KR20230097430A - Reclamation type pedestrian traffic light - Google Patents

Abstract

A buried pedestrian traffic light is disclosed. The buried pedestrian traffic light of the present invention includes a buried unit buried in the ground so that roads and sidewalks are disposed on one side and the other side, respectively; a lens unit coupled to the embedding unit and having an accommodation space formed on a lower surface thereof; And including a plurality of LEDs spaced laterally from each other, and a substrate accommodated in the accommodation space and having a solar cell installed between each of the plurality of LEDs, the LED and the solar cell can be installed horizontally, and the manufacturing is easy, Waterproof performance can last for a long time.

Description

Reclamation Type Pedestrian Traffic Light {RECLAMATION TYPE PEDESTRIAN TRAFFIC LIGHT}

The present invention relates to a buried pedestrian traffic light. In particular, the present invention relates to a buried type pedestrian traffic light in which LEDs are installed horizontally and can supply power to a solar cell.

The present invention relates to a buried pedestrian traffic light. In particular, the present invention relates to a buried type pedestrian signal light capable of maintaining waterproof performance for a long period of time.

In general, crosswalks are intended to enable vehicles to safely cross the road, and are mainly provided at intersections of roads or other places where there are many road crossings. In such a crosswalk, it is common that a crosswalk signal light is installed to periodically display a stop signal and a crosswalk signal, and the crosswalk signal light is installed at a certain height from the floor surface through a support.

However, there are an increasing number of people walking with their gaze directed toward the floor, such as people using mobile phones while walking or students carrying heavy bags. Pedestrians with these wrong walking habits are likely to cross the crosswalk without checking the signal of the crosswalk traffic light, and traffic accidents are actually increasing. Therefore, in order to solve this problem, a number of technologies have been proposed for floor traffic lights buried in the floor while emitting light of the same color in conjunction with the crosswalk traffic lights.

According to the standard guideline for assistive devices for floor-type pedestrian traffic lights, the light emitted from floor traffic lights should be inclined 10 degrees toward the sidewalk. As an example of the prior art of such floor traffic lights, there is one known in Korean Patent Registration No. 10-2274912 (Patent Document 1). As in Patent Document 1, a lighting board that is controlled in conjunction with a crosswalk traffic light on the inside is installed to tilt. Therefore, since there is a gap between the lighting substrate and the upper side of the cover frame, moisture inside the floor traffic light may cause a malfunction or make it difficult for a person to identify the light. In addition, since the lighting substrate and the upper side of the cover frame cannot be closely adhered to, there is a problem in that the durability of the floor signal lamp is low.

There is Korean Utility Model Publication No. 20-2011-0003871 (Patent Document 2) as a related patent for a road marker, a technology similar to floor traffic lights. Patent Document 2 is a technology for operating a light source LED with sunlight. Unlike Patent Document 1, the LED is installed horizontally, and the light of the LED is emitted on six sides from the light guide protrusion formed in the shape of a hexagonal pyramid on the top of the LED. However, since the light guiding protrusion is made of a flat surface, it may be difficult to emit light at an angle of 10 degrees in the direction of guidance, and it may be difficult to apply it as a floor traffic light because it protrudes excessively upward and may interfere with walking.

As another technology for road markers, there is Korean Utility Model Publication No. 20-0492413 (Patent Document 3). Patent Document 3 emits LED light to the side of a road marker and is not suitable for floor traffic lights.

As another technology of the road marker, there is Korean Patent Registration No. 10-1939632 (Patent Document 4). Patent Literature 4 is composed of a transparent cover portion, an LED bulb disposed obliquely on the lower side of the cover portion, and a solar panel disposed on the lower side of the cover portion. The upper surface of the cover part is composed of a curved surface with a different gradient from the magnifying glass part, which is the inner surface. Light from the LED bulb is diffused through the magnifying glass, and incident sunlight can be condensed to the solar panel. In this Patent Document 4, the problem that the LED bulb is not installed horizontally has not been solved.

Korean Registered Patent Publication No. 10-2274912 (2021.07.02) Korea Utility Model Publication No. 20-2011-0003871 (2011.04.20) Korea Utility Model Registration No. 20-0492413 (2020.09.29) Korean Registered Patent Publication No. 10-1939632 (2019.01.11)

The present invention aims to solve the foregoing and other problems.

Another object of the present invention is to secondaryly collect sunlight with a solar cell and use it as a power source for an LED.

Another object of the present invention is that LEDs are installed horizontally.

