JP2007252684A - Cutting structure of jewelry - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide novel cutting structure of jewelry, in which a virtual image of a cut shape made by reflection of a cut shape formed on a pavilion side is integrally come up with the cut shape on the pavilion side when it is viewed from a table direction. <P>SOLUTION: Top parts of five basic cut faces B1 to B5 are formed so as to converge toward the bottom of the pavilion 14. Adjoining basic cut faces share adjoining sides 21, 22 and so on. Small cutting is applied along the shared sides toward a culet 16 so that a star shape is made by an outline formed of a group of small cut faces A1 to A10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a novel jewelry cutting structure, and by cutting diamond or other jewelry into a specific shape, not only the cut shape formed on the pavilion side when viewed from the table direction, but also its The cut shape of the virtual image by reflection is made to stand out.

Traditionally, diamond cuts are based on a 58-sided cut called a round brilliant cut, with the polyhedral cut on the crown side to shine mainly on the crown side, and no decorative cut on the pavilion side. It was.

Therefore, as seen in, for example, Japanese Patent Application Laid-Open No. 2004-194778 (see Patent Document 1), Japanese Patent Application Laid-Open No. 2004-19479 (see Patent Document 2), etc., the star-shaped formed on the bottom square surface of the pavilion The outer diameter in the plan view of the pentagon and the diameter of the flat portion of the crown are substantially equal, the flat portion of the crown is a decagon, and the flat portion of the quadrangular surface where the tops facing the flat portions of the girdle and the crown are in contact with each other. It is known that the top of the side is in contact with the central part of each side of the decagon so that the star shape of the cut surface applied to the pavilion can be seen from the table direction.
JP 2004-194778 A JP 2004-194779 A

Certainly, in the diamond cutting structure described in Patent Documents 1 and 2, the present invention is such that the pavilion side, which has not been used in the past, is also cut and this is brought out as a pattern on the crown side to give a fresh taste. And in common.

However, in the diamond cut structures described in Patent Documents 1 and 2, the star shape of the cut surface applied to the pavilion is only visible from the table direction, which may be fresh, but surprisingly I hate lacking.

Therefore, the jewelry cutting structure according to the present invention is characterized in that the jewelry cutting satisfies the following requirements A to D.
A) The tops of the five basic cut surfaces are gathered toward the bottom of the pavilion, and the adjacent basic cut surfaces have the adjacent edges in common,
B) A small cut is made toward the curette side along the common edge, so that the contour formed by the combination of the small cut surfaces becomes a star shape,
C) By making the outline of the combined body of small cut surfaces forming a star shape reflected from the basic cut surface of the pavilion facing the tip of the star shape formed in one pavilion and visible from the table,
D) When the combined body of small cut surfaces forming a star shape is viewed from the table direction, it forms the original star shape with the tip of the combined body of small cut surfaces forming a virtual star shape reflected on the basic cut surface. The combined tip of the small cut surface did not overlap, and two stars were overlapped so that they could be seen from the table direction.

The jewelry cut structure according to the present invention is characterized in that the combined body of the small cut surfaces forming the star shape is accommodated in the outline of the entire table.

By utilizing the refractive index of jewelry, the present invention allows the combination of a small cut surface that forms a star shape to be reflected by the basic cut surface when viewed from the table direction. The front end of the combined body and the front end of the combined body having a small cut surface that originally forms a star shape do not overlap with each other so that the two star shapes overlap to be seen from the table direction.

Therefore, the combination of small cut surfaces that form a virtual image that cannot be imagined only by the combination of small cut surfaces that form the star shape of the pavilion part can also be seen from the table direction, A cut structure can be provided.

Next, an embodiment of the jewelry cut structure of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of a jewelry cutting structure according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a bottom view thereof, and FIG. 4 is a combination of small cut surfaces forming a virtual star shape. FIG. 5 is a side view showing the principle that a combined body of small cut surfaces forming a virtual star shape can be seen from the table direction.

1 to 3, in a jewelry 11 made of diamond or the like according to one embodiment of the present invention, a portion of a crown 13 surrounding a table 12 is surrounded by an octagonal outline in the same manner as in normal cutting. Has been cut.
Next, the pavilion 14 is equally divided into five V-shaped basic cut surfaces B1 to B5. In other words, adjacent basic cut surfaces B1 to B5 have common end edges 21, 22,..., And when the fan-shaped surface uses the girdle 15 as a reference surface, the angle formed with respect to the reference surface Are cut at an angle at which a combined body of small cut surfaces forming a star shape of a virtual image to be described later can be seen from the table 12.

