Floor-type walking signal device

The present invention provides a floor-type walking signal device for installation in which the device is buried in the ground between a road and a sidewalk, comprising a reflector having a plurality of reflective surfaces respectively corresponding to a plurality of LED elements. The present invention can prevent the luminance from being lowered by using the reflector, even if the distance between light-emitting surfaces and the LED elements is relatively long, and can improve the luminance uniformity on the light exit surfaces.

TECHNICAL FIELD

The present disclosure relates to a floor-type walking signal device, and more specifically, to a floor-type walking signal device that improves visibility to pedestrians.

BACKGROUND ART

A floor-type walking signal device is buried in the ground such as a road and emits signaling light through an upper surface thereof. The floor-type walking signal device is highly evaluated for effectiveness because it may be positioned in a gaze direction while providing a function of a stop line or a guide line to pedestrians. In particular, there is an advantage in that it is possible to easily provide signal information to pedestrians in line with the recent increase in the number of pedestrians walking while looking at their smartphones.

However, unlike traffic lights installed on pillars, the floor-type walking signal device is buried in the ground, such as a concrete or an asphalt, and the upper surface thereof should constantly withstand loads and impacts from pedestrians, motorcycles, and in some cases, vehicles and the like and may be submerged in snow or rainwater in precipitation or snowfall situations. As described above, the floor-type walking signal device has a poor installation environment and should operate stably for a long time.

In addition, the floor-type walking signal device should maximize visibility to pedestrians while minimizing a driver's driving interference. The floor-type walking signal device installed at the border between a road (crosswalk) and a sidewalk usually displays three signals: red, green, and green flashing, and it is preferable to minimize these signals because they may cause visual obstruction or confusion to drivers of vehicles.

SUMMARY OF INVENTION

Technical Problem

The present disclosure is directed to providing a floor-type walking signal device, which may include a reflector having a reflective surface for improving luminance uniformity on a light-emitting surface, thereby improving visibility to pedestrians while minimizing a driver's driving interference.

Solution to Problem

In order to achieve the object, a floor-type walking signal device installed by being buried in the ground between a road and a sidewalk according to an embodiment of the present disclosure includes a body unit including a base surface inclined upward from one side to the other side, a light emitting diode (LED) module which is installed on the base surface of the body unit and on which a plurality of LED devices configured to generate signaling light are disposed in a matrix, and a reflector disposed on an upper portion of the LED module and including a plurality of reflective surfaces corresponding to each of the plurality of LED devices, wherein the plurality of reflective surfaces are classified in a unit of column and separately defined as first to nth(n is a natural number) column reflective surface groups sequentially from a position close to one side to a position far from the one side, each of the first to nthcolumn reflective surface groups includes a first wall surface and a second wall surface disposed at intervals in a width direction of the reflector, a first virtual line extending downward from the first wall surface and a second virtual line extending downward from the second wall surface form a virtual angle at an intersection point, and at least two of the first to nthcolumn reflective surface groups have different virtual angles, and as the column reflective surface group is closer to the one side, the virtual angle is formed to be smaller.

Each of the first to nthcolumn reflective surface groups may be formed to have a different virtual angle.

Open upper end portions of the first to nthcolumn reflective surface groups may be all formed to have the same area, and open lower end portions of the first to nthcolumn reflective surface groups may be all formed to have the same area.

Open upper end portions of the first to nthcolumn reflective surface groups may be all formed to have the same width, and open lower end portions of the first to nthcolumn reflective surface groups may be all formed to have the same width.

The first wall surface and the second wall surface of each of the first to nthcolumn reflective surface groups may be inclined in a direction that moves away upward with respect to a vertical line passing through the open upper end portion and lower end portion of each of the first to nthcolumn reflective surface groups.

A lower surface of the reflector may be formed as an inclined surface corresponding to the base surface of the body unit, the lower surface of the reflector and the base surface may be disposed to face each other, and an upper surface of the reflector may be disposed horizontally.

The floor-type walking signal device may further include a cover unit coupled to an upper edge of the body unit and accommodating the reflector and an upper portion of the body unit, a gasket interposed between an upper edge of the body unit and a lower end of the cover unit and configured to block the introduction of external moisture, and a buffering sheet interposed between an inner surface of the cover unit and an upper surface of the reflector and configured to perform a buffering operation.

