KR200421310Y1 - Rtro-Reflecting Unit and Retro-Reflector therewith - Google Patents

Abstract

The present invention relates to a retroreflective unit having a retroreflective unit capable of retroreflecting incident light in a direction in which the light is projected, and a retroreflective unit including the retroreflective unit. ; And a step portion composed of a pair of oil reflection surfaces contacting each other at substantially right angles, and a corner having a plurality of magnetic reflection corners at edges of the shared reflection surface and at substantially right angles with the shared reflection surface. The shared reflecting surface and the step portion are characterized in that it is made in contact with the plane angle of the right angle to form a nevus reflection corner. The retroreflective body has a high retroreflectivity, and thus has a high luminance overall, and a decrease in the retroreflective rate when the incident angle of light is large increases the range of a reflecting clock capable of retroreflective reflection.

Recursive, Reflector, Retroreflective, Right Angle, Reflective, Prism

Description

Retroreflective unit having a retroreflective unit and the retroreflective unit {Rtro-Reflecting Unit and Retro-Reflector therewith}

1 is a perspective view of a retroreflective body according to Example 1 of the present invention,

2 is a plan cross-sectional view of FIG.

3 is a cross-sectional view taken along line X-X of FIG. 2.

Figure 4 is an enlarged perspective view showing the retroreflective path of the retroreflective body according to Example 1 of the present invention,

5A and 5B are enlarged views comparing effective retroreflective areas of a retroreflective body and a conventional cube corner retroreflective body according to Example 1 of the present invention.

6 is a perspective view of a retroreflective body according to Example 2 of the present invention,

7 is a plan cross-sectional view thereof,

FIG. 8 is a cross-sectional view taken along the line X-X of FIG. 7.

9 is a perspective view of a total reflection prism,

10 is a side cross-sectional view of the total reflection prism.

11 is a front view of a retroreflective body according to Example 3 of the present invention,

12 is a cross-sectional view taken along line X-X of FIG. 11,

13 is a cross-sectional view taken along the line Y-Y of FIG.

14 is a cross-sectional view taken along the line y-y in FIG. 11.

15 is a front view of a retroreflective body according to Example 4 of the present invention,

FIG. 16 is a cross-sectional view taken along line X-X in FIG. 15.

17 is a front view of a retroreflective body according to Example 5 of the present invention,

18 is a cross-sectional view taken along the line X-X of FIG.

19 is a front perspective view of a retroreflective body according to Example 6 of the present invention,

20 is a cross-sectional view taken along line X-X of FIG. 19,

21 is a cross-sectional view taken along the line Y-Y of FIG.

22 is a front view of a retroreflective body according to Example 7 of the present invention,

FIG. 23 is a cross-sectional view taken along the line X-X of FIG.

24 is a front perspective view of a retroreflective body according to Example 8 of the present invention,

25 is a side cross-sectional view of FIG. 24,

FIG. 26 is a plan view of FIG. 24.

27 is a front view of a retroreflective body according to Example 9 of the present invention,

FIG. 28 is a cross-sectional view taken along the line Y-Y of FIG. 27;

FIG. 29 is a cross-sectional view taken along line X-X of FIG. 27.

<Description of Symbols for Main Parts of Drawings>

1: retroreflective body 10: retroreflective unit

11: Neon reflection corner 12: Neon reflection corner

111: shared reflection surface 112: step portion

112a: step surface 121,122: whole reflection surface

D: Main reflector D _i : Internal main reflector

D _m : Corner scent of reflex reflection corner D _s : Corner scent of reflection reflective corner

α: deflection angle of main reflections α _i : deflection angle of internal reflections

The present invention relates to a retroreflective unit capable of retroreflecting incident light in a direction in which the light is projected, and a retroreflective body having the retroreflective unit thereof.

For traffic safety facilities such as traffic signs, beacons, delegators, tripods, and other items that require visibility at night, such as safety suits, cars, bicycles, hats, and shoes, the light from the front is directed toward the light source that projects the light. By retroreflective, a retroreflective body is installed or attached to increase the visibility of these articles.

