JP5034383B2 - Display device - Google Patents

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Publication number
JP5034383B2
JP5034383B2 JP2006237453A JP2006237453A JP5034383B2 JP 5034383 B2 JP5034383 B2 JP 5034383B2 JP 2006237453 A JP2006237453 A JP 2006237453A JP 2006237453 A JP2006237453 A JP 2006237453A JP 5034383 B2 JP5034383 B2 JP 5034383B2
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Japan
Prior art keywords
erroneous lighting
prevention circuit
indicator lamp
screw
lighting prevention
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JP2006237453A
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JP2008060451A (en
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義彦 今上
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Meidensha Corp
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Meidensha Corp
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Description

この発明は、交流電源から交流電圧を表示灯に印加して発光表示する表示装置に関するものである。   The present invention relates to a display device that emits light by applying an AC voltage from an AC power source to a display lamp.

図３は従来の表示装置の一部回路図を示し、交流電源に電源線１ａ，１ｂ及びスイッチ２を介して表示灯３が並列に接続され、スイッチ２が投入されると、誤点灯防止回路４がない場合、交流電源からの交流電圧が表示灯３に印加され、表示灯３は発光する。そして、ノイズ、漏れ電流、高圧送電線等の誘起磁界による誘起起電力等により表示灯３が誤点灯する場合があり（特に表示灯３が高輝度ＬＥＤの場合）、これは予測するのが困難であるので、実際に誤点灯が生じた際に対策をとる必要があり、現場では表示灯３と並列にコンデンサＣと抵抗Ｒの直列回路からなる誤点灯防止回路４を接続していた。この誤点灯防止回路４は表示灯３に流れる電流を分流することにより、誤点灯を防止する。   FIG. 3 shows a partial circuit diagram of a conventional display device. When the indicator lamp 3 is connected in parallel to the AC power source via the power lines 1a and 1b and the switch 2, and the switch 2 is turned on, an erroneous lighting prevention circuit is shown. When there is no 4, AC voltage from an AC power source is applied to the indicator lamp 3, and the indicator lamp 3 emits light. Then, the indicator lamp 3 may be erroneously lit due to noise, leakage current, induced electromotive force caused by an induced magnetic field such as a high-voltage power transmission line (especially when the indicator lamp 3 is a high-intensity LED), and this is difficult to predict. Therefore, it is necessary to take measures when an erroneous lighting actually occurs, and an erroneous lighting prevention circuit 4 comprising a series circuit of a capacitor C and a resistor R is connected in parallel with the indicator lamp 3 in the field. This erroneous lighting prevention circuit 4 prevents erroneous lighting by diverting the current flowing through the indicator lamp 3.

なお、特許文献１においても、交流電源から電源線、制御スイッチ、変圧器を介して発光ダイオードに交流電圧を印加することが示され、やはり抵抗からなる誤点灯防止回路を発光ダイオードと並列に接続することが示されている。
特開平８−１３７４２９号公報 Patent Document 1 also shows that an AC voltage is applied from an AC power source to a light emitting diode via a power line, a control switch, and a transformer, and an erroneous lighting prevention circuit consisting of a resistor is also connected in parallel with the light emitting diode. Has been shown to do.
JP-A-8-137429

しかしながら、図３に示すように表示灯３に誤点灯防止回路４を並列に接続すると、図４（ａ）に示すように、表示灯３の一対の電源端子を形成するビス５においては、一方のビス５は電源線１ａと誤点灯防止回路４の一方の接続線６との２本締めとなるが、他方のビス５は電源線１ｂを渡り線で接続した場合、２本の電源線１ｂと誤点灯防止回路４の他方の接続線６との３本締めとなり、締め込みが円滑に行われなくなる。そこで、この場合には、図４（ｂ）に示すように、電源線１ｂを渡り線とせず、ビス５と制御盤内の中継端子台７とをそれぞれ１本の電源線１ｂにより接続していた。表示灯４ａ，４ｂは扉に設けられている場合がほとんどであり、電源線１ｂを制御盤内まで引き直すのには多くの工数を要し、かなりの時間と労力を要した。   However, when the erroneous lighting prevention circuit 4 is connected in parallel to the indicator lamp 3 as shown in FIG. 3, the screw 5 forming a pair of power terminals of the indicator lamp 3 as shown in FIG. The two screws 5 are tightened with the power supply line 1a and one connection line 6 of the erroneous lighting prevention circuit 4, while the other screw 5 has two power supply lines 1b when the power supply line 1b is connected with a jumper. And the other connection line 6 of the erroneous lighting prevention circuit 4 are tightened, and the tightening is not smoothly performed. Therefore, in this case, as shown in FIG. 4 (b), the power line 1b is not used as a crossover, but the screw 5 and the relay terminal block 7 in the control panel are each connected by one power line 1b. It was. In most cases, the indicator lamps 4a and 4b are provided on the door, and it takes a lot of man-hours to redraw the power line 1b to the inside of the control panel, and considerable time and labor are required.