Another object of the present invention is that the light of the LED is irradiated obliquely with respect to the ground.

Another object of the present invention is to facilitate manufacturing of a lens unit.

Another object of the present invention is that the protrusion can diffuse the light of the LED together with the anti-slip function.

According to one aspect of the present invention for achieving the above or other object, a buried unit buried in the ground so that roads and sidewalks are disposed on one side and the other side, respectively; a lens unit coupled to the embedding unit and having an accommodation space formed on a lower surface thereof; And a plurality of LEDs spaced apart from each other laterally, and a substrate accommodated in the accommodation space and having a solar cell installed between the plurality of LEDs, wherein the lens unit is positioned above the solar cell to receive sunlight. a plurality of light concentrating units for condensing light; a plurality of primary bends formed concavely on the lower surface and forming accommodating grooves in which the plurality of LEDs are respectively accommodated; and a plurality of secondary refracting units convexly formed on an upper surface and respectively positioned above the primary refracting unit, wherein the light collecting unit comprises: a primary light collecting part that primarily collects sunlight; and a plurality of secondary concentrating parts positioned above the solar cell and secondarily condensing the primary condensed sunlight, the primary condensing parts being positioned between the plurality of secondary refracting parts, The secondary light-concentrating part is positioned between the plurality of primary refracting parts, and the curvature of the primary light-concentrating part is greater than the curvature of the secondary light-concentrating part.

The effect of the buried type pedestrian traffic light according to the present invention will be described as follows.

According to an embodiment of the present invention, the space required to install the LED and the substrate can be minimized, thereby minimizing structural distortion due to thermal expansion and contraction of air inside the lens, and a buried pedestrian traffic light in which the homeostasis of the waterproof structure is maintained for a long period of time. this can be provided.

According to an embodiment of the present invention, when light from the LED is irradiated onto the substrate, at least a portion of the light may be reflected by the lens unit, rerefracted by the refracting unit, and then irradiated to the outside of the lens unit. In addition, some of the light refracted by the primary refracting unit may be rerefracted into the lens unit and then radiated to the outside. Accordingly, a buried pedestrian traffic light in which loss of light is minimized can be provided.

According to an embodiment of the present invention, a buried pedestrian traffic light can be provided in which more light from the LED is radiated in the sidewalk direction through the first and third refraction parts to prevent the light from being seen on the side of the roadway.

According to an embodiment of the present invention, the primary concentrating part can condense sunlight close to the center of the secondary condensing part, and the secondary condensing part directs the primarily condensed sunlight to the center of the solar cell as well as to the solar cell. Since the light can be condensed in the first half of the light, a buried type pedestrian traffic light with good condensing efficiency of sunlight can be provided.

According to one embodiment of the present invention, the first bending part and the second bending part may be formed in an asymmetrical shape. Therefore, when the lens unit is manufactured by injection molding, the lens unit is prevented from falling out of the mold, and thus the lens unit is easily manufactured.

According to an embodiment of the present invention, a buried pedestrian traffic light is provided in which pyramid-shaped protrusions can uniformly diffuse LED light in all directions on the upper surface of the lens, thereby canceling the uniformity of the luminance distribution on the upper surface of the lens. It can be.

A further scope of the applicability of the present invention will become apparent from the detailed description that follows. Since various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present invention, are given by way of example only.

1 is a perspective view of a buried pedestrian traffic light according to an embodiment of the present invention;
2 is an exploded perspective view of a buried pedestrian traffic light according to an embodiment of the present invention;
Figure 3 is a perspective view for showing the lower side of the lens unit according to an embodiment of the present invention
Figure 4 is a view showing the AA cross section shown in Figure 1;
Figure 5 is a partially enlarged view shown in Figure 4
6 is a view showing a cross section of BB shown in FIG. 1;
7 is a view showing a rear surface of a lens unit according to an embodiment of the present invention;
8 is a diagram showing an example of a simulation result in which light of an LED is refracted through a lens unit according to an embodiment of the present invention.
9 is a plan view of a buried pedestrian traffic light according to an embodiment of the present invention
10 is a schematic diagram related to the operation of an LED according to an embodiment of the present invention.
11 is a circuit diagram related to an LED according to an embodiment of the present invention

The embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted. The suffixes 'module' and 'unit' for the components used in the following description are given or used interchangeably in consideration of ease of writing the specification, and do not have meanings or roles that are distinguished from each other by themselves. In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention , it should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "comprise" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

In the drawings, the sizes of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the illustrated bar.

When an embodiment is otherwise implementable, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may proceed in an order reverse to the order described.

