KR100818249B1 - A traffic signal structure of a parts separation - Google Patents

A traffic signal structure of a parts separation Download PDF

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Publication number
KR100818249B1
KR100818249B1 KR1020070004805A KR20070004805A KR100818249B1 KR 100818249 B1 KR100818249 B1 KR 100818249B1 KR 1020070004805 A KR1020070004805 A KR 1020070004805A KR 20070004805 A KR20070004805 A KR 20070004805A KR 100818249 B1 KR100818249 B1 KR 100818249B1
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South Korea
Prior art keywords
back cover
flange
front plate
led module
fastening
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KR1020070004805A
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Korean (ko)
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정진태
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진우산전 주식회사
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/09Arrangements for giving variable traffic instructions
    • G08G1/095Traffic lights
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Traffic Control Systems (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

A detachable traffic signal structure is provided to enhance management convenience by detaching the parts from the detachable traffic signal structure when the exchange of the parts is required. A detachable traffic signal structure includes an external case, a front plate(2), a back cover(3), a lens cover, and an LED(Light Emitting Diode) module(5). Plural mounting areas which have first coupling grooves(12a) for mounting a flange(6) including the LED module are formed in the back cover. Second coupling grooves are formed at an edge of the flange. The back cover includes a coupling flange which has third coupling grooves(13a) at edge thereof, to be coupled with the front plate through the screwing of connecting members. A power supply connected to the LED module is formed in the back cover and connected with a power connection part. The lens cover is coupled with the front plate using a packing member(15) to block the penetration of substances into inner space.

Description

부품 분리형의 신호등 구조{A traffic signal structure of a parts separation}A traffic signal structure of a parts separation}

도 1은 본 발명의 실시예로 다단으로 이루어진 LED신호등 구조의 전체 사시도.1 is an overall perspective view of an LED traffic light structure consisting of multiple stages in an embodiment of the present invention.

도 2는 본 발명의 실시예로 도 1에 대한 부분 단면도.2 is a partial cross-sectional view of FIG. 1 as an embodiment of the invention.

도 3은 본 발명의 다른실시예로 도 1에 대한 부분 단면도.3 is a partial cross-sectional view of FIG. 1 as another embodiment of the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1 ; 외부케이스 1a,2a; 록킹체결부One ; Outer cases 1a and 2a; Locking fastening part

2 ; 전면판 3 ; 백커버2 ; Front panel 3; Back cover

4 ; 렌즈커버 5 ; LED모듈4 ; Lens cover 5; LED module

6 ; 플랜지 6a; 제 2 체결홀6; Flange 6a; 2nd fastening hole

12,12'; 안착면 12a,12a'; 제 1 체결홀12,12 '; Seating surfaces 12a, 12a '; 1st fastening hole

13; 결합플랜지 13a; 제 3 체결홀13; Coupling flange 13a; 3rd fastening hole

15; 패킹부 20; 전원공급부15; A packing part 20; Power supply

100; 체결부재100; Fastening member

본 발명은 도로용 보행신호나 교통신호 혹은 철도 건널목 등에서 통행여부의 신호를 주는데 사용하는 LED신호등에 관한 것으로서, 보다 상세하게는 LED신호등의 외부케이스에 LED신호등의 부품(예; 백커버, 렌즈, LED모듈이 형성된 플랜지)들을 조립시킨 후 필요로 따라 부품들을 분리하여 부분적인 유지 보수가 이루어지도록 하는 부품 분리형의 신호등 구조에 관한 것이다.The present invention relates to an LED signal lamp used to give a signal of whether or not a traffic signal, such as a road pedestrian or traffic signal or railroad crossing, and more particularly, the parts of the LED signal lamp (eg, back cover, lens, After assembling the flanges formed with the LED module) and to separate the parts as necessary to maintain the partial separation type of traffic light structure.