Next, along the common edge of the five V-shaped basic cut surfaces B1 to B5 of the pavilion 14, ten triangular small cut surfaces A1 to A10 are applied toward the curette 16 side.
That is, a side that intersects with the adjacent small cut surface A2 of the small cut surface A1 cut from the common end side 21 of the basic cut surfaces B1 to B5 toward the adjacent end side 22 and cut. Triangular small cut surfaces A1 to A10 are obtained as end sides 23 smaller than the end sides 21-2 and 22-2 located on the extended lines of the end sides 21 and 22. Therefore, the end side 24 remaining between the end side 21-2 and the small end side 23 is also an end side smaller than the end side 21-2, and the small cut surfaces A1 to A10 formed by connecting the small end sides 24 are combined. The contour 31 becomes a star shape.
It is desirable that the contour 31 of the combined body of the small cut surfaces A1 to A10 having a star shape is of a size that can fit within the contour of the table 12.

In addition, the adjacent edge 21 of five V-shaped basic cut surfaces B1-B5 is cut toward the girdle 15 side, and becomes five sub-cut surfaces C1-C5 arranged at predetermined intervals. A circular girdle 15 is easily formed.

When the jewelry 11 made of diamond or the like is cut as described above, the jewelry cut structure of the present invention is formed. As a result of cutting into such a shape, when the pavilion 14 side is viewed from the direction of the table 12, not only the star-shaped contour 31 composed of the combination of the small cut surfaces A1 to A10 indicated by solid lines in FIG. Thus, the star-shaped contour 31 appears to be reflected by the basic cut surfaces B1 to B5, and the contour 31 of the combined body of the small cut surfaces A1 to A10 forming the star shape becomes a virtual image indicated by a dotted line. It will be visible from the direction.

As shown in FIGS. 4 and 5, the tip D1 of the contour 31 of the combined body of the small cut surfaces A1 to A10 forming the original star shape is opposed to the basic cut surface B3. And the tip D1 of the contour 31 of the combined body of the small cut surfaces A1 to A10 that form the shape and the tip D1 ′ of the contour 31 ′ of the combined body of the small cut surfaces A1 ′ to A10 ′ that form the virtual image star shape The two stars overlap and become visible from the table.

In the above embodiment, the five basic cut surfaces B1 to B5 are used and the star shape is pentagonal. However, the number of cuts of the basic cut surface is not limited to this pentagon, and may be an odd square. Of course, when the number of basic cut surfaces is N, the number of small cut surfaces is 2N, and the angle of the basic cut surfaces needs to be within a predetermined range.

Although the diamond cut structure according to the present invention has been described with reference to diamond as an example, the cut structure of the jewelry according to the present invention can also be applied to artificial diamonds and other transparent jewelry.

It is a top view which shows one Example of the cut structure of the jewelry of this invention. It is the side view. It is the bottom view. It is a top view which also represented the coupling body of the small cut surface which makes the star shape of a virtual image. It is a side view which shows the principle which the coupling body of the small cut surface which makes the star shape of a virtual image can be seen from a table direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Jewelry 12 Table 13 Crown 14 Pavilion 15 Girdle 16 Curettes 21, 22,... End side 21-2, 22-2 End side 23 Small end side 24 End side 31, 31 ′ Outlines A1 to A10, A1 ′ to A10 ′ small cut surfaces B1 to B5 basic cut surfaces C1 to C5 sub-cut surfaces D1 and D1 ′

Claims (2)

A jewelry cutting structure characterized in that the jewelry cutting satisfies the following requirements A to D.
A) The tops of the five basic cut surfaces are gathered toward the bottom of the pavilion, and the adjacent basic cut surfaces have the adjacent edges in common,
B) A small cut is made toward the curette side along the common edge, so that the contour formed by the combination of the small cut surfaces becomes a star shape,
C) By making the outline of the combined body of small cut surfaces forming a star shape reflected from the basic cut surface of the pavilion facing the tip of the star shape formed in one pavilion and visible from the table,
D) When the combined body of small cut surfaces forming a star shape is viewed from the table direction, it forms the original star shape with the tip of the combined body of small cut surfaces forming a virtual star shape reflected on the basic cut surface. The tip of the combined body of the small cut surface does not overlap, and two stars are overlapped so that they can be seen from the table. 2. The jewelry cutting structure according to claim 1, wherein the combination of the small cut surfaces forming a star shape is contained within the outline of the entire table.

Images