1 is a perspective view of a buried pedestrian traffic light 10 according to an embodiment of the present invention.

In the lens unit 100, an arrow and a 'roadway' or 'india' may be embossed in the direction of the arrow. Arrows indicating 'roadway' and 'roadway' may be formed on one side of the upper surface of the lens unit 100 . Arrows indicating 'India' and 'India' may be formed on the other side of the upper surface of the lens unit 100 . Based on the buried type pedestrian traffic light 10, the roadway direction may be referred to as one side and the sidewalk direction as the other side. 1 to 9, one side of the buried pedestrian traffic light 10 is shown as A, the other side as B, the left side as L, and the right side as R.

Referring to FIG. 1 , a buried pedestrian traffic light 10 may include an buried unit 300 located at a lower side.

The buried pedestrian traffic light 10 may include a lens unit 100 coupled to the buried unit 300 . The lens unit 100 may be integrally formed. Since the lens unit 100 is integral, loss of light source can be minimized. A plurality of secondary refractive parts 150 may be formed on the upper surface of the lens unit 100 . That is, the secondary refraction part 150 may be formed on the upper surface of the lens unit 100 . The secondary bend 150 may be formed in a substantially hemispherical (DOME) shape. The plurality of secondary bends 150 may be respectively positioned above the plurality of primary bends 110 . Therefore, it is preferable that the number of primary bends 110 and the number of secondary bends 150 are the same. The plurality of secondary bends 150 may be formed parallel to one another and spaced apart from each other. Five secondary bends 150 are formed by being spaced apart from each other at regular intervals from one side to the other. When the five secondary bends 150 are viewed as one set, a set of secondary bends 150 may be further formed on the left or right side of the set of secondary bends 150 . 1, a total of 11 sets of secondary bends 150 are formed.

The lens unit 100 may include a first light collecting part 171 formed on an upper surface. A plurality of primary light collecting parts 171 are formed on the upper surface of the lens unit 100 to primarily collect sunlight. A plurality of primary light-collecting parts 171 may be formed spaced apart from each other by a predetermined interval. That is, a plurality of primary light-concentrating parts 171 may be formed between sets of adjacent secondary refraction parts 150 . In FIG. 1 , a plurality of primary light condensing parts 171 are formed in the lens unit 100 . The length of one side of the primary light collecting part 171 may be longer than the length of the left and right sides. The primary light collecting part 171 may be formed as wide as possible from one side to the other side of the lens unit 100 . Therefore, the primary light collecting part 171 can collect sunlight in a wide range as much as possible and has a good light condensing rate.

FIG. 2 is an exploded perspective view of the buried pedestrian traffic light 10 shown in FIG. 1 .

Referring to FIG. 2 , the lens unit 100 may include an upper lens 101 and a first sidewall 103 extending downward from all sides of the upper lens 101 .

The buried pedestrian traffic light 10 may include a substrate 210 . The substrate 210 may include a plurality of LEDs 220 installed to be spaced laterally apart from each other on an upper surface. The substrate 210 may include a plurality of solar cells 230 installed between the plurality of LEDs 220 . The substrate 210 may be formed of a glossy material with a white background. The substrate 210 may serve as a reflector for reflecting the light of the LED 220 toward the lens. Accordingly, when light from the LED 220 is irradiated onto the substrate 210, at least a portion of the light is reflected to the lens unit 100, then rerefracted by the refracting units 110 and 150, and then irradiated to the outside of the lens unit 100. It can be. Thus, loss of light is minimized.

The lens unit 100 may include a plurality of protrusions 160 formed on an upper surface. Six protrusions 160 are formed on the lens unit 100 and are spaced apart from each other by a predetermined distance in one direction. The protrusion 160 may be formed in a pyramidal shape. The protrusion 160 may be formed in a pentagonal pyramid shape. A side surface of the protrusion 160 may be formed in a triangular shape. The protrusion 160 may be formed by connecting five side surfaces to each other. The protrusion 160 may be located on one side and the other side of the secondary bend 150 , respectively. Therefore, among the light emitted from the LED 220, the light refracted to one side and the other side of the secondary refracting unit 150 is uniformly diffused in all directions from the upper surface of the lens unit 100 through each side surface of the protrusion 160. can Therefore, the protrusion 160 can cancel the uniformity of the luminance distribution on the upper surface of the lens, which may be insufficient.