A plurality of anti-slip protrusions may be formed to protrude from an upper surface of the cover unit.

The cover unit may include a nut on a side wall thereof, the body unit may be formed with a plurality of first insertion holes at intervals along a circumference of an upper edge thereof and a plurality of second insertion holes at intervals along a circumference of a lower edge thereof, and a bolt fitted into the second insertion hole of the body unit may be fastened to the nut of the cover unit by passing through the first insertion hole.

The first insertion hole may be formed to have a smaller diameter than the second insertion hole to form a stepped surface therebetween, and a head portion of the bolt may be supported by the stepped surface between the first insertion hole and the second insertion hole.

The cover unit may include a nut fitting groove formed in the side wall thereof, and the nut may be fitted into the nut fitting groove in a horizontal direction so that a nut hole at the center may be located at a position corresponding to the first insertion hole.

Signaling light generated from each of the plurality of LED devices may be emitted at an angle inclined from verticality toward a sidewalk.

An internal space may be formed between a bottom surface disposed on a lower portion of the body unit and the base surface, and a cable for supplying power and transmitting control signals to the LED module may be installed in the internal space.

The body unit may have both end portions in a longitudinal direction formed with a first connection hole and a second connection hole, the cable may have one end portion provided with a first adapter and the other end portion provided with a second adapter, a length between the first adapter and the second adapter is stretchable and contractable, the first adapter may be provided in a state of being drawn out outward through the first connection hole, the second adapter may be disposed in the internal space of the body unit, and the first adapter may be connected to neighboring another walking signal device, and when connected to another walking signal device, inserted into the internal space of the body unit through the second connection hole and connected to the second adapter.

Advantageous Effects of Invention

According to the present disclosure, by classifying the plurality of reflective surfaces of the reflector in a unit of column, separately defining the classified the first column to the nth(n is a natural number) column reflective surface group, and forming the virtual angle of the reflective surface group close to one side that is smaller than the virtual angle of the reflective surface group far from the one side, it is possible to prevent the decrease in luminance even when the distance between the light-emitting surface and the LED device is relatively longer, thereby improving luminance uniformity on the light-emitting surface.

In addition, according to the present disclosure, by providing the walking signal lit on the floor of the crosswalk waiting line, it is possible to prevent the accidents that occur because pedestrians with their heads down while looking at smartphones or the like may not recognize the surrounding situation.

In addition, according to the present disclosure, by fastening the bolt passing through the first and second insertion holes and the bolt hole of the cover unit to the nut provided on the side wall of the body unit, it is possible to firmly couple the body unit to the cover unit and reduce the component manufacturing cost and the product manufacturing cost.

DESCRIPTION OF EMBODIMENTS

FIG.1is a view illustrating a state in which a floor-type walking signal device1according to an embodiment of the present disclosure is installed by being buried in the ground.

As illustrated inFIG.1, the plurality of floor-type walking signal devices1may be installed by being buried in the ground at one side of a crosswalk curb30installed between a road10and a sidewalk20. As will be described below, the plurality of floor-type walking signal devices1may be connected in a left-right direction using a cable C (seeFIG.2).

The plurality of floor-type walking signal devices1may be electrically connected to a signal controller2positioned outside roads or the like and interworked to a crosswalk traffic light (not illustrated). For example, when a red lamp of the crosswalk traffic light is turned on under the control of the signal controller2, a red light emitting diode (LED) device221(seeFIG.7) in the floor-type walking signal device1may be turned on together to emit red light. In addition, when a green lamp of the crosswalk traffic light is turned on under the control of the signal controller2, a green LED device222(seeFIG.7) in the floor-type walking signal device1may be turned on together to emit green light. As described above, the floor-type walking signal device1installed by being buried in the ground may be displayed in red, green, and green flashing by the signal controller2so that a pedestrian walking while looking at a mobile phone with his/her head down may recognize a surrounding situation.

FIG.2is a perspective view illustrating the floor-type walking signal device according to the embodiment of the present disclosure,FIG.3is an exploded perspective view illustrating a plan side of the floor-type walking signal device according to the embodiment of the present disclosure, andFIG.4is an exploded perspective view illustrating a lower surface side of the floor-type walking signal device according to the embodiment of the present disclosure.