Conventionally, retroreflectors having glass beads or cube corners have been mainly used as retroreflectors applied to such articles. However, these conventional retroreflectors have a problem that the luminance is low or the endurance life is low because the retroreflectivity is generally expressed as the ratio of the retroreflected light to the incident light.

For example, the conventional retroreflectors using glass beads have a problem in that the light entering the edge of the glass beads or the light incident into the pores between the glass beads does not reflect recursively, resulting in low luminance and low luminance. .

In the conventional retroreflector using a cube corner, the retroreflectivity is generally higher than that of glass beads for light having a small incident angle. However, when the incident angle of light increases due to the movement of the light source, the apparent area of the exposed surface (the exposed surface viewed from the light source side). The area of) is inevitably reduced geometrically. At this time, since the ratio of the retroreflective area that can be retroreflected on the exposure surface is reduced to a much larger width, there is a problem in that the luminance sharply decreases in proportion to the size of the incident angle. Therefore, the range of the angle of retroreflective reflection, i.e. the retroreflective clock, is very narrow, and the retroreflective reflection of light having a large angle of incidence in which the direction of the retroreflective clock is deflected more than a predetermined angle from the front of the exposure surface in a specific direction. It was very difficult to design and produce a retroreflective body.

In order to solve the problems of the conventional retroreflectors, the present invention not only has a high retroreflectivity, but also provides a high retroreflective object with low luminance even at a low angle even when the incident angle of light increases. For the purpose of

In addition, it is also an object of the present invention to provide a retroreflective body that can easily change the direction of the retroreflective clock in the design stage and can be freely changed design of the direction of the retroreflective clock from the front of the exposure surface.

The retroreflective unit according to the present invention includes a shared reflective surface that is an optical single plane; And a step portion composed of a pair of oil reflection surfaces contacting each other at substantially right angles, and a corner having a plurality of magnetic reflection corners at edges of the shared reflection surface and at substantially right angles with the shared reflection surface. The shared reflecting surface and the step portion are characterized in that it is made in contact with the plane angle of the right angle to form a nevus reflection corner.

And, the retroreflective body according to the present invention is characterized in that it comprises at least one or more of the retroreflective unit as a retroreflective means.

In the above configuration, each of the reflective corners or retroreflective units are preferably formed in a regular pattern on the same plane in a densely arranged aspect ratio, each reflective corner is an aspect ratio defined by the aspect ratio, that is, the width in the lateral width to the corner edge length (W) / L) is preferably formed to be 1 or less.

In addition, the retroreflective body may be made of a multilayer structure in which a resin layer, a reflective layer capable of reflecting light, a protective layer for protecting the reflective layer, and the like are bonded after the retroreflective units are manufactured in a thin plate shape.

The retroreflectors of such a structure have a high ratio of retroreflected light to incident light, i.e. a high retroreflective rate, and a low drop in luminance even when the angle of incidence increases, compared to conventional retroreflectors such as cube corners and glass beads. The brightness is very high. Therefore, it is possible to manufacture a retroreflective body having a remarkably high retroreflectivity for light having a specific incident angle. Therefore, when used as a retroreflective means for a variety of gaze-induced article used to guide the eye at night or rainy weather, such as a cover bottle or various traffic signs installed at the boundary of the road, the visibility of these articles can be greatly improved.

In addition, there is an advantage that the direction of the main reflector with the highest retroreflectivity can be easily changed without being limited by the angle by changing the direction of the corner of the reflecting corner or the self-reflecting corner which is easy to change the design.

Hereinafter, various embodiments of the retroreflective body according to the present invention as described above will be described in detail.

Example 1

1 is a perspective view of a retroreflective body according to Embodiment 1 of the present invention, FIG. 2 is a cross sectional view thereof, and FIG. 3 is a cross-sectional view taken along line X-X of FIG.