일반적으로, LED신호등은 도시하지 않았지만, 외부케이스에 전면판이 개폐회전이 이루어지도록 결합되고, 상기 전면판에는 LED신호등의 부품들로서 백커버와 렌즈 및 LED모듈이 형성된 플랜지가 볼트 등의 체결수단을 통해 결합되는 구조로 이루어져 있다.In general, although the LED traffic light is not shown, the front plate is coupled to the outer case so as to open and close rotation, and the front plate is a flange of the back cover and the lens and the LED module as the parts of the LED signal light through the fastening means such as bolts. It consists of a structure that is combined.

아울러, 상기 외부케이스로 전면판의 닫힘 회전이 이루어질 때, 그 닫힘상태가 고정되도록 상기 외부케이스와 전면판의 일측부위에는 각각 록킹수단(예; 볼트, 핀 등)이 체결되는 록킹체결부가 형성되어 있다.In addition, when a closed rotation of the front plate is made by the outer case, locking portions (eg, bolts, pins, etc.) are formed at one side of the outer case and the front plate so that the closed state is fixed. have.

그러나, 상기와 같은 종래의 LED신호등은 외부케이스에 전면판의 개폐 회전이 가능하게 결합되는 일체형의 구조인 관계로, 상기 전면판에 볼트 등으로 결합된 부품들의 고장이 발생하거나 교환 주기가 되었을 때 그 부품에 대한 부분적인 유지 보수가 상당히 어려웠다.However, the conventional LED signal lamp as described above is an integral structure in which the front panel is openly and rotatably coupled to the outer case, and when a failure or replacement cycle of components coupled to the front panel with a bolt or the like occurs, Partial maintenance of the parts was quite difficult.

즉, 상기 전면판에 볼트 등으로 결합된 부품을 교환하기 위해서는 LED신호등의 외부케이스를 설치 장소로부터 완전 분리하거나, 또는 별도의 장비(예; 사다리 차)를 통해 작업자가 현장에서 직접 전면판을 개폐시킨 후 그 전면판에 결합된 볼트를 해제시켜 부품을 교환해야 하는 등 그 유지 보수에 상당한 어려움이 따랐다.That is, in order to replace the parts coupled to the front panel with bolts, the external case of the LED signal lamp is completely separated from the installation site, or the operator directly opens or closes the front panel at the site through a separate equipment (eg, a ladder car). There was considerable difficulty in maintenance, such as the need to replace the parts by releasing the bolts attached to the faceplate.

이에 본원출원인은 2004년 05월 17일자로 출원하여 등록된 등록특허 제 637311 호(출원번호 10-2004-34776)를 통해, 상기의 종래 문제점을 개선하였으며, 본 발명은 상기의 등록특허에 대한 개량 특허를 개시한 것이다.Accordingly, the applicant of the present application improves the above-mentioned conventional problems through the registered patent No. 637311 (Application No. 10-2004-34776), filed on May 17, 2004, and the present invention improves on the registered patent. A patent is disclosed.

즉, 본 발명은 LED신호등의 외부케이스에 백커버, 렌즈커버, LED모듈이 형성된 플랜지와 같은 LED신호등의 부품을 순차적으로 조립 구성하여, LED신호등 부품 중 어느 하나가 파손되거나 기타 교환주기가 되었을 때 그 부품만을 분리시킬 수 있도록 하는 등 관리상의 편의성을 향상시키고, 아울러 LED모듈이 수납되는 공간을 제공하는 백커버와 렌즈커버의 결합부위에 대한 밀폐 성능을 향상시킬 수 있도록 하는 부품 분리형의 신호등 구조를 제공하려는데 그 목적이 있다.That is, the present invention sequentially assembled parts of the LED signal lamp, such as the back cover, the lens cover, the flange formed with the LED module in the outer case of the LED signal lamp, when any one of the LED signal lamp components are damaged or other replacement cycle It is possible to improve the convenience of management such that only the parts can be separated, and to separate the traffic light structure of the parts separation type to improve the sealing performance of the coupling part between the back cover and the lens cover, which provides a space for storing the LED module. The purpose is to provide.