The embedding unit 300 may include a lower plate 310 and a second side wall 320 extending upward from all sides of the lower plate 310 . A plurality of fastening parts 313 may be formed around the lower plate 310 of the embedding unit 300 . The embedding unit 300 may include a plurality of ribs 330 connected to the lower plate 310 and the second side wall 320 . An inner space 340 surrounded by the lower plate 310 , the second side wall 320 and the rib 330 may be formed in the embedding unit 300 . Components such as wires (not shown), batteries (B, see FIG. 10) related to power supply of the board 210 or the LED 220 may be disposed in the internal space 340 .

3 is a view for showing the lower side of the lens unit 100 according to an embodiment of the present invention.

Referring to FIG. 3 , an accommodation space 105 may be formed on a lower surface of the lens unit 100 . The accommodating space 105 may be formed inside the lens unit 100 surrounded by the upper lens 101 and the first sidewall 103 . A lower portion of the accommodation space 105 may be open.

A plurality of primary refractive parts 110 may be formed on the lower surface of the upper lens 101 . The plurality of primary bends 110 may be formed parallel to and spaced apart from one another. The primary bender 110 may be formed in the same number as the second bender 150 shown in FIG. 1 .

The lens unit 100 may include a secondary light collecting part 173 formed on a lower surface. The secondary light collecting part 173 may be formed in a concave shape on the lower surface of the upper lens 101 . A plurality of secondary concentrating parts 173 are formed on the lower surface of the lens unit 100 to secondarily converge sunlight that has been primarily condensed. A plurality of secondary light collecting parts 173 may be formed spaced apart from each other by a predetermined distance in the left and right directions of the lens unit 100 . A plurality of secondary light condensing parts 173 may be formed between adjacent primary refraction parts 110 . Secondary light collecting parts 173 may be formed in the same number as the first light collecting parts 171 .

The first sidewall 103 may include a support part 181 formed on the upper side. The support part 181 may be formed in a shape protruding from the inner surface of the first side wall 103 toward the receiving space 105 .

The lens unit 100 may include a contact portion 183 formed on a lower surface. The contact portion 183 may be formed on the lower surface of the upper lens 101 . The contact portion 183 may be connected to an upper end of the support portion 181 . The contact portion 183 may be formed in a shape that protrudes more toward the accommodation space 105 than the support portion 181 .

A plurality of bosses 185 may be formed on the first sidewall 103 . By simultaneously fastening a fastening member such as a bolt (not shown) to the boss 185 and the fastening part 313 (see FIG. 2 ), the lens unit 100 and the embedded unit 300 may be coupled to each other.

FIG. 4 is a view showing a cross section A-A shown in FIG. 1;

Referring to FIG. 4 , the embedding unit 300 may be buried in the ground G so that roads and sidewalks are disposed on one side and the other side, respectively. The lower side of the lens unit 100 may be buried in the ground (G). When the lens unit 100 and the embedding unit 300 are coupled, the lower portion of the accommodating space 105 may be closed. A substrate 210 may be accommodated in the accommodation space 105 .

When the lens unit 100 and the embedding unit 300 are coupled, the support portion 181 may contact the second sidewall 320 and the first sidewall 103 may be supported by the lower plate rim 311 . The lower plate rim 311 may have a shape protruding upward from the lower plate 310 of the embedding unit 300 .

An upper end of the protrusion 160 may be positioned higher than an upper end of the secondary bend 150 . Therefore, the possibility of a pedestrian stepping on the protrusion 160 increases, and thus the possibility of damage to the secondary bend 150 is low. Also, the protrusion 160 may serve to prevent slipping.

The primary bend 110 may be positioned on the upper side of the substrate 210 . The substrate 210 may be formed in a plate shape. The substrate 210 may be positioned between one support part 181a and the other support part 181b. The substrate 210 may contact the contact portion 183 . One side and the other side of the substrate 210 may be in contact with one side contact part 183a and the other side contact part 183b, respectively. The substrate 210 may contact the lower surface of the lens unit 100 . Specifically, the upper surface of the substrate 210 may come into contact with the lower surface of the contact portion 183 . Accordingly, the upper surface of the substrate 210 may be in surface contact with the lower surface of the lens unit 100 to form a closed space 107 .

The plurality of LEDs 220 may be accommodated in the plurality of receiving grooves 117, which are spaces formed by the plurality of primary bends 110, respectively. The receiving groove 117 may communicate with the closed space 107 . Therefore, the LED 220 can be accommodated in the closed space 107 and the receiving groove 117.

