Center total reflection type road sign stud

Abstract

To provide a center total reflection type road sign stud which can provide optimum visibility to a driver or a pedestrian by totally reflecting the stud though a lens without causing even a partial loss of light which is diverged from the inside of the road sign stud.SOLUTION: A total internal reflection-type road sign stud includes: a lower case in which an installation space is formed; a circuit baseboard arranged in the installation space; an LED module attached to a center part of the circuit baseboard, and diverging light upward; an inner lens arranged above the LED module, and totally reflecting light emitted from the LED module to both-side directions; an outer lens composed of a transparent material, arranged above the circuit baseboard and the inner lens, and having light permeation parts through which the light totally reflected from the inner loosen permeates formed at upper-face both sides; and a cover member for covering an upper part of the outer lens, and fixedly connecting the outer lens and the lower case.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a center total reflection type road sign stud, and more particularly to a center total reflection type road sign stud that is installed on a road and can be clearly seen by pedestrians and drivers at night or in rainy weather. [Background technology]

[0002] A road sign is an accessory to a road, as defined in Article 3 of the Road Act and Article 30 of the Regulations on Road Structure / Facility Standards. It complements the linear shape of painted road markings, which have serious reduced visibility at night or during rainy weather, clearly guides the driver's gaze, and is a visual guidance facility intended to ensure road safety and smooth communication.

[0003] These road sign studs are installed in sections that complement the functions of road markings such as centerlines, lane boundaries, reserved lanes, road hazards and safety zones, and that need to increase drivers' awareness of linear guidance and changes in the road environment.

[0004] Typical installation areas include roadside lines, curved roads, tunnels, sections where lanes decrease / separate / merge, sections where traffic lanes change, traffic islands, interchanges, two-lane roads with left-turn lanes, multi-lane roads, and bridges with narrow road widths.

[0005] In addition, road sign studs are classified according to their drive system into reflective types that reflect light entering from the outside like a car's headlights, and luminous types that have their own light-emitting function, and the luminous types are further subdivided into light-up types, convertible types, etc.

[0006] Reflective road sign studs do not have a self-illuminating function, but instead perform the function by reflecting the headlights of automobiles.

[0007] Therefore, while they are relatively inexpensive and easy to install, in order to realize a reflective surface at a specified angle, they must be installed so that they protrude a certain amount from the road surface, which reduces the stability and drivability of the road and causes problems such as a shortened lifespan due to wear of the reflective surface, so the use of luminous road sign studs is tending to increase.

[0008] Meanwhile, Korean Patent Publication No. 10-2200549 discloses a road sign stud that improves visibility by concentrating the light emitted from the road sign stud on a specific area.

[0009] However, such conventional road sign studs use reflectors, and as the light is reflected by the reflectors, some of the light is lost, limiting the improvement of visibility provided to drivers and pedestrians. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Korean Patent No. 10-2200549 [Patent Document 2] Korean Patent Publication No. 10-2022-0121164 [Patent Document 3] Korean Patent No. 10-2354817 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention is intended to solve the above-mentioned problems, and aims to provide a central total reflection type road sign stud that can provide optimal visibility to drivers and pedestrians by totally reflecting the light emitted from inside the road sign stud through the lens without losing any of it. [Means for solving the problem]

[0012] In order to achieve the above object, the central total reflection type road sign stud of the present invention comprises a lower case having an installation space formed therein; A circuit board disposed in the installation space; an LED module mounted in the center of the circuit board and emitting light in an upward direction; an inner lens disposed on the upper portion of the LED module and totally reflecting the light emitted from the LED module in both directions; an outer lens made of a transparent material, disposed on the circuit board and the inner lens, the outer lens having light transmission portions formed on both sides of the upper surface thereof through which light totally reflected from the inner lens is transmitted; a cover member for covering an upper portion of the outer lens and fixing the outer lens to a lower case; The light emitted upward from the LED module is totally reflected in both directions while passing through the inner lens arranged at the top, moves to the outer lens, and is then emitted to the outside while passing through the light transmitting part of the outer lens.