이하, 첨부된 도면에 의거하여 본 발명의 바람직한 일실시예를 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

도 1은 본 발명의 실시예로 다단으로 이루어진 LED신호등 구조의 전체 사시도이며, 도 2는 본 발명의 실시예로 도 1에 대한 부분 단면도를 도시한 것이다.1 is an overall perspective view of a multi-stage LED traffic light structure according to an embodiment of the present invention, Figure 2 is a partial cross-sectional view of Figure 1 as an embodiment of the present invention.

도 1 및 도 2를 참조하면, 록킹체결부(1a)(2a)를 가진 외부케이스(1)와 전면판(2), 백커버(3), 렌즈커버(4), LED모듈(5)이 형성된 플랜지(6)를 포함하는 LED신호등 구조에 있어서,1 and 2, the outer case 1 having the locking fastening portions 1a and 2a, the front plate 2, the back cover 3, the lens cover 4, and the LED module 5 are In the LED traffic light structure comprising the formed flange (6),

상기 백커버(3)의 내부에는 LED모듈(5)이 형성된 플랜지(6)가 안착되도록 제 1 체결홀(12a)(12a')이 각각 형성된 복수의 안착면(12)(12')을 단차지게 구성하고,The plurality of seating surfaces 12 and 12 'having first fastening holes 12a and 12a' are respectively formed to seat the flange 6 on which the LED module 5 is formed in the back cover 3. Fork,

상기 플랜지(6)의 가장자리면에는 상기 제 1 체결홀(12a 또는 12a')에 대응되는 제 2 체결홀(6a)을 구성하며,An edge surface of the flange 6 constitutes a second fastening hole 6a corresponding to the first fastening hole 12a or 12a '.

상기 백커버(3)는 체결부재(100)의 조임력으로 상기 전면판(2)과 결합되도록 그 가장자리면에 제 3 체결홀(13a)이 다수 형성된 결합플랜지(13)를 구성한 상태에서, 상기 렌즈커버(4)는 상기 전면판(2)으로 끼움 결합되도록 구성하는 것을 특징으로 한다.In the state where the back cover 3 constitutes a coupling flange 13 in which a plurality of third fastening holes 13a are formed at an edge thereof to be coupled to the front plate 2 by the fastening force of the fastening member 100, the lens Cover 4 is characterized in that configured to be fitted into the front plate (2).

다른 일면에 따라, 상기 전면판(2)으로의 렌즈커버(4) 끼움 결합은 LED모듈(5)이 위치하는 백커버(3)의 내부로 이물질 유입을 차단하도록 끼움홈부(미도시)를 가진 고무재의 패킹부(15)를 통해 이루어지도록 하고, 상기 패킹부(15)는 상기 전면판(2)의 개구부측에 구성하는 것을 특징으로 한다.According to another aspect, the fitting coupling of the lens cover 4 to the front plate 2 has a fitting groove (not shown) to block foreign material from entering into the back cover 3 where the LED module 5 is located. It is made through the packing portion 15 of the rubber material, the packing portion 15 is characterized in that configured on the opening side of the front plate (2).

또 다른 일면에 따라, 상기 백커버(3)의 내부에는 LED모듈(5)에 연결되는 전원공급부(20)를 구성하고, 상기 전원공급부(20)는 외부케이스(1)로 안내되는 전원공급선로(미도시)에 배선되는 전원커넥터부(미도시)와 연결 구성하는 것을 특징으로 한다.According to another aspect, the back cover (3) constitutes a power supply unit (20) connected to the LED module (5), the power supply unit 20 is a power supply line guided to the outer case (1) It is characterized in that the connection configuration with the power connector (not shown) wired to (not shown).

이와같이 구성된 본 발명의 일실시예에 대한 작용을 첨부된 도 1 및 도 2를 참조하여 설명하면 다음과 같다.Referring to Figures 1 and 2 attached to the operation of an embodiment of the present invention configured as described above are as follows.