The lens unit 100 and the substrate 210 may be horizontally disposed on the embedding unit 300 . The lens unit 100 and the substrate 210 may be arranged parallel to the ground (G). The LEDs 220 may be disposed horizontally on the substrate 210 . The LED 220 may be installed on the substrate 210 without tilting. In this way, by installing the substrate 210 and the LED 220 not inclined with respect to the ground G or the lower surface of the upper lens 101, the space required to install the LED 220 and the substrate 210 can be minimized. there is. Accordingly, distortion of the lens unit 100, the substrate 210, and the embedding unit 300 due to thermal expansion and contraction of air inside the closed space 107 and the accommodation groove 117 can be minimized. By minimizing distortion, the homeostasis of the waterproof structure can be maintained for a long time. Since the empty space inside the lens is minimized compared to the prior art, air inflow into the receiving groove 117 and the closed space 107 can be minimized in the manufacturing and assembling steps of the embedded pedestrian traffic light 10 . In addition, since the air inside the receiving groove 117 and the closed space 107 minimizes repeated rapid expansion and contraction caused by the temperature difference with the outside air, the embedded walking traffic light has a long-lasting sealing effect at the junction of the components. It can be maintained, and the inflow of moisture into the buried pedestrian traffic light 10 can be blocked for a long period of time. At this time, the configuration may include the lens unit 100, the substrate 210, the embedding unit 300, and the solar cell 230.

FIG. 5 is a partially enlarged view of FIG. 4 .

Referring to FIG. 5 , the primary refraction part 110 may be concavely formed on the lower surface of the upper lens 101 . The primary refracting part 110 may include a primary first refracting part 111 that is inclined upward from one side to the other. The primary first refracting part 111 may be formed as a curved surface.

One end of the primary bending part 110 may be connected to the other end of the primary first bending part 111 . The primary refracting part 110 may include a primary second refracting part 112 that is convex upwardly from one end to the other. The primary second refracting part 112 may be formed as a curved surface. The primary second refracting part 112 may refract some of the light of the LED 220 into the lens unit 100 .

The primary refracting part 110 may include a primary third refracting part 113 having one end connected to the other end of the primary and secondary refracting part 112 . The one-side length between one end and the other end of the first-order third bend part 113 is formed longer than the one-side length from one end of the first-order first bend part 111 to the other end of the first-order second bend part 112. It can be. The primary refracting unit 110 may refract the light of the LED 220 so as to be radiated in the guidance direction as much as possible. The primary third refractive part 113 may be formed to be inclined downward from one end to the other. The primary third refractive part 113 may include an inclined surface. The minimum distance between the first-order third refractive part 113 and the LED 220 may be closer than the minimum distance between the first-order second-order refractive part 112 and the LED 220 . Accordingly, more light from the LED 220 is radiated toward the sidewalk through the primary third refracting part 113, so that the light can be prevented from being seen on the side of the roadway. The primary third refracting part 113 has a larger area than the primary first refracting part 111 or the primary second refracting part 112 so that light can be converged in the direction of delivery in the secondary refracting unit 150. may be formed.

The primary bending part 110 may include a first-order fourth bending part 114 having one end connected to the other end of the first-order third bending part 113 . The primary fourth refractive part 114 may be formed to be inclined downward from one end to the other. The primary fourth refractive part 114 may be formed as an inclined surface. The slope of the first-order fourth refractive part 114 may be greater than the slope of the inclined surface of the first-order third refractive part 113 .

The secondary refractive portion 150 may be convexly formed on the upper surface of the upper lens 101 . The secondary bending part 150 may include a secondary first bending part 151 . One end of the secondary first refractive part 151 may be positioned above the primary first refractive part 111 . The secondary first refracting part 151 may be formed as a curved surface inclined upward from one end to the other. The secondary first refracting part 151 can minimize the refraction of light in the direction of the road and maximally refract the light in the direction of the road.

The secondary bending part 150 may include a secondary second bending part 152 . One end of the secondary second refractive part 152 may be positioned above the primary third refractive part 113 . One end of the secondary second bending part 152 may be connected to the other end of the secondary first bending part. The secondary second refracting part 152 may be formed as a curved surface inclined downward from one end to the other.

The curvature of the secondary first bend part 151 may be smaller than the curvature of the second secondary bend part 152 . The length of the other side of the secondary first refracting part 151 may be longer than the length of the other side of the second secondary refracting part 152 .

Meanwhile, the first bend 110 and the second bend 150 may be collectively referred to as the bends 110 and 150 .

