement of the pair of elements. At the same time, the U-shaped support 1 returns to its original position due to the spring force, and the spherical members 2 of each pair come into contact with each other again to be in the fixed and engaged state as shown in FIG. 2B. As the combination elements to be engaged, it is usual to select the same shape elements, but it is also possible to combine elements having different shapes.

To release the engagement, both supports may be held and pulled in opposite directions. The tensile strength in the engaged state can be changed in any way depending on the degree of work hardening of the support and the annealing conditions as described above. Immediately when the tensile force (the detaching force of the body of the accessory) is applied. It can be in any engaged state from a disengaged state to a great tensile strength until the chain of the main body is deformed.

[0012] Further, the tensile strength of the sphere depends on how the line connecting the centers of the engaging spheres makes an angle with the direction of the support (metal line) penetrating the center of the sphere. Sa is affected. Generally, the greater this angle, the greater the tensile strength. For example, it has been determined that the combination of stop elements with an annular support of Figure 4 (a) has a higher tensile strength than the combination of stop elements with a V-shaped support of Figure 4 (b). The result has been confirmed.

[0013] In the conventional pulling ring, when the body of the accessory is subjected to an unexpected pulling force, before the chain is deformed, for example, the circular ring attached to the pulling ring is made fragile so as to be damaged. However, in the case of the stopper of the present invention, in such a case, the stopper itself functions as a safety device and can be removed without damaging any part.

[0014]

【Example】

 A 18-mm gold wire having a diameter of 0.9 mm was cut into a length of 14 mm to prepare a support piece, which was bent in a tear shape so that both ends were in contact with each other. Next, the ends of the support were sequentially inserted into a sphere having a diameter of 3 mm and a through hole having a diameter of 3 mm, and the sphere and the wire were fixed to complete one stopper element. Similarly, several devices of the same shape were created, and two devices were made into a set, and each device was attached and detached to confirm the ease of operation. For the fasteners with weak engaging force, we examined each element, changed the mating side and checked the engaged and disengaged state again, and removed the support and sphere for the weak spring force and remade them.

On the contrary, if the spring force is too strong and it is difficult to attach / detach, the support is appropriately annealed by flame to adjust the spring force.

After mounting a personal accessory (18 metal chains with a diameter of 2.5 mm) on each of the completed fasteners, a tensile force was applied to the fasteners and the magnitude of the engaging force was measured. The average pulling force of 30 pieces was about 3 kg.

On the other hand, when a tensile force was applied to a chain of 18-karat gold of the same size to which a conventional pulling ring was attached, the breaking strength of the engaging portion of the pulling ring was about 5 kg.

As described above, according to the present invention, the contradictory functions of the ease of attachment / detachment and the strength of the engaging force can be satisfied in a well-balanced manner. On the other hand, with the conventional pulling wheel, the attachment and detachment is complicated, and the engaging force was about 1.7 times that of the stopper of the present invention, but such a high value is unnecessary in the first place, and the engaging When the lock was released, the pulling ring was likely to break, and the accessory became inconvenient at that time.

In addition, as a result of making a lump other than a sphere as a lump having a curved surface, as shown in (a), (b), (c), (d), (e) and (f) of FIG. In addition, rugby ball-shaped, drum-shaped (conical), conical, abacus bead-shaped, hemispherical, and ultrafine wire wrapped around the rugby-ball contour can be preferably used. I understood.

Further, the support is not limited to the U-shape illustrated above, but as shown in FIGS. 4 (a), (b), (c), (d), (e) and (f), There are various shapes such as an annular shape, a V-shape, a U-shape with one or more turns of coil on the bottom, a U-shape, and other various modifications other than those shown in the drawings. The base portion (central portion) of the support can be formed into a decorative block having an arbitrary shape. Also, the cross section of the support may be a circle, a ring, a rectangle, a hexagon, a flat plate, etc. as shown in (a), (b), (c), (d), (e) and (f) of FIG. Can be used.

Further, the surface of one or both of the lump and the support can be patterned by etching or engraving. This makes it possible to further improve the decorative or design effect of the stopper itself.

[0022]

[Effect of device]

 As described above, the fastener for an accessory of the present invention requires less manufacturing time and cost, is easily attached and detached, and is excellent in design. Furthermore, due to its own decorative effect, it can be used not only as a single stop, but also as a chain jewelry at any place. In that case, the agglomerate can be not only 18 gold, but also jewelry such as jewelry, glass beads, and synthetic resin beads.

[Brief description of drawings]

FIG. 1 is a sketch drawing showing the structure of a conventional pulling wheel.

FIG. 2 is a schematic view of an embodiment of a stopper according to the present invention.

FIG. 3 is a schematic view showing another embodiment of the stopper of the present invention in which the shape of the support is different.

FIG. 4 is a schematic view showing another embodiment of the stopper of the present invention in which the shape of the lump is different.

FIG. 5 is a cross-sectional view of a support body of a block in the stopper of the present invention.

[Explanation of symbols]

 1 Support 2 Mass 3 Circular Ring 4 Body of Accessory

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Motokawa Ishikawa 3-1-2 Minamiyukitani, Ota-ku, Tokyo (72) Katsuji Muraki Katsuji Muraki 4-1, Kajigaya, Takatsu-ku, Kawasaki, Kanagawa 301 Cross-point Kajigaya 301

Claims (1)

[Scope of utility model registration request] 1. A chain-like or string-like fastener for an accessory, which comprises a pair of combination elements, presses them facing each other to form an engaged state, and pulls them in a separating direction to release the engaged state. In each combination element, a pair of lumps having a smooth curved surface, and elastic supports having both ends fixed to the lumps and straddling the lumps to give the lumps a force of approaching each other. And a fastener for an accessory, which has an engaging portion for holding one end of a chain-like or string-like accessory provided on a part of the support.