Unlock instant, AI-driven research and patent intelligence for your innovation.

Triangular pyramid type cube corner retro-reflection article having curved reflection side surface

A retro-reflection, solid angle technology, applied in optical elements, optics, instruments, etc., can solve the problems of difficult tool making mold processing, poor incident angle characteristics, etc., and achieve the improvement of observation angle characteristics, simple methods, and observation angle characteristics. Effect

Inactive Publication Date: 2007-01-03
NIPPON CARBIDE KOGYO KK
View PDF17 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] As mentioned above, conventionally known triangular pyramid-shaped three-dimensional structures such as Jungersen's US Patent No. 2,481,757, Stamm's US Patent No. 3,712,706, Hoopman's European Patent No. 137,736B1, Szczech's US Patent No. The corner retro-reflective element is shown in Figure 6, at the point that the bottom surfaces of a plurality of triangular pyramid-shaped reflective elements as the incident and reflection cores of light are on the same plane, and a pair of opposite elements have similar shapes and the height of the element Equal this point is all common, the incident angle characteristics of the retro-reflective sheet and the retro-reflective article that are made of the triangular pyramid reflective element that bottom surface is in the same plane like this are all relatively poor, that is, if light is relative to this triangular pyramid When the incident angle of the reflective element increases, the retro-reflective brightness decreases rapidly
[0030] In addition, similarly, in the above-mentioned conventionally known U.S. Patent No. 4,775,219 of Appeldorn, U.S. Patent No. 5,171,624 of Walter, and U.S. Patent No. 5,565,151 of Nilsen, improvement of observation angle characteristics by various methods is proposed, However, each invention has the disadvantage of difficult tool making or mold processing.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Triangular pyramid type cube corner retro-reflection article having curved reflection side surface
  • Triangular pyramid type cube corner retro-reflection article having curved reflection side surface
  • Triangular pyramid type cube corner retro-reflection article having curved reflection side surface

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0091] The method of forming the retroreflective article of the present invention is described in more detail below with reference to the accompanying drawings.

[0092] exist Figure 9 The middle shows a method of forming a V-shaped groove for forming a plurality of pairs of triangular pyramid-shaped cube corner retroreflective elements by a conventionally known method. exist Figure 9 In (a), the figure which formed the left-right symmetric V-shaped groove|channel is shown. The one-sided groove angle (GL, GR in FIG. 7( a )) shown in the cross section of the formed V-shaped groove is a constant angle in one V-shaped groove.

[0093] exist Figure 9 (b) shows a diagram in which left-right asymmetrical V-shaped grooves are formed. The one-sided groove angle (GL, GR in FIG. 7( b )) shown in the cross section of the formed V-shaped groove is also a constant angle in one V-shaped groove.

[0094] exist Figure 9 (c) shows a diagram of forming a groove having a curved cross-s...

no. 2 Embodiment approach

[0160] Hereinafter, a method for forming the retroreflective article according to the second embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0161] Figure 17 A method for forming a V-shaped groove is shown in the second embodiment of the present invention, which is used when forming a retroreflective article composed of a plurality of pairs of triangular pyramid-shaped cube-corner retroreflective elements having the following characteristics: : The bases of the V-shaped grooves in any direction are non-linear bases that do not form a linear trajectory, and the reflective side surfaces formed by the V-shaped grooves form curved surfaces and / or composite planes.

[0162] exist Figure 17 In (a), the following V-shaped grooves are shown. In the left-right symmetrical state (GL=GR) as shown in FIG. Since the trajectories are straight, even if the one-sided groove angle (GLx, GRx, GLy, GRy, GLz, or GRz) is a constant...

Embodiment 1

[0204] A mold in the shape of a retroreflective article of the present invention having a reflective side surface in which a conventionally known triangular pyramid-shaped cube corner element having a shape shown as Example 1 of Table 1, a 3 The one-side groove angle on both sides of the V-shaped groove in each direction is at most 0.01° smaller than the standard one-side groove angle. Figure 12 continuous change as shown. at this time, Figure 12 The rotation angle (η) of the cutting tool at the point A and the point O is 0, the rotation angle (η) of the cutting tool at the midpoint of the point A and the point O is 1.55°, and the rotation angle in between changes continuously. The shape of the fabricated element was 100 μm in height (h), and the inclination angle of the virtual optical axis was 0°. After the mold of such a shape was formed into a mold base material made of nickel by the rapid cutting method, a concave molding mold was formed by electroforming, and a polyc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a retroreflective article formed by a plurality of pairs of triangular pyramid cube corner retroreflective elements. A line segment formed by intersecting a plane perpendicular to the common plane, a vertical plane of the V-groove including the bottom of the V-shaped groove perpendicular to the common plane, and a reflective side surface including the bottom of the V-shaped groove, and a vertical plane of the V-groove The resulting one-sided groove angle forms an inconstant angle in the reflective side, and the reflective side forms a curved surface and / or a compound plane. The bases of the V-shaped grooves constituting the pair of retro-reflective elements in any direction are non-linear bases that do not follow a straight track, and the reflective side surfaces formed by the V-shaped grooves form curved surfaces and / or composite planes.

Description

technical field [0001] The present invention relates to retro-reflective articles such as triangular pyramid-shaped solid-corner retro-reflective sheets with novel structure. In more detail, the present invention relates to novel triangular pyramid cube corner retroreflective elements (hereinafter also referred to as triangular pyramid type reflective elements or simply referred to as reflective elements) in which cube corners are arranged in a most densely packed shape sharing their bases. Retro-reflective items such as retro-reflective items. [0002] In detail, the present invention relates to the following retroreflective articles such as cube-corner retroreflective sheets composed of triangular pyramid-shaped cube-corner retroreflective elements, which are used in road signs (general traffic signs or sight guide signs), road signs (road signs), engineering signs and other signs, number plates of vehicles such as automobiles or motorcycles, reflective tapes affixed to the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/122
Inventor 三村育夫
Owner NIPPON CARBIDE KOGYO KK