The retroreflective body 1 of Example 1 is made of a light transmissive material such as glass, crystal, polymethyl metaacrylate (PMMA), polycarbonate, ultraviolet curable resin, acrylic, etc., and is shown in FIGS. As shown in FIG. 1, the reflection reflection corner 11 formed by the step surface 112a, which is an imaginary plane contacting the shared reflection surface 111, and is perpendicular to the shared reflection surface 111 that is optically single plane, and the step surface 112a. It is provided with a retro-reflective unit (10) consisting of magnetically reflective corners (12) formed of two oil reflection surfaces (121, 122) formed in a longitudinal direction to each other in the longitudinal direction.

The retroreflective unit 10 is a retroreflective structure in which a total reflection prism reflection structure (described in detail later), which is made to totally reflect two perpendicularly reflective surfaces, that is, any of the reflection reflection corners 11. It has a complex total reflection prism type retroreflective structure in which magnetic reflection corners 12 composed of two oil reflection surfaces 121 and 122 perpendicular to the step surface 112a forming one reflective surface are formed in rows.

As shown in FIG. 4, the retroreflective unit 10 has a cube corner composed of three reflective surfaces perpendicular to each other along with the shared reflective surface 111 of the oil reflection surfaces 121. 122 of each magnetic reflection corner 12. By forming a retroreflective structure as shown in FIG. 1, light incident on each of the oil reflection surfaces 121 and 122 or the shared reflection surface 111 is retroreflected in the direction in which the light is projected.

In general, the respective oil reflection surfaces 121 and 122 and the shared reflection surface 111 of the magnetic reflection corner 12 are formed to be in contact with each other at a plane angle of 90 degrees. However, since the plane angle between these reflecting surfaces 111,121,122 is a distance between the actual light source and the observer, it is 90 degrees within an angle range of approximately 0 to 5 degrees so that the reflected light L _r can be diffused conically and reflected toward the observer. It may be designed larger or smaller. In addition, in order to prevent the light incident on the reflective surfaces forming the reflex reflection unit 10, that is, the shared reflection surface 111 and the oil reflection surfaces 121, 122, from being incident at an angle of incidence smaller than a critical angle on each reflective surface. Reflective layers such as, for example, mercury layers or aluminum layers can be coated.

In the above reflection structure, the smaller the aspect ratio (W / L) of each of the reflection corners 11 and 12 is, the smaller the size of the non-reflexive reflection area that occurs at the outer edges of the respective oil reflection surfaces 121 and 122 when the incident angle increases. This results in higher retroreflectivity. Therefore, the aspect ratio (W / L) of these reflection corners is preferably 1 or less.

On the other hand, the retroreflective body according to the present invention may be manufactured in the form of a metal plate that does not have a medium, that is, a metal plate having only the retroreflective unit by press-processing or die-casting with a glossy material.

The retroreflective body according to the present invention as described above is compared with the retroreflectors using cube corners, as well as the retroreflectors using a glass bead when the incident angle of the incident light (L _i ) is increased by the movement of a light source (for example, a car headlight). In addition, the retroreflectivity expressed as the ratio of the retroreflected light amount L _r to the incident light amount L _i is extremely high and the luminance is very high.

5A and 5B are diagrams showing a retroreflective area of a retroreflective body according to the present invention and a retroreflective body using a conventional cube corner in the same incident angle condition.

As shown in Figure 5a, the retroreflective body of the present invention is a retroreflective area (hatched area) that can be retroreflected to the ratio of the retroreflective area capable of retroreflection, that is, the apparent area (the area of the retroreflective unit seen from the light source side). The ratio of is much higher than the retroreflective body using the conventional cube corner shown in Fig. 5b under the condition that the refractive index of the body and the angle of incidence are the same. Therefore, the retroreflectivity is superior to that of the conventional retroreflective body and the reflection clock is also wide.