As illustrated inFIGS.2to4, the floor-type walking signal device1according to the embodiment of the present disclosure may include a body unit100, an LED module200, a reflector300, a driving module400, and a cover unit500.

The body unit100may include a base surface110inclined upward from one side to the other side thereof. The inclination of the base surface110is to enable the LED module200to be installed at an inclined angle of about 10 degrees. The base surface110may be formed at a height on the sidewalk20side lower than a height on the road10side. By installing the LED module200on the base surface110, the signaling light generated from each of the plurality of LED devices220of the LED module200may be emitted at an angle inclined at an angle of about 10 degrees from verticality toward the sidewalk20.

Therefore, pedestrians waiting at a signal on the ground between the road10and the sidewalk20may more easily recognize the light generated from the LED module200. In addition, it is possible to increase the light directed to the pedestrians while minimizing the interference of the light directed to the driver of the vehicle. In other words, it is possible to further improve the pedestrian's visibility while reducing the driver's driving interference.

A plurality of holes111may be formed in the base surface110at predetermined intervals. The holes111of the base surface110may be formed to correspond to installation holes211of the LED module200and lower protrusions332of the reflector300. In other words, since the lower protrusions332of the reflector300may be inserted by passing through the installation holes211of the LED module200and the holes of the base surface110, the LED module200and the reflector300may be easily aligned at a predetermined coupling position on the base surface110. The body unit100may be made of polycarbonate, but is not limited thereto.

Meanwhile, the cover unit500may be coupled to an upper edge130of the body unit100and formed with an accommodation space510that accommodates the reflector300and an upper portion of the body unit100.

The cover unit500may include a rectangular upper plate520with a flat upper surface and a side wall530extending downward from an edge of the upper plate520.

The upper plate520of the cover unit500may have a surface formed with a plurality of anti-slip protrusions521. The plurality of anti-slip protrusions521are for preventing slip and are preferably designed to have a slip resistance of 40 BPN or more.

The cover unit500may be made of a light-transmitting material such as polycarbonate and is preferably made of a material to maintain chemical and corrosion resistance. In addition, the cover unit500is preferably made of a material to withstand loads and impacts from pedestrians and motorcycles, and in some cases, vehicles and the like, and a thickness of the upper plate520may be about 8 mm.

As will be described below, referring toFIG.8, a long nut N1may be fitted into the plurality of holes formed at intervals along an edge of an upper portion of the side wall530of the cover unit500. In addition, a plurality of bolt holes531may be formed at intervals along an edge of a lower portion of the side wall530of the cover unit500. Upper portions of the plurality of bolt holes531may be formed to be connected to the nut N1, and lower portions of the plurality of bolt holes531may be formed to be connected to the first insertion holes131of the body unit100. Therefore, a fastener, such as a bolt, fitted into the first insertion hole131at a lower end of the body unit100may be fastened to the nut N1by passing through the bolt holes531of the cover unit500, and thus the body unit100and the cover unit500may be firmly coupled. A coupling structure of the body unit100and the cover unit500will be described in detail below with reference toFIG.8.

Referring toFIGS.3and4, a gasket600may be interposed between the upper edge130of the body unit100and a lower end of the cover unit500and formed in a ring shape corresponding to the circumference of the lower end of the cover unit500. For example, the gasket600may be provided in a rectangular ring shape. The gasket600includes a fastening hole610formed along an edge thereof. Since the fastening hole610of the gasket600is formed to correspond to the first insertion hole131of the body unit100and the bolt hole531of the cover unit500, the fastening hole610may be pressed as a fastener such as a bolt is fastened in a state of being interposed between the cover unit500and the body unit100. The gasket600may perform dustproof and waterproof functions for preventing water or contaminants from permeating into a gap between the cover unit500and the body unit100. In other words, when water, moisture, or the like is introduced from the outside, the gasket600may be provided to prevent a problem such as a disconnection or a short circuit due to corrosion of circuit patterns formed in the LED module200and the driving module400. As for the gasket600, a rubber gasket such as EPMD or Viton may be used, but the present disclosure is not limited thereto.