FIG. 6 is a view showing a cross section B-B shown in FIG. 1;

Referring to FIG. 6 , the first light collecting part 171 may be disposed below the second light collecting part 173 . The secondary light collecting part 173 may be spaced apart from the upper side of the solar cell 230 . The solar cell 230 may be positioned below the secondary light collecting part 173 . The curvature of the primary light-collecting part 171 may be larger than that of the secondary light-collecting part 173 . The left and right length of the primary light collecting part 171 may be shorter than the left and right length of the second light collecting part 173 . The upper and lower length of the first light collecting part 171 may be longer than the upper and lower length of the second light collecting part 173 . The left and right lengths of the secondary light collecting part 173 may be longer than the left and right lengths of the solar cell 230 . Accordingly, the primary concentrating part 171 may concentrate sunlight close to the center of the secondary condensing part 173 . Furthermore, the secondary concentrating part 173 may condense the primary condensed sunlight not only to the center of the solar cell 230 but also to the entire solar cell 230 . Accordingly, since sunlight is condensed twice through the concentrating unit 170, the condensing efficiency of sunlight is good.

Since the plurality of refractive parts 110 and 150 radiate the light of the LED 220 to the outside of the lens unit 100 while being spaced apart from each other by a predetermined distance, the light of the LED 220 can be uniformly irradiated over a wide range. The concentrating unit 170 is formed between the refracting units 110 and 150 to collect sunlight in a wide range. Therefore, since the refracting parts 110 and 150 and the light concentrating part 170 are maximally installed in the minimum area, the embedded pedestrian traffic light 10 has good light irradiation efficiency and sunlight concentrating efficiency compared to its volume.

The first light collecting part 171 and the second light collecting part 173 may collectively be referred to as the light collecting part 170 . Accordingly, the light collecting unit 170 may be positioned above the solar cell 230 to collect sunlight a total of two times.

Referring to FIGS. 3, 5, and 6, the contact portion 183 may include left and right contact parts 183a, 183b, 183c, and 183d respectively formed on the left side, right side, one side, and the other side of the lens unit 100. can In this case, both sides of the left contact part 183c, the right contact part 183d, one contact part 183a, and the other contact part 183b may be connected to the other contact parts 183a, 183b, 183c, and 183d. Therefore, the contact portion 183 may be formed in a band shape. Referring to FIGS. 4 and 6 , the left and right sides of the substrate 210 may be in contact with the contact parts 183a, 183b, 183c, and 183d. As a result, a closed space 107 surrounded by the substrate 210, the contact parts 183a, 183b, 183c, and 183d, and the upper lens 101 may be formed. Therefore, water or foreign matter may be prevented from entering the closed space 107 . Referring to FIG. 6 , the left and right sides of the substrate 210 may be in contact with the left contact part 183c and the right contact part 183d, respectively.

7 is a view showing the rear surface of the lens unit 100 according to an embodiment of the present invention.

Referring to FIG. 7 , a plurality of secondary light condensing parts 173 are formed in the lens unit 100 . A length of one side of the secondary light collecting part 173 may be longer than lengths of left and right sides.

Like the secondary bend 150 (refer to FIG. 9 ), the primary bend 110 may be formed in an approximately elliptical shape.

The primary first refractive part 111 may be formed to surround the primary second refractive part 112 .

The primary first refractive part 111 may be formed to surround the primary third refractive part 113 .

The primary second refracting part 112 may be formed such that the left-right length increases from one side to the other side.

The first-order third refractive part 113 may include a 3-1-th refractive member 113a having one side connected to the first-order second refractive part 112 . The 3-1st bending member 113a may be located on one side of the primary third bending part 113 . The primary third refractive part 113 may include a 3-2 refractive member 113b having one side connected to the other side of the 3-1 refractive member 113a. The 3-2nd bending member 113b may be located on the other side of the primary third bending part 113 .

The 3-1st bending member 113a may be located at the center of the primary bending part 110 .

The left and right lengths of the 3-2nd bend member 113b may be greater than the left and right lengths of the 3-1st bend members 113a. Accordingly, the 3-2 refracting member 113b can refract the light of the LED 220 (refer to FIG. 8) as much as possible in the guiding direction, thereby improving the visibility of light in the guiding direction.

The support part 181 may include one support part 181a, the other support part 181b, the left support part 181c, and the right support part 181d formed on one left and right side of the lens unit 100, respectively.

8 is a diagram showing an example of a simulation result in which light L of the LED 220 is refracted through the lens unit 100 according to an embodiment of the present invention. In FIG. 8, illustration of the protrusion 160 (refer to FIG. 5) is omitted.