In general, the retroreflective body has a main reflecting direction (D) having the highest retroreflective rate due to the change of the retroreflective area according to the incident direction of light. Conventional retroreflectors using cube corners are very difficult to change the direction of the main reflection, commonly referred to as the optical axis, so that the main reflection (D) does not deviate significantly from the front of the exposure surface, that is, the surface exposed to the light source. In addition, since the retroreflectivity decreases rapidly when the incident angle of light increases, the reflecting clock capable of retroreflection is also very narrow.

On the other hand, the retroreflective body according to the present invention has the inclination β of the retroreflective unit incident surface 10a with respect to the exposure surface 1a, the corner direction D _m of the nevus corner, and the corner direction D _s of the specular reflection corner. Since the main reflection tends to be easily changed without being limited by the angle by changing design factors such as design change, etc. ), It is possible to manufacture various kinds of retroreflective bodies.

Example 2

The retroreflective body shown in FIG. 6 is a retroreflective body according to Example 2, in which the main reflector D having the highest retroreflective efficiency is the normal N of the exposure surface 2a, that is, the exposure surface 2a. It is deflected in a specific direction from the front direction of.

9 is the light incident on the incident surface (F) by the reflecting corner (C) in which the two reflection surfaces (R _1, R ₂₎ formed with the two reflecting surfaces sandwiched at a right angle (R _1, R ₂₎ A total reflection prism P is shown which can be retroreflected in the projected direction.

The total reflection prism P has a reflectance that varies according to the angle of incidence, and thus has a total reflection D that reflects all incident light back in the projected direction.

As shown in FIG. 10, the total reflection direction D of the total reflection prism P is defined as the midpoint M of the incident surface F at the corner E between the two reflection surfaces R ₁ and R ₂ when viewed in side cross-section. It depends on the corner direction (D _c ) defined in the direction of the connecting midline and the refractive index (n) of the medium, so that the width ratio of the two reflecting surfaces (a ₁ and b ₂ ) is a and b. The refractive index of the medium according to the deflection angle (α _c ) with respect to the normal line (N) of the incidence plane (F) of the corner direction (D _c ) determined by b / a) and Snell's law (n = sinα / sinα _c ) According to (n), with respect to the normal line N of the incident surface F, it has a deflection angle (alpha) represented by the following formula. The symbol θ used in the equation below is the angle between the incident surface F and the reflective surface R ₁ , and this angle θ is the corner direction D as can be seen from the enlarged view of FIG. _c ) is equal to the magnitude of the incident angle θ _i and the reflection angle θ _r with respect to the reflective surface R ₁ of the light incident and totally reflected.

The retroreflective body according to the present invention has a reflector having a reflective structure such as the total reflection prism (P) as described above, that is, a reflector having a retroreflective unit 20 in which the nevus corner 21 and the magnetic field corner 22 are combined. As a reflection structure formed by the reflection reflection corner 21 and the reflection reflection corner 22, light incident through the exposure surface 2a may be retroreflected in the projected direction. Accordingly, the retroreflective body according to the present invention changes the corner direction D _m of the nevus reflection corner 21 and the corner direction D _s of the magnetic reflection corner 2 according to the refractive index of the medium. By adjusting the deflection direction and deflection angle α _i of the internal main reflection direction D _i , the deflection direction and deflection angle α of the main reflection direction D having the highest retroreflectivity with respect to the incident light L _i . The design can be easily changed. That is, in the design stage, the width ratio (a / b) of the shared reflection surface 211 and the step surface 212 that determine the corner direction D _m of the reflection reflection corner 21 and the reflection reflection corner 22 By adjusting the width ratio (c / d) of the two oil reflection surfaces 221, 222 to determine the corner direction (D _s ), the internal main reflection direction (D _i ) of the retroreflective unit (20) is adjusted to the refractive index (n) of the medium. The main reflector D, which has the maximum retroreflectivity, can be easily designed and modified so as to be suitable for the use of the retroreflective body regardless of the deflection direction and the deflection angle α.