この発明は上記のような課題を解決するために成されたものであり、予め誤点灯の対策をする必要がなく、かつ誤点灯が発生しても配線変更をする必要がない表示装置を得ることを目的とする。   The present invention has been made to solve the above-described problems, and provides a display device that does not need to take countermeasures against erroneous lighting in advance and does not need to change wiring even if erroneous lighting occurs. For the purpose.

この発明の請求項１に係る表示装置は、交流電源から交流電圧を発光ダイオードからなる表示灯に印加して発光表示する表示装置において、表示灯の一対の電源端子のビスの頭部中央には接続穴を形成し、この一対の接続穴に誤点灯防止回路の両端のコネクタピンを挿入して上記ビスと上記誤点灯防止回路を電気的に接続したものである。 According to a first aspect of the present invention, there is provided a display device that displays an emission by applying an AC voltage from an AC power source to a display lamp made of a light emitting diode. A connection hole is formed, and connector pins at both ends of the erroneous lighting prevention circuit are inserted into the pair of connection holes to electrically connect the screw and the erroneous lighting prevention circuit .

この発明によれば、表示灯の一対の電源端子のビスの頭部中央に接続穴を形成し、この一対の接続穴に誤点灯防止回路の両端のコネクタピンを挿入接続したので、電源線を渡り線としても表示灯の電源端子のビスは２本締めとなり、締め込みを円滑に行うことができる。このため、誤点灯が発生しても配線変更をする必要がなく、また誤点灯が生じた表示灯のみに誤点灯防止回路を接続すればよいので、予め誤点灯の対策をとる必要もなくなる。   According to this invention, the connection hole is formed in the center of the head of the screw of the pair of power supply terminals of the indicator lamp, and the connector pins at both ends of the erroneous lighting prevention circuit are inserted and connected to the pair of connection holes. Even as a crossover, two screws of the power terminal of the indicator lamp are tightened, and the tightening can be performed smoothly. For this reason, it is not necessary to change the wiring even if erroneous lighting occurs, and it is only necessary to connect the erroneous lighting prevention circuit only to the indicator lamp in which erroneous lighting has occurred.

以下、この発明を実施するための最良の形態を図面とともに説明する。図１はこの発明の実施最良形態による表示装置の要部斜視図、図２（ａ）〜（ｄ）は同じく誤点灯防止回路を接続された表示灯の斜視図、誤点灯防止回路の側面図、ビスの断面図及びビスの正面図を示し、表示灯３の電源端子であるビス５の頭部中央には接続穴５ａを形成し、誤点灯防止回路４には一対のコネクタピン４ａを形成する。そして、表示灯３に誤点灯が発生した場合には、誤点灯防止回路４の一対のコネクタピン４ａを表示灯３のビス５に形成した接続穴５ａに挿入接続する。   The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a main part of a display device according to the best mode of the present invention, FIGS. 2A to 2D are perspective views of a display lamp to which an erroneous lighting prevention circuit is connected, and a side view of the erroneous lighting prevention circuit. The sectional view of the screw and the front view of the screw are shown, a connection hole 5a is formed in the center of the head of the screw 5 which is a power supply terminal of the indicator lamp 3, and a pair of connector pins 4a are formed in the erroneous lighting prevention circuit 4. To do. Then, when erroneous lighting occurs in the indicator lamp 3, the pair of connector pins 4a of the erroneous lighting prevention circuit 4 is inserted and connected to the connection hole 5a formed in the screw 5 of the indicator lamp 3.