먼저, 도 1 및 도 2에서와 같이 외부케이스(1)에 전면판(2)을 회전 가능하게 결합시킨 후, 상기 외부케이스(1)를 다단으로 결합시킨다.First, as shown in FIGS. 1 and 2, the front plate 2 is rotatably coupled to the outer case 1, and then the outer case 1 is coupled in multiple stages.

이후, 상기 전면판(2)을 개방 회전시킨 상태에서, LED신호등의 부품인 백커버(3)의 내부에 전원공급부(20)를 안착시킨 후, 상기 전원공급부(20)는 외부케이스(1)로 안내되는 전원공급선로의 전원커넥터부에 연결시킨다.Subsequently, in a state in which the front plate 2 is rotated in an open state, the power supply unit 20 is seated inside the back cover 3 that is a component such as an LED signal lamp, and then the power supply unit 20 is the outer case 1. Connect to the power connector of the power supply line guided by.

다음으로, 상기 백커버(3)의 개구부측에 위치하는 안착면(12)에 LED모듈(5)이 구성된 플랜지(6)를 안착한 후, 상기 플랜지(6)의 LED모듈(5)을 상기 전원공급부(20)와 배선한다.Next, the flange 6 having the LED module 5 is seated on the seating surface 12 positioned at the opening side of the back cover 3, and then the LED module 5 of the flange 6 is connected to the power supply. Wiring with the supply part 20 is carried out.

다음으로, 상기 안착면(12)에 다수 형성된 제 1 체결홀(12a)에, 상기 플랜지(6)의 가장자리면에 형성된 제 2 체결홀(6a)을 일치시킨 후, 상기 일치된 제 1,2 체결홀(12a)(6a)에 나사 또는 스크류로 구성되는 체결부재(100)를 체결하면, 상기 백커버(3)와 LED모듈(5)이 구성된 플랜지(6)는 상기 체결부재(100)의 조임력에 의해 그 결합상태가 견고하게 유지된다.Next, after matching the first fastening hole 12a formed in the seating surface 12 with the second fastening hole 6a formed in the edge surface of the flange 6, the matched first and second ones When the fastening member 100 consisting of a screw or a screw is fastened to the fastening holes 12a and 6a, the flange 6 including the back cover 3 and the LED module 5 is formed on the fastening member 100. The fastening force keeps the engagement tight.

다음으로, 전면판(2)의 개구부측에 끼움홈부를 가진 패킹부(15)를 결합시키는 한편, 상기 패킹부(15)의 끼움홈부에 렌즈커버(4)의 가장자리면을 끼워, 상기 전면판(2)으로 렌즈커버(4)에 대한 결합을 완료한다.Next, while joining the packing portion 15 having the fitting groove on the opening side of the front plate 2, the edge surface of the lens cover 4 is fitted to the fitting groove of the packing portion 15, the front plate (2) to complete the coupling to the lens cover (4).

이후, 상기 백커버(3)의 결합플랜지(13)를 상기 전면판(2)의 일면으로 밀착한 후, 상기 결합플랜지(13)에 마련된 제 3 체결홀(13a)을 통해 체결부재(100)를 체결하여 조이면, 상기 체결부재(100)는 전면판(2)의 일면에서 체결이 이루어지고, 이에따라 상기 전면판(2)과 백커버(3)의 결합이 완료된다.Thereafter, the coupling flange 13 of the back cover 3 is brought into close contact with one surface of the front plate 2, and then the coupling member 100 is provided through the third coupling hole 13a provided in the coupling flange 13. When fastening by tightening, the fastening member 100 is fastened to one surface of the front plate 2, and thus the coupling of the front plate 2 and the back cover 3 is completed.

