JPH0143695Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lens mold for molding eyeglass rings.

It is preferable that the eyeglass ring has an α-shape in which the upper ring and the lower ring intersect, as shown by the reference numeral 11 in FIG. However, such a shaped eyeglass ring needs to be manufactured by shifting the phase of the upper ring and lower ring so that they overlap at the intersection, but it is easy to manufacture such a eyeglass ring. There was no known lens shape that could be easily made and that was also easy to manufacture.

The present invention focuses on this point, and as described above, the eyeglass ring in which the upper ring and the lower ring exhibit an α-shape can be easily manufactured, and the lens shape itself is easy to manufacture. The purpose is to provide a lens shape.

That is, the present invention provides an upper ring lens shape in which a circumferential surface with a relatively small bend and a circumferential surface with a larger bend than this are arranged at substantially opposing positions, and , and when both lens shapes are superimposed so that the same circumferences of both lens shapes coincide, the circumference of the lower ring lens is This lens shape for forming eyeglass rings is characterized by having a circumference of the upper ring lens shape having a small bend and being formed so as to perpendicularly intersect the plane of the lens shape.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lens mold for forming eyeglass rings according to the present invention will be described below based on the drawings. In Figures 1 and 2, 5 is the shaft hole, 6 is the connecting bolt hole, and 7 is the shaft hole.
is a connecting bolt, A is a rotating shaft inserted into the shaft hole 5,
B is a spiral groove for shifting the coax. The upper ring and the lower ring are connected to the connecting bolt 7 and the rotation axis A.
is set at a predetermined relative position by.

In Fig. 2, A is one mold 1-2 for molding the upper ring.
In Fig. 2, B shows molds 3 and 4 for molding the lower ring.
FIG. 2C shows the molds 1' to 2' for molding the other upper ring. In this embodiment, a combination of three types is used as shown in FIG. 1, but of course a combination of two types, A and B or B and C in FIG. 2, may also be used.

In addition, the right side of the lens shape shown in FIG. 2A has a circumference with a small bend, and the lower left side, which is almost opposite to this, has a circumference with a larger bend. Note that FIG. 2C is the same type as FIG. 2B.

In addition, as can be seen by aligning the shaft holes 5 and bolt holes 6 and overlapping them, Figure 2 A and Figure 2 B show that Figure 2 B is the circumference with the large bend on the left side of Figure 2 A. When the upper ring lens shape and the lower ring lens shape are overlapped so that the same parts coincide as shown in FIG. 1, the peripheral edge of the lower ring lens shape is A part of the lens is arranged to perpendicularly intersect with the curved circumference of the lens for the upper ring and the plane of the lens.

A spectacle ring material 9 with grooves 8 as shown in FIG. 3 is cut in advance to a predetermined length. A, B in Figure 2,
The third type (C) is connected together with a connecting bolt 7 in advance, and is attached to a rotating shaft A (not shown) for eyeglass ring molding through a shaft hole 5 so as to be able to rotate as one body.

The molds 1 and 2 for molding the upper ring on one side and the molds 1' and 2' for molding the other upper ring have protrusions 10 and 1.
0' is provided. For example, when molding the left eyeglass ring frame shown in FIG. It is shifted toward molds 3 and 4 for forming the lower ring in FIG. Therefore, the material 9 smoothly shifts from position 2 to position 3 at the matching portion of the circumference of both lens shapes, and
The winding ends at the position. The spectacle ring frame thus formed is molded as the spectacle ring frame 11 before expansion as shown by the dotted line in FIG. Eyeglass ring frame 1 after expansion as shown by the solid line in Fig. 4
It expands as shown in 2.

However, the 6th section of the cross-sectional view taken in Figure 5-'
Twisting in the front and back direction as shown in Figure A has occurred.
That is, position 1 at the beginning of winding and position 4 at the end of winding.
are not on the same vertical straight line but are slightly twisted.

Therefore, when molding the right eyeglass ring frame shown in Figure 5B, the molds 1' to 1' for molding the other upper ring are
Pressure-wrap the material 9 from the position of the protrusion 10' of 2',
When winding from position 1 to position 2', the spiral groove B is reversely shifted toward the lower ring molding molds 3 and 4 shown in FIG. 2B. Therefore, in this case, the material 9 is shifted from the position 2' to the position of the lower ring lens shape and ends at the position 4.

The spectacle ring frame after expansion formed in this way is as shown in Fig. 5-B, and as shown in Fig. 5-
The torsion in the front-rear direction as shown in FIG.
The winding end position 4 is not on the same vertical line, and the frame is twisted in the opposite direction to the previous frame.

As shown in Fig. 5 A and B, left and right binocular rings with opposite twists are used in combination.

According to the present invention, it is possible to easily make an α-shaped eyeglass ring in which the upper ring and the lower ring intersect.
Furthermore, if the α-shaped lens shape is made of one piece, the lens shape will be complicated and difficult to work with, but according to the present invention, the lens shape can be made as simple as shown in Figure 2 A, B, and C. This makes it easy to work with.

[Brief explanation of drawings]

Figure 1 is a perspective view showing one eyeglass ring being molded using an embodiment of the lens mold for eyeglass ring molding of the present invention, and Figure 2A is a cross-section of Figure 1 along the -' line. End view, Figure 2 (b) is an end view taken along the -' line in Figure 1, and Figure 2 (C) is an end view taken along the -' line in Figure 1.
3 shows an embodiment of the eyeglass ring material used in the lens shape of the present invention, A is a front view, B is a sectional view of the same point A taken along the -' line,
Figure 4 is a front view showing the state of the molded spectacle ring frame of the present invention before and after expansion, Figure 5 A is a front view of the left shaped spectacle ring frame of the present invention, and Figure 5 B is the present invention. A front view of the molded eyeglass ring frame for the right side, Figure 6A is a cross-sectional view of Figure 5A taken along the -' line, Figure 6B is a cross-section of Figure 5B taken along the -' line. It is a diagram. In the figure: 1 to 2... one mold for molding the upper ring,
1'~2...Mold for molding the other upper ring, 3~4
... Mold for molding the lower ring, 1, 2, 3, 4 ... One eyeglass ring, 1', 2', 3, 4 ... The other eyeglass ring, A ... Rotating shaft, B ... Shaft.

Claims (1)

[Scope of utility model registration request] A lens shape for an upper ring in which a circumference with a relatively small bend and a circumferential surface with a larger bend than this are arranged in almost opposing positions, and a circumference that is the same as the circumference of the lens shape for the upper ring. When both lens shapes are overlapped so that the same circumferences of both lens shapes coincide, the circumference of the lower ring lens shape is the same as the upper ring ball shape. A lens mold for forming eyeglass rings, characterized by a circumference of the mold having a small bend, and a lens mold that is perpendicular to the plane of the lens mold.