In the retroreflective body according to the second embodiment, the refractive index n of the medium is 1 and a single retroreflective unit 20 is formed to be in contact with the exposure surface 2a, so that the main reflecting mirror D is inside the retroreflective unit 20. It is the same retroreflective body as the main reflector (D _i ).

This retroreflective body 2 has the corner direction D _m of the nevus corner 21 deflected to the left as shown in the cross sectional view of FIG. 7, and is shown on the step surface 212a as shown in FIG. 8. The corner direction D _s of the magnetic reflection corners 22 formed in the same pattern is biased upward. Therefore, the internal main reflection direction D _i and the main reflection direction D of the retroreflective unit 20 having the same direction are deflected to the left upper side with respect to the normal line N of the exposure surface 20a, and incident from the upper left side. The reflected light can be retroreflected at the highest rate.

As can be seen from the reflector of this embodiment 2, the retroreflective body according to the present invention has a width ratio of each reflecting surface of the reflection reflector 21 and the magnetic reflector 22 according to the refractive index n of the medium at the design stage. (b / a, d / c) adjusts the deflection direction and deflection angle α _i of the internal main reflection direction D _i of the retroreflective unit 20 to adjust the direction and deflection angle of the main reflection direction D ( α) can be changed very easily.

For example, a retroreflective body 2 having a deflection angle α of 90 ° is designed to be mainly retroreflected to a light incident at an angle of incidence close to 90 degrees with a glass material having a refractive index of 1.5. In this case, the reflection surface width ratios b / a, d / c, etc. of the reflection reflection corner 21 and the reflection reflection corner 22 of the retroreflective unit 20 are adjusted to recurse to the exposure surface 20a. The reflection surface of the reflection reflection corner 21 and the reflection reflection corner 22 of the retroreflective unit 20 such that the deflection angle α _i of the internal main reflection direction D _i in the reflection unit 20 is 41.81 degrees. The width ratio (b / a, d / c) needs to be adjusted.

On the other hand, when the retroreflective body according to the present invention is designed with a material having a refractive index of n, since the incident angle of light incident on the exposure surface 20a does not exceed 90 degrees, the main reflection with respect to the normal line N of the exposure surface 20a It is preferable to limit the deflection angle α _i of the internal main reflection direction D _i of the retroreflective unit 20 so that the deflection angle α of the inclination D does not exceed 90 degrees. Do.

α _i ≤ Sin ^-1 [1 / n]

For reference, referring to the deflection angle α of the main reflection direction D of the retroreflective body according to the second embodiment shown in FIG. 6, the shared reflection surface 211 and the step surface of the reflection reflection corner 21 are shown. When the width of the 212a is a and b (a≥b), and the widths of the two oil reflection surfaces 221 and 222 of the magnetic reflection corner 22 are c and d, respectively (c≥d), the unit incident surface ( Corner direction D _m deflection angle α of the nevus corner 21 represented by the following equation (1) toward the side where the wide side 211 is transverse to the normal line N of 20a) _m ) Deflection corner (D _s ) deflection angle (α _s ), which is deflected by m) and expressed in the longitudinal direction (up and down direction in the drawing) toward the whole oil reflecting surface 221, expressed by the following equation (2): is deflected from the formula (3) each of (α _l) of the base corner reflective corner direction (D _m) direction component, which can be calculated as.

(1)

(One)

(2)

(2)

(3)

(3)

Example 3

FIG. 11 shows a retroreflective body according to the third embodiment, and FIG. 12 shows an X-ray cross-sectional view of FIG. 11.

As shown, the retroreflective body 3 of this Embodiment 3 is a sheet-like reflector in which the retroreflective units 31 and 33 having a complex prism reflecting structure are formed in a constant pattern.

As shown in FIGS. 13 and 14, which are cross-sectional views taken along lines YY and yy of FIG. 11, the retroreflective bodies 3 have symmetrical structures on the rear surface of the oil reflection surfaces 321, 322 and 341 and 342, respectively. Two kinds of retroreflective units 31 and 33 having opposite corner directions D _s of 32 and 34 are alternately formed in the transverse direction, so that the two main reflecting directions D ₁ are opposite to each other. ₂ ) Such a retroreflector can be retroreflective in both directions. Thus, for example, it can be used as a marker for increasing visibility of these markers on a road surface on a center line of a road or a crosswalk.

