JPH0628802U - A plate-shaped lens with a three-dimensional mark - Google Patents

Abstract

(57) [Abstract] [Purpose] A mark (a T-shaped mark in this example) is marked by forming a mark-shaped groove 1a on the plate-shaped lens 1 and hot-stamping the hot-stamp sheet 3 into the mark-shaped groove. The above lens is improved to prevent the damage of the over-stamp that the hot stamp comes out from the mark-shaped groove 1a. [Structure] A rim 5 is drawn around the mark-shaped groove 1a on the surface opposite to the groove 1a. As a result, when viewed in the direction of arrow F, the overstamp 3a is hidden and does not appear in the appearance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lens having a three-dimensional mark on the surface of a transparent plate member.

[0002]

[Prior art]

 As a technique for displaying a mark made of characters, symbols, figures, or a combination thereof having a three-dimensional effect on the surface of the plate lens, a mark-shaped groove is formed on the surface of the plate lens, and the inner surface of the groove is formed. A technique of forming a metal thin film using a vacuum vapor deposition method is known. According to this technology, a mark having a metallic color tone and metallic luster is three-dimensionally displayed. However, this vacuum vapor deposition process is complicated in process and generally a. Concave surface undercoat (mask coating), b. Dry curing, c. Concave surface vacuum evaporation (mask evaporation treatment) d. Concave top coat (mask coating), e. Dry cure, f. Over deposition removal (alkali cleaning), g. Repeated washing with water, h. Washing with pure water, i. Draining and drying, j. Coloring treatment other than the concave portion, k. Since it has to go through a process such as dry curing, the yield is poor and the manufacturing cost is high. In addition to the above-mentioned vacuum deposition, insert molding technology is also known, but the foil film is expensive and there are many restrictions on the shape of the molded product. There is a hot stamp method as a technology that can display a three-dimensional mark relatively easily. FIG. 2 is an explanatory view of the process. As shown in FIG. 2A, a mark-shaped groove 1a is previously provided on one surface of the transparent plate-shaped lens 1. The cross-sectional shape of the groove 1a is shallow V-shaped. The hot stamp sheet 3 is pressed in the direction of the arrow P toward the mark-shaped groove 1a by the marking jig provided with the chevron portion 2a corresponding to the V-shape, and is pinched as shown in FIG. Transfer the shape. In this case, as shown in FIG. 2B, if the angle ψ of the concave surface of the groove 1a and the angle ψ of the convex convex surface of the marking jig 2 do not exactly match, the hot stamp sheet 3 may be broken. Cause The method shown in FIG. 3 is effective for preventing such a problem. The marking jig 4 shown in FIG. 7A is made of an elastically deformable material, and the angle φ of the peak portion 4a is slightly smaller than the angle θ of the valley of the mark-shaped groove 1a. Has been. When hot stamping is performed using such an engraving jig 4, the center portion abuts at the beginning as shown in FIG. 3 (B), and the hot stamp sheet 3 and the plate-shaped lens 1 exist. As shown in (C) of FIG. 6C, the air from the engraved jig 4 is elastically deformed to have the same apex angle as the angle θ of the groove 1a, and the mutual crossing is performed via the hot stamp sheet 3. Stick to. This method is an unknown invention (Japanese Patent Application No. 3-164307) created by the present inventor and filed separately by the present applicant.

[0003]

[Problems to be solved by the device]

 The present inventor continued the practical application test after the application of the invention according to the above-mentioned prior application, and confirmed a sufficient practical effect. However, it was confirmed that there was room for improvement as described below. FIG. 4 is an explanatory diagram thereof. As shown in (A), the plate-shaped lens 1 has a mark-shaped groove (a T-shaped groove in this example). The BB cross section is shown in FIG. The mark-shaped groove 1a has a shallow V shape. The shaped lens 1 may be a flat lens as shown in FIG. 7B or may be a prism lens as shown in FIG. In either case, when the hot stamp sheet 3 is placed on the shallow V-shaped groove 1a and hot stamping is performed by the procedure described with reference to FIG. 3, FIG. , (C) indicated by phantom lines, an overstamp portion 3a protruding from the shallow V-shaped groove 1a is generated. If such an overstamp is formed, the contour of the mark shape becomes irregular like the overstamp 3a shown by the phantom line in FIG. 4 (A), and the commercial value is significantly reduced. The present invention has been made in view of the above circumstances, and can prevent appearance defects due to overstamping. It is intended to provide a lens with a mark.