이때, 상기 전면판(2)의 개구부측에 형성된 패킹부(15)는 상기 체결부재(100)의 조임력으로부터 압착이 이루어지고, 상기와 같은 압착으로부터 상기 백 커버(3)내에 구성되는 LED모듈(5)로 이물질(예; 수분, 미세먼지)이 유입되는 것이 차단되고, 이에따라 상기 이물질에 의한 상기 LED모듈(5)의 작동 불량을 개선할 수 있게 되는 것이다.At this time, the packing part 15 formed at the opening side of the front plate 2 is pressed by the tightening force of the fastening member 100, and the LED module is configured in the back cover 3 from the pressing as described above ( 5) foreign matters (eg, moisture, fine dust) are blocked from entering, thereby improving the malfunction of the LED module 5 due to the foreign matters.

다음으로, 상기 외부케이스(1)의 전면으로 전면판(2)을 닫힘 회전하면, LED신호등의 결합구조가 완료될 수 있게 되는 것이다.Next, when the front plate 2 is closed to rotate in front of the outer case 1, the coupling structure of the LED signal lamp can be completed.

따라서, 본 발명은 상기와 같이 완료된 LED신호등을 실제 설치한 상태에서, 상기 LED신호등의 부품들 중 어느 하나가 고장(예; LED모듈의 파손)나거나 또는 그 교환이 필요할 경우, 작업자는 체결부재(100)의 조임력 해제를 통해 필요로 하는 부품 즉, 백커버(3), 렌즈커버(4), LED모듈(5)이 구성된 플랜지(6)를 각각 독립적으로 분리하여 교환할 수 있는 것이다.Therefore, in the present invention, the LED signal lamp completed as described above is actually installed, when any one of the components of the LED signal lamp (for example, breakage of the LED module) or need to replace the operator, the operator is required to fasten the member ( Through the release of the tightening force of the 100, that is, the back cover (3), the lens cover (4), the flange (6) consisting of the LED module 5 can be separated and replaced independently.

즉, 본 발명의 선행특허인 등록특허 제 637311 호는 백커버(3)와 렌즈커버(4) 그리고 플랜지(6)가 결합된 부품조립부재를 분리한 후, 상기 부품조립부재에서 다시 백커버(3)와 렌즈커버(4) 그리고 플랜지(6)를 분리해야 했지만, 개량된 본 발명은 바로 전면판(2)에서 백커버(3) 또는 렌즈커버(4) 또는 플랜지(6)를 각각 체결부재(100)의 조임력 해제를 통해 독립적으로 분리 가능하게 한 것으로, 그 수리 및 교환의 편의성을 향상시킨 것이다.That is, Patent No. 637311, which is a prior patent of the present invention, separates a part assembly member to which the back cover 3, the lens cover 4, and the flange 6 are coupled, and then again the back cover (from the part assembly member). 3) and the lens cover 4 and the flange 6 had to be separated, but the improved invention is a fastening member of the back cover 3 or the lens cover 4 or the flange 6 respectively at the front plate 2. Independently detachable by releasing the tightening force of (100) is to improve the convenience of repair and replacement.

한편, 도 3은 백커버(3)의 내부에 위치하는 또 다른 안착면(12')에 LED모듈(5)이 구성된 플랜지(6)를 고정하는 상태의 단면도를 도시한 본 발명의 다른실시예로, 이하 본 발명의 일실시예에서와 그 작용은 동일하므로 중복되는 설명은 생략하기로 한다.On the other hand, Figure 3 is another embodiment of the present invention showing a cross-sectional view of fixing the flange (6) consisting of the LED module 5 to another seating surface (12 ') located inside the back cover (3) In the following, since the operation is the same as in the embodiment of the present invention, redundant description will be omitted.