Referring to FIG. 8 , the primary refraction unit 110 may serve as a concave lens. Accordingly, the loss of light L may be minimized by concentrating the light L of the LED 220 into the secondary refracting unit 150 . The secondary refraction part 150 may serve as a convex lens. Accordingly, the light L of the LED 220 can be irradiated in the direction of guidance. The lens unit 100 may be formed asymmetrically by the refractive parts 110 and 150 . Specifically, the primary bend 110 may be formed in an asymmetrical shape. One side and the other side of the primary bend 110 may be formed asymmetrically. The secondary bend 150 may be formed in an asymmetrical shape. One side and the other side of the secondary bend 150 may be formed asymmetrically. Therefore, when the lens unit 100 is manufactured by injection molding, a phenomenon in which the lens unit 100 does not fall out of the mold is prevented, and thus manufacturing of the lens unit 100 is easy. In addition, an effect in which the light L of the LED 220 is asymmetrically emitted to the sidewalk side and the roadway side may occur. In addition, one embodiment of the present invention, as described above in the background art, has the same or better effect as installing the LED 220 at an angle of about 10 degrees toward the sidewalk. In addition, in one embodiment of the present invention, the light (L) irradiated from the side of the road to the side of the sidewalk can be prevented from being seen.

Specifically, the primary first refracting part may refract a part of the light L of the LED 220 to one side. The primary first refracting part may refract part of the light L of the LED 220 into the lens unit 100 .

The primary second refracting part 112 may refract a part of the light L of the LED 220 to one side and the secondary refracting part 150 side. Accordingly, some of the light L may be refracted by the upper surface of the lens unit 100 and the secondary first refracting part 151 and then irradiated toward the roadway.

The primary third refracting part 113 may refract the light L of the LED 220 toward the other side and the secondary refracting unit 150 side. At this time, most of the light L refracted by the secondary refracting unit 150 may be refracted and irradiated in the direction of delivery.

The primary fourth refracting part 114 may refract a part of the light L of the LED 220 to the other side.

A portion L1 of the light L refracted by the primary refracting unit 110 is a part of the lens unit 100 on the top surface 100c, one side surface 100a, and the other side surface 100b of the lens unit 100. After being rerefracted to the inside, after being refracted by at least one of the primary refraction part 110 and the secondary refraction part 150 in the lens unit 100, that is, the lower surface 100d of the upper lens 101, the outer ( roadway, sidewalk direction) can be investigated. In this way, by returning the light L to the inside of the lens unit 100, it is possible to recycle at least a portion of the light L that is not emitted to the outside, thereby minimizing the loss of the light L of the LED 220. can At this time, although only one portion L1 of rerefracted light is shown as a dotted line in FIG. 8 , there may be more than one.

The other end of the secondary bend 150 may be located on the other side of the other end of the primary bend 110 . Accordingly, the other end of the secondary bend 150 may be located closer to India than the other end of the primary bend 110 . The secondary refracting unit 150 may refract at least 50% of the light L toward an Indian side with respect to the vertical optical axis V. Therefore, since the secondary refracting unit 150 radiates the light L as much as possible in the direction of the sidewalk, the visibility of a pedestrian (not shown) can be improved. Specifically, the secondary first refracting part 151 may refract some of the light L in the roadway direction A and the other part in the Indian direction B. The secondary second refracting part 152 may refract the light L refracted by the primary refracting unit 110 toward an Indian side with respect to the vertical optical axis V of the LED 220 .

9 is a plane view of the lens unit 100 according to an embodiment of the present invention.

Referring to FIG. 9 , the secondary bend 150 may be formed in an approximately elliptical shape. The maximum length of one side of the secondary bend 150 may be shorter than the maximum length of the left and right sides.

The left and right lengths of the primary light collecting part 171 may be longer than the maximum left and right lengths of the secondary refraction part 150 .

The protrusion 160 may have a smaller cross-sectional area than the secondary bend 150 . The left and right lengths and one other side length of the protrusion 160 may be shorter than the left and right side lengths or one other side length of the secondary bend 150 .

10 is a diagram showing a system diagram related to the operation of the LED 220 according to an embodiment of the present invention.