[0013] The inner lens has a first total reflection surface formed around the lower periphery and a second total reflection surface formed on both sides of the upper part, a mounting groove recessed upward at the lower part of the inner lens, and the LED module is disposed at the lower part of the mounting groove. Of the light emitted from the LED module, light that is emitted in a lateral direction of the mounting groove passes through the inside of the inner lens and is totally reflected by the first total reflection surface and moves along the inside of the inner lens to the second total reflection surface, light that is emitted to the upper part of the mounting groove is refracted at the upper surface of the mounting groove and passes through the inside of the inner lens to the second total reflection surface, and the light that reaches the second total reflection surface is totally reflected in the lateral direction by the second total reflection surface and moves toward the light transmitting portion of the outer lens.

[0014] The inner lens includes an upper inner lens portion having the second total reflection surfaces formed on both sides of an upper portion of the inner lens portion; a lower inner lens portion having a dome shape and integrally formed with a lower portion of the upper inner lens portion so as to protrude downward, the periphery of the dome shape forming the first total reflection surface; The second total reflection surface has a "V" shape with a concave center portion facing downward, and both inclined side surfaces are disposed toward the light transmission portion, and the mounting groove is formed by recessing upward from the bottom surface of the lower inner lens portion.

[0015] A dome-shaped protrusion is formed downward at an upper inner part of the mounting groove, and light emitted from the LED module to the upper part of the mounting groove is refracted at the protrusion formed at the upper inner part of the mounting groove, and then passes through the inside of the inner lens and moves to the second total reflection surface.

[0016] The inner lens further includes a support protruding downward from the lower inner lens portion, the support being coupled to the circuit board and supporting the lower inner lens portion in a spaced-apart relation from the circuit board.

[0017] A seat is formed at the center of the lower surface of the outer lens, and an upper portion of the upper inner lens portion is inserted into the seat.

[0018] The mounting portion is formed in an "M" shape so that the second total reflection surface formed in a "V" shape can be inserted and disposed, and both sides of the upper inner lens portion are inserted and disposed facing both sides of the mounting portion. Effect of the Invention

[0019] The central total reflection type road sign stud of the present invention as described above has the following effects.

[0020] In the present invention, the light emitted from the LED module is totally reflected through the inner lens and transferred to the outer lens, thereby preventing some of the light from being lost in the process of being reflected by the reflector as in conventional technology. As a result, more light is emitted from the LED module and more strongly to the outside, providing optimal visibility to drivers and pedestrians. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a road sign stud according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of a road sign stud according to an embodiment of the present invention. [Diagram 3] FIG. 3 is another exploded perspective view of the road sign stud according to the embodiment of the present invention. [Figure 4] FIG. 4 is a perspective view of an inner lens of a road sign stud according to an embodiment of the present invention. [Diagram 5] FIG. 5 is a cross-sectional view taken along line AA in FIG. [Figure 6] FIG. 6 illustrates the path of light diverging from a road sign stud through an inner lens and an outer lens according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] As shown in Figures 1 to 5, the central total reflection type road sign stud of the present invention comprises a lower case (10), a circuit board (20), an LED module (30), an inner lens (40), an outer lens (50), a cover member (60), etc.

[0023] The lower case (10) has an installation space formed therein.

[0024] The circuit board (20) is disposed in the installation space.

[0025] The circuit board (20) can be connected to an external power source via a cable, and can also be connected to a solar panel (25).

[0026] In the drawing of this embodiment, a solar panel (25) is disposed on top of the circuit board (20).

[0027] The LED module (30) is mounted on the central upper surface of the circuit board (20) and emits light upward.

[0028] The light emitted from the LED module (30) is horizontally emitted to the outside through the inner lens (40) and the outer lens (50).

[0029] The inner lens (40) is made of a transparent material and is disposed on the upper part of the LED module (30) to totally reflect the light emitted from the LED module (30) in both directions.

[0030] The outer lens (50) is made of a transparent material and is disposed on the circuit board (20) and the inner lens (40).

[0031] The outer lens (50) has light transmitting portions (51) formed on both sides of its upper surface, through which the light totally reflected from the inner lens (40) passes.

[0032] A refractive surface etched in multiple steps is formed on the upper surface of the light-transmitting portion (51), so that light passing through the inside of the outer lens (50) is refracted as it passes through the light-transmitting portion (51) and dispersed in the horizontal direction.

[0033] The cover member (60) covers an upper portion of the outer lens (50) and fixes and couples the outer lens (50) to the lower case (10).

[0034] In the present invention, the light emitted upward from the LED module (30) is totally reflected in both directions while passing through the inner lens (40) arranged at the top, moves to the outer lens (50), and then is emitted to the outside while passing through the light transmitting portion (51) of the outer lens (50).