[0004]

[Means for Solving the Problems]

 The basic principle of the present invention created to achieve the above-mentioned object will be briefly described as follows with reference to FIG. 1 corresponding to the embodiment. That is, an edge 5 is drawn along the contour of the mark-shaped groove 1a on the surface opposite to the surface provided with the mark-shaped groove 1a (the lower surface in FIG. 1B). The "drawing of the frame" does not mean that it is drawn by hand, and a known technique such as a printing method or a stamping method can be arbitrarily selected and used.

[0005]

[Action]

 According to the above means, even if the overstamp 3a is generated, when viewed from the direction of the arrow F, it is hidden by the rim 5 and does not appear in the appearance, and a mark-shaped circle having a three-dimensional effect is formed by the rim 5. It stands out.

[0006]

【Example】

 1A and 1B show an embodiment of a lens showing a mark according to the present invention. FIG. 1A is a plan view and FIG. 1B is a sectional view taken along line BB. The present embodiment is an improvement of the conventional example shown in FIG. 4 by applying the present invention, and those having the same reference numerals as those in FIG. 4 are the same as or similar to those in the conventional example. Is a constituent part of. Next, the difference between FIG. 1 and FIG. 4 will be explained, that is, the point improved by applying the present invention. The mark-shaped groove 1a is provided on the depth side of the sheet of the plate-shaped lens 1 in the figure (A), and is provided on the upper surface in the figure (B). The surface on the side where the groove is provided is the surface that is the back side in use. On the side opposite to this back surface, that is, the surface on the front side, the contour 5 of the above-mentioned mark is drawn with an edge 5 (indicated by spots in FIG. 1A). In the present embodiment, the rim 5 is printed using a printing ink suitable for the material of the plate lens 1. When carrying out the present invention, the frame 5 may be formed by a stamp (rubber stamp) method, a mask coating method may be used, or an annealing method may be applied. Even if the overstamp 3a is generated as shown in FIG. 1B, when this is seen from the front side as shown by the arrow F 1, the overstamp 3a is hidden by the frame 5 and does not appear in the appearance. The V-shaped mark-shaped groove 1a having a shallow cross-section is hot-stamped on the hot-stamped sheet 3 to give a three-dimensional appearance, and the outline of the V-shaped groove 1a is conspicuous due to the edge 5.

The embodiment shown in FIG. 1 is an example in which the present invention is applied to a flat plate lens 1. Although not shown in the figure, even when the mark-shaped groove 1a is provided in the prism lens as shown in FIG. 4C and the hot stamping process is performed, an edge for concealing the over stamp is obtained according to the embodiment of FIG. By providing it, the same action and effect can be obtained. The mark-shaped groove 1a in the embodiment of FIG. 1 has a shallow V-shaped cross section, but the function and effect of the present invention are to hide the overstamp along the contour of the mark-shaped groove 1a. Since it is due to the provision of the rim of the above, even if the bottom of the mark-shaped groove 1a has a rounded shape (that is, a U-shape with a shallow cross section), the same operation as in the above-mentioned embodiment is obtained. ， The effect prevents over-stamping.

[0008]

[Effect of device]

 As described above, a mark-shaped groove having a V-shaped or U-shaped cross section is provided on the surface of a transparent plate-like lens, and a hot stamp sheet is pressed against the inner surface of the groove so that the mark is displayed on the lens. By applying the present invention, the mark-shaped groove having a V-shaped or U-shaped cross-section is provided on the outer periphery of the groove on the plate-shaped lens along the contour of the mark-shaped groove. By adding a simple and inexpensive structure of drawing a rim on the surface, it is possible to prevent the appearance of the overstamp from being damaged and the commercial value from being reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a plan view, and (B) is a BB sectional view thereof.

FIG. 2 is a process explanatory diagram of an operation of providing a mark-shaped groove on a plate lens and performing hot stamping.

FIG. 3 is a view in which an angle is entered in a sectional view for explaining a hot stamping method according to an unknown invention.

FIG. 4 is a cross-sectional view for explaining over-stamping as a problem in hot stamping processing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate-shaped lens, 1a ... Mark-shaped groove, 2 ... Marking jig, 3 ... Hot stamp sheet, 4 ... Elastic marking jig, 5 ... Mark-shaped edge.

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped lens in which a mark-shaped groove having a V-shaped or U-shaped cross section is provided on one surface of a plate-shaped lens and a mark is marked by pressing a hot stamp sheet on the inner surface of the groove. A plate-shaped mark which is three-dimensionally marked, characterized in that a mark having a shape edging the contour of the mark shape is drawn on the surface opposite to the surface on which the mark shape groove is provided. Lens.