A buffering sheet S may be interposed between an inner surface of the cover unit500and an upper surface320of the reflector300and provided to perform a buffering operation between the inner surface of the cover unit500and the upper surface320of the reflector300. The buffering sheet S may be made of a material such as silicon, rubber, or sponge. Since a first hole H1is formed to correspond to an open upper end portion321of the reflector300, the buffering sheet S does not cover the open upper end portion321even when disposed on the upper surface320of the reflector300. In addition, since the buffering sheet S has a second hole H2formed to correspond to the upper protrusion322of the reflector300, the second hole H2may be fitted into the upper protrusion322of the reflector300and thus easily disposed at a predetermined position.

FIG.5is an exploded perspective view illustrating a portion of a driving module in a body unit inFIG.3.

Referring toFIG.5, the body unit100may be formed with an installation groove120for installing the driving module400. The installation groove120may be provided as a space between a protective housing180and the base surface to which the cable C is connected.

The driving module400may be provided to control the driving of the LED module200, and a plurality of fixing grooves410may be formed at intervals at an edge thereof. In addition, the body unit100may have a fixing hole121aformed in each of the plurality of installation surfaces121provided in the installation groove120, and the fixing hole121amay be formed to correspond to the fixing groove410of the driving module400. Therefore, the driving module400may be detachably coupled to the installation surface121of the body unit100by a fastener (not illustrated), such as a bolt, passing through the fixing groove410and the fixing hole121a.

FIG.6is an exploded perspective view illustrating a portion of a bottom surface of the body unit inFIG.4.

Referring toFIG.6, the body unit100may have a plurality of coupling holes142formed at intervals along the circumference of a lower edge140. The coupling hole142is formed for coupling with a bottom surface150, and the bottom surface150may be formed with a through hole151corresponding to the coupling hole142of the body unit100. Therefore, the bottom surface150may be detachably coupled to the lower edge140of the body unit100by a fastener (not illustrated), such as a bolt, passing through the through hole151and the coupling hole142.

As described above, the bottom surface150disposed on the lower portion of the body unit100may cover only a portion of an internal space160of the body unit100so that the heat transferred from the LED module200may be easily dissipated. In other words, the heat generated when the LED device220in the LED module200emits light may be transferred to a printed circuit board (PCB)210of the LED module200, and the heat of the PCB210may be dissipated into the ground through the base surface110and the open internal space160of the body unit100.

The bottom surface150may be made of synthetic resin or a steel use stainless (SUS) material that does not corrode in moisture to transfer a cold temperature of the ground to the internal space160through the bottom surface150.

The internal space160may be formed between the bottom surface150disposed on the lower portion of the body unit100and the base surface110. The internal space160may be equipped with the cable C for supplying power and transmitting control signals to the LED module200.

The body unit100may have both end portions in a longitudinal direction formed with a first connection hole h1and a second connection hole h2, and the first and second connection holes h1and h2may be formed to be connected to the internal space160. In addition, the cable C may have one end portion provided with a first adapter CA1and the other end portion provided with a second adapter CA2, and a length between the first adapter CA1and the second adapter CA2may be provided to stretch and contract. Here, the first adapter CA1may be provided in a state of being drawn out outward through the first connection hole h1, and the second adapter CA2may be disposed in the internal space160of the body unit100.

Since one floor-type walking signal device1is about 30 cm in length, the plurality of floor-type walking signal devices1may be installed in a row in the longitudinal direction when installed in the ground. In this case, the cable C may be used to supply power and transmit the control signals between neighboring walking signal devices.

Although not specifically illustrated, when one walking signal device is connected to neighboring another walking signal device, the first adapter CA1provided on the cable C of the walking signal device may be inserted into the internal space160of the body unit100through the second connection hole h2of another walking signal device and connected to the second adapter CA2provided on the cable C of another walking signal device.

The first adapter CA1and the second adapter CA2may each include a pair of first terminals t1and a pair of second terminals t2. Here, the pair of first terminals t1may provide power (e.g., a constant voltage of DC 24 V) to the driving module400, and the pair of second terminals t2may be formed of an interface for RS-485 communication to transmit traffic light control signals between the driving module400and the signal controller2(seeFIG.1) on the ground. Here, the traffic light control signals are red ON/OFF, green ON/OFF, and green flashing signals. The driving module400may control the driving of each LED device220based on the traffic light control signals.

Meanwhile, a pair of cable glands170may be provided at both sides of the protective housing180disposed in the internal space160of the body unit100. The cable gland170may be provided to connect the cable C to the protective housing180, made of a stainless steel material, and provided with packing or sealing to have a waterproof function. The cable C may be connected to the driving module400through the protective housing180.