In this embodiment, the common reflection surfaces 311 and 331 and the step portions 312 and 332 which form the nevus reflection corners 31 and 33 are also similar to the reflection reflection corners 32 and 34. It may be formed to have a symmetrical structure.

Example 4

15 is a plan view of a retroreflective body according to Example 4;

The retroreflective body 4 is designed to retroreflect incident light having a large incident angle, and is shared with the step portion 412 made of magnetic reflective corners 42, as shown in FIG. The corner direction D _m of the reflection surface corner 41 made of the reflective surface 411 is deflected to either side (right side in the drawing) so that the main reflection direction D is the corner direction D _m of the reflection surface corner. It is deflected in the same direction and again deflected at a deflection angle α close to 90 degrees according to the refractive index n of the medium. Therefore, the retroreflective body 4 of this Example 4 can mainly retroreflect incident light whose main reflection direction D is deflected at an angle of almost 90 degrees with respect to the normal line N of the exposure surface, and the incident angle reaches almost 90 degrees. have. The retroreflective body 4 of the fourth embodiment can deflect the main reflecting mirror D in the lateral direction by adjusting the width ratios of the whole reflection surfaces 421 and 422 of the magnetic reflection corner 42.

Example 5

17 is a plan view of a retroreflective body of Example 5, and FIG. 18 is a cross-sectional view taken along line X-X of FIG.

As shown, the retroreflective body 5 of the fifth embodiment has a symmetrical structure in which the reflection reflection corners formed of the common reflection surfaces 51a, 52a and the step portions 51b, 52b are formed in a symmetrical structure, respectively. Two types of retroreflective units 51 and 52 having opposite corner deflection directions D _m are alternately arranged. Thus, the retroreflective body according to the fifth embodiment has two main reflectors D ₁ and D ₂ having opposite deflection directions as in the retroreflective body of Example 3, and thus can retroreflect in both directions.

Example 6

19 is a perspective view of a retroreflective body of Example 6, FIG. 20 is a sectional view taken along the line X-X of FIG. 19, and FIG. 21 is a sectional view taken along the line Y-Y of FIG.

As shown in Fig. 19, the retroreflective body 6 of the sixth embodiment includes two main retroreflective units 60 and 60 'each having a symmetrical structure in front and rear, respectively, so that two main opposing directions are deflected. It has reflecting directions D ₁ , D ₂ , and in particular, magnetic reflection corners 62, 64 of two retroreflective units 60, 60 ′ neighboring front and back as shown in the cross-sectional views of FIGS. 20 and 21. ) Are formed in a continuous structure on the same plane on the bottom, and the shared reflection surfaces 61 and 63 of each retroreflective unit (60, 60 ') are formed on the front and rear vertical sides, respectively, to produce a rectangular parallelepiped shape.

Such retroreflective body 6 is structurally dependent on the deflection angle α of the main reflection direction D mainly depending on the corner direction D _m of the nevus corner and the refractive index n of the medium. Therefore, the width ratio b between the shared reflecting surfaces 61 and 63 and the step portions 62 and 64, which are design factors for determining the deflection angle α in the corner direction by forming the nevus corner according to the refractive index n of the medium. / a), i.e., by adjusting the ratio between the front and rear length (l) and the height (h), the deflection angle α of both main reflections D can be easily changed from 0 to 90 degrees.

Therefore, when the retroreflective body 6 according to the sixth embodiment is made of a material having a refractive index of n, the widths (a) and (b) of the shared reflecting surfaces 61 and 63 and the step portions 62 and 64 in the design stage, By adjusting the ratio of the height h of the retroreflector 6 to the front and rear lengths l, the deflection angle α of the main reflection is obtained by applying the refractive index n of the medium to the corner direction D _m of the nevus corner. A retroreflective body capable of matching the incident angle i of mainly incident light, and as a result, can mainly produce retroreflective incident light L _i incident at a specific incident angle i.