上記した実施最良形態においては、誤点灯防止回路４を表示灯３と並列に接続する場合、誤点灯防止回路４の一対のコネクタピン４ａを表示灯３の一対の電源端子のビス５の接続穴５ａに挿入すればよく、一方のビス５には電源線１ａを締め込み、他方のビス５には２本の電源線１ｂを渡り線で良好に締め込むことができる。このため、誤点灯防止回路４を表示灯３に並列に接続する場合、電源線１ｂの配線変更の必要がなくなり、また誤点灯が生じた表示灯３のみに誤点灯防止回路４を接続すればよいので、予め誤点灯の対策をとる必要もなくなる。   In the above-described best embodiment, when the erroneous lighting prevention circuit 4 is connected in parallel with the indicator lamp 3, the pair of connector pins 4a of the erroneous lighting prevention circuit 4 are connected to the connection holes of the screws 5 of the pair of power supply terminals of the indicator lamp 3. The power supply line 1a can be fastened to one screw 5 and the two power supply lines 1b can be well fastened to the other screw 5 with a crossover. For this reason, when the erroneous lighting prevention circuit 4 is connected to the indicator lamp 3 in parallel, it is not necessary to change the wiring of the power supply line 1b, and if the erroneous lighting prevention circuit 4 is connected only to the indicator lamp 3 in which the erroneous lighting has occurred. Since it is good, it is not necessary to take measures against erroneous lighting in advance.

この発明の実施最良形態による表示装置の要部斜視図である。It is a principal part perspective view of the display apparatus by this Embodiment best mode. 実施最良形態による誤点灯防止回路を接続された表示灯の斜視図、誤点灯防止回路の側面図、表示灯のビスの断面図及び表示灯のビスの正面図である。1 is a perspective view of an indicator lamp to which an erroneous lighting prevention circuit according to an embodiment is connected, a side view of the erroneous lighting prevention circuit, a sectional view of a screw of the indicator lamp, and a front view of a screw of the indicator lamp. 従来の表示装置の一部回路図である。It is a partial circuit diagram of the conventional display apparatus. 従来の表示装置の表示灯への電源線の接続状態を示す図である。It is a figure which shows the connection state of the power wire to the indicator lamp of the conventional display apparatus.

符号の説明Explanation of symbols

１ａ，１ｂ…電源線
３…表示灯
４…誤点灯防止回路
４ａ…コネクタピン
５…ビス
５ａ…接続穴
DESCRIPTION OF SYMBOLS 1a, 1b ... Power line 3 ... Indicator lamp 4 ... False lighting prevention circuit 4a ... Connector pin 5 ... Screw 5a ... Connection hole

Claims (1)

交流電源から交流電圧を発光ダイオードからなる表示灯に印加して発光表示する表示装置において、表示灯の一対の電源端子のビスの頭部中央には接続穴を形成し、この一対の接続穴に誤点灯防止回路の両端のコネクタピンを挿入して上記ビスと上記誤点灯防止回路を電気的に接続したことを特徴とする表示装置。 In a display device that emits light by applying an AC voltage from an AC power source to a display lamp made of a light emitting diode , a connection hole is formed in the center of the head of the screw of the pair of power supply terminals of the display lamp. A display device comprising: a connector pin at both ends of an erroneous lighting prevention circuit inserted to electrically connect the screw and the erroneous lighting prevention circuit .
JP2006237453A 2006-09-01 2006-09-01 Display device Expired - Fee Related JP5034383B2 (en)

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JP2006237453A JP5034383B2 (en) 2006-09-01 2006-09-01 Display device

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JP2006237453A JP5034383B2 (en) 2006-09-01 2006-09-01 Display device

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JP2008060451A JP2008060451A (en) 2008-03-13
JP5034383B2 true JP5034383B2 (en) 2012-09-26

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5560676U (en) * 1978-10-19 1980-04-24
JPS55100670U (en) * 1979-01-08 1980-07-12
JPS6138962U (en) * 1984-08-10 1986-03-11 三菱電機株式会社 LED type indicator light
JPH04229502A (en) * 1990-12-26 1992-08-19 Koito Mfg Co Ltd Light emitting diode(led) module

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