FIG.7is an enlarged perspective view illustrating a portion of an LED module200inFIG.3.

Referring toFIG.7, the LED module200may have a plurality of LED devices220for generating signaling light disposed on one surface of the PCB210in a matrix. In the embodiment of the present disclosure, an example in which the LED device220is provided as a pair of the red LED device221and the green LED device222, and the pair of LED devices221and222are disposed in a matrix of 12 rows and 6 columns (72 in total) at equal intervals is described, but the present disclosure is not limited thereto. As an example, the LED device220may be provided so that a single device selectively emits red and green light. In addition, the power consumption of the LED device220may be in a range of 4.5 to 5 W.

Conventionally, the diode rounded LED device220is mainly used, but since the LED device220according to the embodiment of the present disclosure is provided as a chip type, a directivity angle is relatively wider than that of the conventional device. Therefore, the floor-type walking signal device1according to the embodiment of the present disclosure may adjust an angle of light using the reflector300and increase luminance by focusing the light. Since the light generated from the surface of the LED device220is reflected by the reflective surface310of the reflector300, when viewed from the pedestrian's vision, not only the LED device220but also the reflective surface310may be viewed like a light source, thereby significantly expanding a light-emitting area. The reflector300may be made of a polycarbonate material, but is not limited thereto.FIG.8is a cross-sectional view along line A-A′ inFIG.2.

Referring toFIGS.3,4, and8, the body unit100may have the plurality of first insertion holes131formed at intervals along the circumference of the upper edge130, and the plurality of second insertion holes141may be formed at intervals along the circumference of the lower edge140.

The first insertion hole131and the second insertion hole141may be formed to be connected, and the first insertion hole131may be formed to have a smaller diameter than the second insertion hole141. In other words, a stepped surface f may be formed between the first insertion hole131and the second insertion hole141due to a difference in diameter.

The body unit100and the cover unit500may be coupled by a fastener such as a bolt. In the embodiment of the present disclosure, an example in which a bolt is used as a fastener will be described. A bolt B1may be fitted through the second insertion hole141of the body unit100to pass through the first insertion hole131and fastened to a nut hole N1aof the nut N1by passing through the fastening hole610of the gasket600and the bolt hole531formed on the lower portion of the side wall530of the cover unit500. Here, a head portion h of the bolt B1may be supported by the stepped surface f between the first insertion hole131and the second insertion hole141. A coupling structure using the bolt B1and the nut N1has an advantage of enabling robust connection and reducing the component manufacturing cost and the product manufacturing cost.

FIG.9is a cross-sectional view illustrating a first modified example in which a coupling structure of the body unit and the cover unit is different.

Referring toFIG.9, a nut N2is not fitted into the upper portion of the side wall530of the cover unit500and may be horizontally fitted into a nut fitting groove540formed in the side wall530as marked by the arrow. In this case, the nut N2may be located at a position at which a nut hole at the center corresponds to the first insertion hole131of the body unit100.

After the nut N2is fitted into the nut fitting groove540as described above, the bolt B2may be fitted through the second insertion hole141of the body unit100to pass through the first insertion hole131and fastened to the nut hole of the nut N2by passing through the fastening hole610of the gasket600and the bolt hole531of the cover unit500. In this case, a head portion h of the bolt B2may be supported by the stepped surface f between the first insertion hole131and the second insertion hole141.

As described above, a method of inserting the nut N2into the nut fitting groove540and fastening the nut N2with the bolt B2enables the robust coupling of the body unit100and the cover unit500as in the embodiment ofFIG.8.

FIG.10is a cross-sectional view illustrating a second modified example in which the coupling structure of the body unit and the cover unit is different.

Referring toFIG.10, a nut N3may be provided to be buried into the cover unit500when the cover unit500is injection-manufactured. The cover unit500may be manufactured by plastic injection-molding, and in this case, the nut N3may be provided to be buried into the side wall530of the cover unit500. As in the first modified example ofFIG.9, a bolt B3may be fitted through the second insertion hole141of the body unit100to pass through the first insertion hole131and fastened to the nut hole of the nut N3by passing through the fastening hole610of the gasket600and the bolt hole531of the cover unit500.