[0035] To achieve this, as shown in Figs. 4 and 5, the inner lens (40) has a first total reflection surface (41) formed around the lower periphery and second total reflection surfaces (42) formed on both sides of the upper portion.

[0036] More specifically, the inner lens (40) comprises an upper inner lens portion (43) and a lower inner lens portion (44).

[0037] The upper inner lens portion (43) has the second total reflection surfaces (42) formed on both sides of the upper portion.

[0038] In this embodiment, the upper inner lens portion (43) is formed long in a direction perpendicular to the pair of light-transmitting portions (51), and a downwardly recessed "V"-shaped groove is formed long in the longitudinal direction of the upper inner lens portion (43) at the center of the upper portion.

[0039] At this time, the "V" shaped groove forms the second total reflection surface (42).

[0040] That is, the second total reflection surface (42) has a “V” shape with the center concave downward, and both inclined side surfaces of the second total reflection surface (42) are positioned toward the light-transmitting portion (51) of the outer lens (50).

[0041] The lower inner lens portion (44) is dome-shaped and is integrally formed with the lower portion of the upper inner lens portion (43) while protruding downward.

[0042] A dome-shaped peripheral surface of the lower inner lens portion (44) forms the first total reflection surface (41).

[0043] The inner lens (40) has a lower portion recessed upward to form a mounting groove (44a).

[0044] Specifically, the mounting groove (44a) is formed by recessing upward from the bottom surface of the lower inner lens portion (44).

[0045] The LED module (30) is disposed below the mounting groove (44a).

[0046] A dome-shaped protrusion (44b) is formed downward at the upper inner portion of the mounting groove (44a).

[0047] The inner lens (40) further includes a support (45) protruding downward from the lower inner lens portion (44).

[0048] The support base (45) is coupled to the circuit board (20) and supports the lower inner lens portion (44) in a state spaced apart from the circuit board (20).

[0049] The outer lens (50) disposed on the upper portion of the inner lens (40) has a seat (52) formed at the center of the lower surface thereof.

[0050] The upper portion of the upper inner lens portion (43) is inserted into the seat portion (52).

[0051] At this time, the upper part of the upper inner lens portion (43) is supported in contact with the mounting portion (52) so that the upper inner lens portion (43) supports the center of the outer lens (50), and at the same time, the upper inner lens portion (43) mounted on the mounting portion (52) can prevent shaking, etc. by contacting the outer lens (50).

[0052] In addition, since the upper inner lens portion (43) is assembled so as to be inserted into the seat portion (52), the convenience of assembly can be improved.

[0053] The seating portion (52) is shaped like an "M" so that the second total reflection surface (42) shaped like a "V" can be inserted therein.

[0054] That is, the mounting portion (52) is formed as an "M" shaped groove on the central underside of the outer lens (50), and the second total reflection surface (42) formed as a "V" shape is inserted into the mounting portion (52) formed as the "M" shaped groove.

[0055] Due to this shape and structure, the upper inner lens part (43) seated on the seat part (52) can be further prevented from shaking while contacting the outer lens (50).

[0056] At this time, both side surfaces of the upper inner lens portion (43) disposed on both sides of the second total reflection surface (42) are inserted and disposed so as to face both side surfaces of the seating portion (52).

[0057] Due to the above-mentioned structure and shape, as shown in FIG. 6, when light is emitted upward from the LED module (30), the emitted light is totally reflected while passing through the inner lens (40) arranged at the top and moves to the outer lens (50), and then passes through the light transmitting portion (51) of the outer lens (50) and is emitted to the outside.

[0058] More specifically, of the light emitted from the LED module (30), the light that is emitted in the lateral direction of the mounting groove (44a) passes through the inside of the inner lens (40) and then reaches the first total reflection surface (41) formed around the dome-shaped lower inner lens portion (44).

[0059] The light reaching the first total reflection surface (41) is totally reflected upwards according to a pre-designed angle of incidence of the light and a critical angle of the first total reflection surface.

[0060] The light totally reflected upward by the first total reflection surface (41) passes through the inside of the inner lens (40) and then reaches the second total reflection surface (42) arranged at the top.

[0061] The light reaching the second total reflection surface (42) is totally reflected at a slight incline in the lateral direction according to a pre-designed incident angle of the light and a critical angle of the second total reflection surface (42).