이상에서 설명한 바와같이 본 발명 부품 분리형의 신호등 구조는 LED신호등의 외부케이스에 백커버, 렌즈커버, LED모듈이 형성된 플랜지와 같은 LED신호등의 부품을 순차적으로 조립 구성한 것으로, 이를 통해 LED신호등 부품 중 어느 하나가 파손되거나 기타 교환주기가 되었을 때 그 부품만을 분리시킬 수 있도록 하는 등 관리상의 편의성을 향상시키고, 아울러 LED모듈이 수납되는 공간을 제공하는 백커버와 렌즈커버의 결합부위에 대한 밀폐 성능을 향상시키는 효과를 얻을 수 있는 것이다.As described above, the separate part of the signal light structure of the present invention is an assembly of an LED signal light such as a back cover, a lens cover, and a flange in which an LED module is formed in an outer case of the LED light, and thus, any one of the LED signal light parts It improves the convenience of management such that only the parts can be separated when one is broken or other replacement cycles, and also improves the sealing performance of the back cover and the lens cover coupling portion that provides a space for the LED module You can get the effect.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와같은 변경은 청구범위 기재의 범위내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (3)

록킹체결부를 가진 외부케이스와 전면판, 백커버, 렌즈커버, LED모듈이 형성된 플랜지를 포함하는 LED신호등 구조에 있어서,In the LED signal light structure including an outer case having a locking fastening portion and a front plate, a back cover, a lens cover, and a flange formed with an LED module, 상기 백커버의 내부에는 LED모듈이 형성된 플랜지가 안착되도록 제 1 체결홀이 각각 형성된 복수의 안착면을 단차지게 구성하고, 상기 플랜지의 가장자리면에는 상기 제 1 체결홀에 대응되는 제 2 체결홀을 구성하며, 상기 백커버는 체결부재의 조임력으로 상기 전면판과 결합되도록 그 가장자리면에 제 3 체결홀이 다수 형성된 결합플랜지를 구성하되,Inside the back cover, a plurality of seating surfaces each having first fastening holes are formed so as to seat a flange having an LED module thereon, and a second fastening hole corresponding to the first fastening hole is formed at an edge of the flange. The back cover comprises a coupling flange in which a plurality of third fastening holes are formed at its edges to be coupled to the front plate by the fastening force of the fastening member. 상기 백커버의 내부에는 상기 LED모듈에 연결되는 전원공급부를 구성하고, 상기 전원공급부는 외부케이스로 안내되는 전원공급선로에 배선되는 전원커넥터부와 연결 구성하며,The power supply unit is connected to the LED module inside the back cover, and the power supply unit is connected to a power connector unit wired to a power supply line guided to an external case. 상기 렌즈커버는 상기 LED모듈이 위치하는 백커버의 내부로 이물질이 유입되는 것을 차단하도록, 끼움홈부를 가진 고무재의 패킹부를 통해 상기 전면판으로 끼움 결합하고,The lens cover is fitted into the front plate through the packing portion of the rubber material having a fitting groove to block the foreign material from entering the interior of the back cover is located, the LED module, 상기 패킹부는 상기 전면판의 개구부측에 구성하는 것을 특징으로 하는 부품 분리형의 신호등 구조.The packing part is a signal light structure of a component separation type, characterized in that configured on the opening side of the front plate. 삭제delete 삭제delete
KR1020070004805A 2007-01-16 2007-01-16 A traffic signal structure of a parts separation KR100818249B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101254195B1 (en) 2012-04-26 2013-04-18 (주)에코파워텍 Traffic signal
KR101308981B1 (en) 2013-03-29 2013-09-16 (주)에코파워텍 Traffic signal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010011346A (en) * 1999-07-27 2001-02-15 오정연 A signal lamp
KR20040081848A (en) * 2003-03-17 2004-09-23 주식회사 대한전광 LED lamp for signal light
JP2005284532A (en) 2004-03-29 2005-10-13 Koito Ind Ltd Lighting unit for traffic signal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010011346A (en) * 1999-07-27 2001-02-15 오정연 A signal lamp
KR20040081848A (en) * 2003-03-17 2004-09-23 주식회사 대한전광 LED lamp for signal light
JP2005284532A (en) 2004-03-29 2005-10-13 Koito Ind Ltd Lighting unit for traffic signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101254195B1 (en) 2012-04-26 2013-04-18 (주)에코파워텍 Traffic signal
KR101308981B1 (en) 2013-03-29 2013-09-16 (주)에코파워텍 Traffic signal

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