As described above, a method of fastening the bolt B3to the nut N3buried into the cover unit500has an advantage of enabling a more robust coupling between the body unit100and the cover unit500, but may have a slightly high manufacturing cost.

Referring toFIGS.8to10, the reflector300may be disposed on the upper portion of the LED module200and may include a plurality of reflective surfaces310corresponding to each of the plurality of LED devices220.

A lower surface330of the reflector300may be formed as an inclined surface corresponding to the base surface110of the body unit100. The lower surface330of the reflector300may be disposed to face the inclined base surface110of the body unit100. As described above, the lower surface330of the reflector300and the base surface110may be formed to have corresponding inclinations and disposed to face each other, and an upper surface of the reflector300may be disposed horizontally.

The light generated from each of the LED devices220may be reflected by the reflective surface310of the reflector300. In this case, the light is not emitted vertically, but may be emitted to the cover unit500at an angle inclined at about 10 degrees from verticality toward the sidewalk20.

Since the inclined angle is inclined toward the sidewalk20, which is a direction opposite to the direction of the road10as described above, the light emitted toward the road10may be greatly decreased, and more light may be emitted toward the sidewalk20. In other words, it is possible to increase the light directed to the pedestrians while minimizing the interference of the light directed to the driver of the vehicle. Therefore, it is possible to reduce the driver's driving interference and further improve the pedestrian's visibility.

FIG.11Ais a perspective view illustrating a plan side of a reflector in the floor-type walking signal device according to the embodiment of the present disclosure,FIG.11Bis a perspective view illustrating a lower surface side of the reflector in the floor-type walking signal device according to the embodiment of the present disclosure, andFIG.12is an enlarged cross-sectional view illustrating the reflector inFIG.8.

As illustrated inFIGS.11A and11B, the plurality of reflective surfaces310of the reflector300may be disposed in a matrix of 12 rows and 6 columns corresponding to the plurality of LED devices220disposed in a matrix of 12 rows and 6 columns.

Here, the plurality of reflective surfaces310are classified in a unit of column and separately defined as first to nth(n is a natural number) column reflective surface groups sequentially from a position close to one side to a position far from the one side. In the embodiment of the present disclosure, the plurality of reflective surfaces are separately defined as first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6in correspondence to the plurality of LED devices220disposed in a matrix of 12 rows and 6 columns. In this case, each of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6is formed to include 12 reflective surfaces310disposed adjacent to each other in a row direction, that is, the longitudinal direction of the reflector300. Specifically, the first column reflective surface group m1has a total of 12 reflective surfaces310disposed in a first column, which is the closest position to one side, and the sixth column reflective surface group m6has a total of 12 reflective surfaces310disposed in a 6th column, which is the farthest position from the one side. In addition, the second to fifth column reflective surface groups m2, m3, m4, and m5have a total of 12 reflective surfaces310disposed in each column.

As illustrated inFIG.12, each of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may include a first wall surface311and a second wall surface312disposed at an interval in a width direction of the reflector300. Here, a first virtual line S1extending downward from the first wall surface311and a second virtual line S2extending downward from the second wall surface312form a virtual angle θ at an intersection point.

For example, the first and second virtual lines S1and S2of the first column reflective surface group m1form a first virtual angle θ1at the intersection point, the first and second virtual lines S1and S2of the second column reflective surface group m2form a second virtual angle θ2, and the first and second virtual lines S1and S2of each of the remaining third to sixth column reflective surface groups m3, m4, m5, and m6form third to sixth virtual angles θ3,04,05, and06at their intersection points.

In this case, at least two of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may have different virtual angles, and as the column reflective surface group is closer to one side, the virtual angle may be formed to be smaller. Preferably, the first to sixth virtual angles θ1, θ2, θ3, θ4, θ5, and θ6of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be formed differently, and as the column reflective surface group is closer to one side, the virtual angle may be formed to be smaller.

The lower surface330of the reflector300is formed as an inclined surface corresponding to the inclined base surface110of the body unit100, and the upper surface320of the reflector300is disposed horizontally. Therefore, lengths of the first and second wall surfaces311and312of the second column reflective surface group m2are formed to be shorter than those of the first column reflective surface group m1, and the lengths of the first and second wall surfaces311and312gradually become shorter toward the sixth reflective surface group m6. In other words, a distance between the upper surface320of the reflector300, which is a light-emitting surface, and the lower surface330of the reflector300, which is in contact with the LED module200, gradually becomes shorter from the first column reflective surface group m1to the sixth column reflective surface group m6.