[0062] The light that is totally reflected from the second total reflection surface (42) at a slight incline in the lateral direction passes through the inner lens (40), then passes through the outer lens (50) to reach the light-transmitting portion (51), where it is refracted and finally dispersed in the horizontal direction to the outside.

[0063] Of the light emitted from the LED module (30), the light that is emitted to the upper part of the mounting groove (44a) is refracted upward by the protrusion (44b) formed on the upper inner part of the mounting groove (44a), and then passes through the inner lens (40) and moves to the second total reflection surface (42) located at the upper part.

[0064] At this time, the light refracted by the protrusion (44b) and moving upward and the light totally reflected by the first total reflection surface (41) and moving upward are incident on the second total reflection surface (42) in a parallel state to each other.

[0065] The light reaching the second total reflection surface (42) is totally reflected so as to be slightly inclined in the lateral direction due to the pre-designed incident angle of the light and the critical angle of the second total reflection surface (42).

[0066] The light that is totally reflected at a slight incline to the side by the second total reflection surface (42) passes through the inner lens (40), then passes through the outer lens (50) to reach the light-transmitting portion (51), where it is refracted and finally dispersed in the horizontal direction to the outside.

[0067] As described above, the present invention causes the light emitted from the LED module (30) to be totally reflected through the inner lens (40) and then transferred to the outer lens (50), thereby preventing some of the light from being lost in the process of being reflected by the reflector as occurs in conventional technology. As a result, more light is emitted from the LED module (30) and more strongly to the outside, providing optimal visibility to drivers and pedestrians.

[0068] The central total reflection type road sign stud of the present invention is not limited to the above-mentioned embodiment, and can be modified in various ways within the scope of the technical concept of the present invention. [Explanation of symbols]

[0069] 10 Lower Case 20 Circuit Board 25 Solar Panels 30 LED Modules 40 Inner Lens 41 1st total reflection surface 42 Second total reflection surface 43 Upper inner lens part 44 Lower inner lens part 44a Mounting groove 44b Protrusion 45 Support stand 50 Outer Lens 51 Light transmission part 52 Landing Section 60 Cover member

Claims

[Claim 1] A lower case having an installation space formed therein; A circuit board disposed in the installation space; an LED module mounted in the center of the circuit board and emitting light in an upward direction; an inner lens disposed on the upper portion of the LED module and totally reflecting the light emitted from the LED module in both directions; an outer lens made of a transparent material, disposed on the circuit board and the inner lens, the outer lens having light transmitting portions formed on both sides of the upper surface thereof through which light totally reflected from the inner lens passes; a cover member that covers an upper portion of the outer lens and fixes and couples the outer lens to the lower case; Equipped with The light emitted upward from the LED module is totally reflected in both directions while passing through the inner lens arranged at the upper part, moves to the outer lens, and then diverges to the outside while passing through the light transmitting part of the outer lens. The inner lens has a first totally reflective surface formed around the lower periphery and a second totally reflective surface formed on both sides of the upper part. A mounting groove is formed in a lower portion of the inner lens by being recessed upward, the LED module is disposed in a lower portion of the mounting groove, and among the light emitted from the LED module, the light diverged in a lateral direction of the mounting groove is transmitted through the inside of the inner lens and then moves along the inside of the inner lens to the second total reflection surface while being totally reflected by the first total reflection surface, the light diverged to the upper portion of the mounting groove is refracted at an upper surface of the mounting groove and then passes through the inside of the inner lens and moves to the second total reflection surface, and the light that has reached the second total reflection surface is totally reflected in a lateral direction by the second total reflection surface while moving toward the light transmitting portion of the outer lens, The inner lens is an upper inner lens part having the second total reflection surfaces formed on both sides of the upper part; a lower inner lens portion having a dome shape, integrally formed with a lower portion of the upper inner lens portion in a manner to protrude downward, the periphery of the dome shape forming the first total reflection surface; Equipped with the second total reflection surface has a "V" shape with a concave center portion facing downward, and both inclined side surfaces are disposed toward the light transmitting portion; the mounting groove is formed by recessing upward from the bottom surface of the lower inner lens portion, and a dome-shaped protrusion is formed downward at an upper interior portion of the mounting groove; and among the light emitted from the LED module, the light emitted to the upper portion of the mounting groove is refracted by the protrusion formed at the upper interior portion of the mounting groove and then passes through the inner lens to move to the second total reflection surface.

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