Referring to FIG. 10 , the buried pedestrian traffic light 10 may include a control unit included in a substrate 210 . The control unit may include a reference input element (S) connected to the solar cell 230 . The controller may include a battery B connected to the reference input element S. The controller may include a constant current circuit (CC) connected to the LED 220 . The control unit may include a controller connected to the constant current circuit (CC) and the battery (B). The control unit may include a feedback F for receiving a signal supplied from the controller CR to the constant current circuit CC and supplying the signal to the battery B. The feedback (F) can control the operation of the embedded pedestrian traffic light in the same way as the operation state of a general pedestrian traffic light. Feedback (F) causes solar power to be used first among general electric power supplied through wires or solar power formed through the solar cell 230 . The control unit may include a constant power supply (OP) connected to the constant current circuit (CC) to supply power.

The basic power for lighting the LED 220 may give priority to the solar cell 230 . However, when it is difficult to supply power to the LED 220 only with the solar cell 230, the LED 220 can be turned on by the regular power supply (OP). Therefore, since the buried pedestrian traffic light 10 uses dual complementary power sources, the LED 220 can be continuously turned on through the monitoring circuit at all times. That is, the buried pedestrian traffic light 10 can express the pedestrian signal without interruption.

11 is a circuit diagram related to the LED 220 according to an embodiment of the present invention.

Referring to FIG. 11 , the control unit may include a power selection unit (PC). The control unit may include a green signal constant current unit GC connected to the LED 220 . The control unit may include a red signal constant current unit (RC) connected to the LED 220 . The control unit may include an operation preventing unit MP. When the main power is cut off, the operation prevention unit MP may be connected to the power selection unit PC. The operation preventing unit MP may prevent operation when the main power is cut off. The controller may include a low voltage booster (LP). The low voltage booster LP may be connected to the power selector PC and the low voltage booster LP. The operation prevention unit (MP) can always sense the power of the control unit. Operation prevention can forcibly turn off the LED 220 by cutting off the power of the green signal constant current part (GC) and the red signal constant current part (RC) in order to prevent the LED 220 from being turned on when the power is cut off. .

Any or other embodiments of the present invention described above are not mutually exclusive or distinct from each other. Certain or other embodiments of the present invention described above may be used in combination or combination of respective components or functions.

It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. The above detailed description should not be construed as limiting in all respects and should be considered illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the present invention are included in the scope of the present invention.

10: buried pedestrian traffic lights
100: lens unit
101: upper lens
110: primary bend
150: secondary bend
160: protrusion
170: light collector
210: substrate
220: LED
230: solar cell
300: buried unit
G: ground
L: light

Claims (5)

A buried unit buried in the ground so that roads and sidewalks are disposed on one side and the other side, respectively;
a lens unit coupled to the embedding unit and having an accommodation space formed on a lower surface thereof; and
It includes a plurality of LEDs spaced laterally from each other, and a substrate accommodated in the accommodation space and having a solar cell installed between each of the plurality of LEDs,
The lens unit,
a plurality of concentrating units positioned above the solar cell to condense sunlight;
a plurality of primary bends formed concavely on the lower surface and forming accommodating grooves in which the plurality of LEDs are respectively accommodated; and
It is formed convexly on the upper surface and includes a plurality of secondary bends each positioned above the first bend,
The light collector,
a primary concentrating part that primarily condenses sunlight; and
It is located on the upper side of the solar cell and includes a plurality of secondary condensing parts for secondary condensing the primary condensed sunlight,
The primary light-collecting part is positioned between the plurality of secondary refracting parts,
The secondary light collecting part is positioned between the plurality of primary refracting parts,
Wherein the curvature of the primary light-concentrating part is greater than the curvature of the secondary light-concentrating part. According to claim 1,
The lens unit and the substrate are disposed horizontally with respect to the embedding unit,
The LED is disposed horizontally on the substrate,
The lower surface of the lens unit and the upper surface of the substrate are in surface contact with each other to form a closed space, the closed space communicates with the receiving groove, and the LED is accommodated in the closed space and the receiving groove.
Recessed pedestrian traffic lights. According to claim 1,
The first bend is formed so that one side and the other side are asymmetrical to each other,
The secondary bend is formed so that one side and the other side are asymmetrical to each other,
Recessed pedestrian traffic lights. According to claim 1,
The lens unit includes a plurality of protrusions formed on an upper surface,
The protrusion is formed in a pyramid shape and includes a plurality of side surfaces,
The protrusion is located on one side and the other side of the secondary refracting part, so that a part of the light emitted from the LED is diffused in all directions from the upper surface of the lens unit through the plurality of side surfaces.
Recessed pedestrian traffic lights. According to claim 2,
The substrate is formed of a glossy material on a white background and serves as a reflector for reflecting the light of the LED toward the lens unit.
Recessed pedestrian traffic lights.

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