In other words, when the incident angle (i) of the incident light is, the refractive angle (r) of the light is obtained according to Snell's law of refraction (n = sin i / sin r), as can be seen from the following equations, The ratio of the width (b / a) of the shared reflecting surfaces 61,63 and the step portions 62,64 of the retroreflective body such that the deflection angle α _m of the corner direction D _m of By designing and manufacturing a retroreflective body having a height (h) and a front and rear length (l) suitable for this ratio, a retroreflective body capable of mainly retroreflecting light having an incident angle i can be manufactured.

For example, when the retroreflective body according to the sixth embodiment is designed and manufactured so as to mainly retroreflect incident light (L _i ) having an incidence angle of approximately 90 degrees and -90 degrees with glass having a refractive index (n) of 1.5, the ratio of height and length Can be obtained as

Example 7

FIG. 22 is a plan view of a retroreflective body according to Embodiment 7 of the present invention, and FIG. 23 is a cross-sectional view taken along the line X-X of FIG.

As can be seen from FIGS. 22 and 23, the retroreflective body 7 according to the seventh embodiment is manufactured in the form of a sheet, and has a microrecursive surface having the same reflective structure as the retroreflective body 6 of the sixth embodiment on the bottom surface thereof. The reflection units 70 and 71 are formed in rows. And the exposure surface 7a is formed inclined downward to both sides with respect to the center.

The retroreflective body 7 of this structure is provided with two main reflecting mirrors D ₁ and D ₂ to enable bidirectional retroreflective, in particular, the reflector 6 of the above embodiment 6 in which the exposure surface 7a is a horizontal plane. Compared with, the apparent area of the exposure surface 7a exposed to incident light having a large incident angle is enlarged, so that the retroreflectivity is high for incident light having a large incident angle.

Example 8

24 is a perspective view of a retroreflective body according to Embodiment 8 of the present invention, FIG. 25 is a side cross-sectional view thereof, and FIG. 26 is a plan view thereof.

As can be seen from FIGS. 24 and 25, the retroreflective body 8 according to the eighth embodiment is formed with magnetic reflection corners and is in contact with the shared reflection surface 81 at right angles to the nevus reflection corner with the shared reflection surface 81. The step portion 82 for forming a is formed in the cylindrical step surface 82a.

The retroreflective body having such a structure can provide the same reflective structure in the radial direction to retroreflect light incident from all directions with the same retroreflectivity regardless of the incident direction.

In the retroreflective body according to the eighth embodiment, the step surface 82a may be formed in the shape of a polygonal surface consisting of a plurality of planes geometrically, such as a square pillar or an octagonal pillar.

Example 9

27 is a front perspective view of a retroreflective body according to Embodiment 9 of the present invention, FIG. 28 is a sectional view taken along the line Y-Y of FIG. 27, and FIG. 29 is a cross-sectional view taken along line X-X of FIG. 27.

In the retroreflective body 9 according to the ninth embodiment, the retroreflective units 90 are inclined forwardly downward on the inclined surface 90a formed to be inclined forward on the bottom surface, and the exposed surface 9a of the upper surface is viewed from the side. It is formed to have an arcuate cross section. The retroreflective body having such a structure exhibits a high retroreflectivity with respect to light whose incidence direction is shifted upward by the movement of the light source as the exposure surface 9a has an arcuate side cross section. Therefore, the retroreflective body according to the ninth embodiment can be used for a purpose such as a cover bottle for improving the visibility of the center line of the road, the boundary lines on both sides, and the like.

The above embodiments are merely examples given to specifically describe the technical idea of the present invention, and there may be many more embodiments of the present invention than the above embodiments. Therefore, the above embodiments should not be construed as limiting the technical spirit of the present application, and as a result, even if the technology is not presented in the above embodiment, even if there is a structural difference if the basic technical spirit of the present invention includes It should be construed as being included in the technical protection scope of the present application.