Among the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6, the sixth column reflective surface group m6appears brightest because the distance between the light-emitting surface and the LED device220is the shortest, and the first column reflective surface group m1appears relatively less bright because the distance between the light-emitting surface and the LED device220is longer than the sixth column reflective surface group m6.

Therefore, the floor-type walking signal device1according to the embodiment of the present disclosure may be formed so that the first to sixth virtual angles θ1, θ2, θ3, θ4, θ5, and θ6of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be formed to have the relationship “θ1<θ2<θ3<θ4<θ5<θ6.” In other words, since the first virtual angle θ1of the first column reflective surface group m1is formed to be smaller than the sixth virtual angle θ6of the sixth column reflective surface group m6, light may be emitted in a denser state even when the distance between the light-emitting surface and the LED device220is formed to be longer.

The open upper end portions321of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be all formed to have the same area, and the open lower end portions331of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be all formed to have the same area.

In addition, the open upper end portions321of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be all formed to have the same width, and the open lower end portions331of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be all formed to have the same width.

In the floor-type walking signal device1, there is a problem in that since the LED module200is installed on the inclined base surface110and disposed to be tilted at a standardized angle, the distance between the light-emitting surface and the LED device220is different, thereby making the luminance uneven.

In order to solve this, when the open upper end portions321of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6are all formed to have the same area or width and the open lower end portions331of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6are all formed to have the same area or width, as the lengths of the first wall surface311and the second wall surface312are increased, the virtual angle may become smaller. In other words, since the lengths of the first wall surface311and the second wall surface312are further increased from the sixth column reflective surface group m6close to the road10to the first column reflective surface group m1relatively closer to the sidewalk20, the virtual angle may become smaller. In other words, since the virtual angles are formed to gradually become smaller to have the relationship of “θ1<θ2<θ3<θ4<θ5<θ6” from the sixth column reflective surface group m6to the first column reflective surface group m1, the light may be emitted in a denser state toward the first column reflective surface group m1. As described above, even when the distance between the light-emitting surface and the LED device220, that is, an optical path, is relatively longer, the luminance is not reduced, and thus it is possible to improve the luminance uniformity on the light-emitting surface.

In addition, the open upper end portions321of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be all formed to have greater areas than the open lower end portions331of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6. In addition, the open upper end portions321of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be formed to have greater widths than the open lower end portions331of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6.

FIG.13is a cross-sectional view illustrating another modified example in which a reflective surface inFIG.12is different.

Referring toFIG.13, a first wall surface311′ and a second wall surface312′ of each of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6may be formed to be inclined in a direction that moves away upward with respect to a vertical line L passing through the open upper end portions and lower end portions of each of the first to sixth column reflective surface groups m1, m2, m3, m4, m5, and m6.

A reflector300′ is manufactured by injection-molding, and when the first wall surface311′ and the second wall surface312′ are formed to be inclined in a direction closer upward with respect to the vertical line L, it is difficult to easily remove a molded component (not illustrated) from the upper side when the molded component inserted to form the first and second wall surfaces311′ and312′ tries to be removed after the reflector300′ is molded. On the other hand, when the first wall surface311′ and the second wall surface312′ are formed to be inclined in a direction that moves away upward with respect to the vertical line L, the molded component may be easily removed from the upper side.

According to the floor-type walking signal device according to the embodiment of the present disclosure, it is possible to improve the luminance uniformity on the light-emitting surface because the luminance is not decreased even when the distance between the light-emitting surface and the LED device, that is, the optical path is relatively longer.

In addition, according to the floor-type walking signal device according to the embodiment of the present disclosure, when repair or replacement is required in a state in which the floor-type walking signal device is installed by being buried in the ground, it is possible to easily repair or replace the reflector, the LED module, and the like by releasing the bolt or the like and separating the cover unit, thereby facilitating maintenance.

The best embodiments of the present disclosure have been disclosed in the drawings and the specification. Here, although specific terms are used, they are used only for the purpose of describing the present disclosure and are not used to limit the meaning or scope of the present disclosure described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent embodiments are possible from the present disclosure. Therefore, the true technical scope of the present disclosure should be determined by the technical spirit of the appended claims.