The retroreflective unit having the retroreflective unit and the retroreflective unit according to the present invention has a higher overall retroreflectivity due to a higher retroreflective rate than the conventional retroreflective bodies using a cube corner or glass bead and the like, and in particular, the incident angle of light increases. When the retroreflectivity is low, the luminance is much higher in the square, and the range of the reflective clock that can be retroreflected is much wider.

In addition, in the design stage, the direction of the main reflecting direction, that is, the direction of the reflecting clock, can be changed very easily without being limited to the direction and angle from the front of the exposure surface, so that various kinds of retroreflective bodies having different reflecting clock directions can be manufactured according to the use. Do.

Claims (18)

A shared reflecting plane that is an optical single plane; Comprising a pair of oil reflection surface in contact with each other at right angles to each other and a step portion consisting of a plurality of self-reflecting corners at the corners of the shared reflection surface and in contact with the shared reflection surface at right angles; A retroreflective unit, characterized in that the slope and the step portion is formed in contact with the perpendicular angle of the corner to form a bancho corner. A shared reflecting plane that is an optical single plane; Comprising a pair of oil reflection surface in contact with each other at right angles to each other and a step portion consisting of a plurality of self-reflecting corners at the corners of the shared reflection surface and in contact with the shared reflection surface at right angles; A retroreflective body comprising one or more; a retroreflective unit which forms a nevus corner by contacting the slope and the step portion at a right angle. The method of claim 2, The retroreflective unit is characterized in that the retroreflective units are formed in a densely arranged in a regular pattern. The method according to claim 2 or 3, A retroreflective body, characterized in that the aspect ratio (W / L) of the magnetic reflection corner is 1 or less. The method according to claim 2 or 3, A retroreflector, characterized in that the aspect ratio (W / L) of the nevus corner is 1 or less. The method according to claim 2 or 3, And the retroreflective units are geometrically arranged on a single plane. The method according to claim 2 or 3, And the corner direction of each of the reflex reflection corners of the retroreflective units is deflected at a deflection angle of 90 degrees or less with respect to the normal of the unit incident surface. The method according to claim 2 or 3, A retroreflective body characterized in that the retroreflective units of opposite corner deflection direction of the nevus corner are alternately arranged. The method according to claim 2 or 3, The retroreflective body of each of the retroreflective unit is formed to be formed on a geometrically single planar step surface. The method according to claim 2 or 3, The retro-reflective corner of each retroreflective unit is formed on a geometrically curved step surface. The method according to claim 2 or 3, The retroreflective corner of each retroreflective unit is a retroreflective body, characterized in that formed on the step surface of the polygonal surface consisting of a plurality of planes geometrically. The method according to claim 2 or 3, A retroreflective body characterized in that the corner direction of the magnetic reflection corners of the retroreflective unit has a deflection angle of 90 degrees or less with respect to the normal of the corner incidence surface. The method of claim 12, And a step portion of each retroreflective unit comprises retroreflective corners having the same corner direction. The method of claim 12, Each step portion of the retroreflective unit is a retroreflective body, characterized in that the alternating magnetic reflection corners are arranged in the opposite direction of the corner direction. The method according to claim 2 or 3, When the refractive index of the retroreflector is n, the deflection angle α _i of the internal main reflection of the retroreflective unit with respect to the normal of the exposure surface is α _i ≤ Sin ^-1 [1 / n] Retroreflective body characterized in that. The method according to claim 2 or 3, And a unit incidence surface of the retroreflective unit has an inclination with respect to the exposure surface. The method of claim 15, A retroreflective body characterized in that the retroreflective units of the opposite direction of the internal main reflection is arranged alternately. The method of claim 17, A retroreflective body characterized in that any one of the step portion or the shared reflecting surface of two retroreflective units in which the deflection directions of the internal main reflections cross each other is formed on a single plane geometrically.

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