201142213 六、發明說明： 【發明所屬之技術領域】 本發明，是有關於從導光板的側面照射將LED (發光 二極管）作爲光源的照射光使從前述導光板的發光面發光 的LED照明裝置。 【先前技術】 近年來’已實現高輝度發光的LED，且至目前爲止主 要是朝使用作爲顯示用途的LED的照明用途的發展。LED ’與例如白熱球、螢光燈等的發光元件相比具有節能、長 壽命的特徵’今後的LED照明裝置的未來性會愈來愈廣 〇 LED因爲是點光源，所以LED照明裝置若採用單純 將點光源直接照射對象物的構造的話，對象物的周圍會發 生不必要的影子’而具有反而看不清楚的問題。例如，使 用從高輝度LED朝對象物直接照射的照明裝置進行文件 作成作業等的話，作成者的手和筆記用具的影子，與使用 習知的螢光燈等的照明的情況相比會更醒目，而具有使用 者的眼睛會因爲對比的差而容易疲勞的問題。且，雖也可 考慮將L E D多數並列構成配置的L E D照明裝置，但是如 此複數直接照射的LED的構造中，具有會導致對應其數 量的複數影子重疊產生而讓使用者的眼精容易疲勞的問題 〇 鑑於此點’近年來被提案使用導光板，將來自點光源 -5- 201142213 也就是LED的入射光在導光板內亂反射，從導光板的射 出面進行面發光的照明的構成。在例如專利文獻1中記載 了有關於使用這種的導光板的面發光照明裝置的基板交換 的技術。 [先行技術文獻] [專利文獻] [專利文獻1]日本特願2009-110278 【發明內容】 (本發明所欲解決的課題） 上述的使用導光板由面發光進行照明的發光部（發光 面）的面積是一定。若可以對應用途調節發光部（發光面 )的面積的話應該會很便利，但是在習知技術中未有可以 變更發光部（發光面）的面積的構成。 在例如藉由作業者的手的影子的影響使作業成爲不易 的場面，可以將發光部（發光面）的面積調節至方便（合 適）的大小的話，就可抑制影子的影響，作業就可變容易 ，且藉由使發光部（發光面）的面積可變，能預測也有當 收納時和不使用時可以減小尺寸等的優點。 在此，本發明的課題是可以提供對應用途變更發光部 (發光面）的面積或發光光量的led照明裝置》 (用以解決課題的手段） s -6- 201142213 爲了解決上述課題，在本發明中，採用一種LED照 明裝置，是從在後面配置反射板的導光板的側面照射led 的照射光使從前述導光板的發光面發光，其特徵爲：由前 述反射板、LED及導光板所構成的第1發光部組件，是在 由前述反射板、LED及導光板所構成的第2發光部組件的 前述反射板及前述導光板之間的空間可滑動自如地被支撐 ，當第1發光部組件是在被滑動容納於第2發光部組件的 狀態下，藉由：層疊狀態中的第1發光部組件的導光板及 第2發光部組件的導光板、及第1發光部組件的反射板， 進行面發光照明，當第1發光部組件是在從第2發光部組 件被拉出的狀態下，藉由第1及第2發光部組件的各前述 反射板、LED及導光板，進行面發光照明的構成。 或是進一步採用，具有前述的第1發光部組件被滑動 容納於第2發光部組件的構成的第1發光部，是透過轉動 軸與具有同樣的構造的第2發光部可轉動自如地結合的構 成。 [發明的效果] 依據上述構成，在將第1發光部組件滑動容納於第2 發光部組件的狀態下’且’在拉出的狀態下可以進行面發 光照明。藉由作成將發光部組件滑動容納的狀態’加大點 燈時發光面的每單位面積的發光輝度’就可獲得接近聚光 燈的照明效果，並且當L E D照明裝置的收納時、或不使 用時可以減小尺寸。且’採用藉由滑動容納機構’可以實 201142213 現發光部面積可變的面發光照明裝置，在例如因爲使用者 的手的影子的影響使作業不易、或是需要寬廣空間的照明 範圍的狀況時，可藉由擴大發光部面積來抑制影子的影響 ，且因爲照射領域增加，所以具有使用者的作業變容易的 優點。 且若採用第1發光部是透過具有同樣構造的第2發光 部及轉動軸可轉動自如被結合的構成的話，可以更廣範圍 地均一地進行面發光照明，且藉由變更第1發光部及第2 發光部相互形成的角度，可以調節照射角度。 【實施方式】 以下，依·據圖面所示的實施例說明本發明。以下，例 示如電氣支架台的形態的LED照明裝置的構成。但是， 以下所示的LED照明裝置的發光部的構成，不限定於電 氣支架台，也可以應用在發光部本身獨立的可攜帶的手電 筒的照明裝置。 [實施例1] 在第1圖〜第4圖中顯示本實施例的LED照明裝置 的構成。第1圖是採用本發明的本實施例的LED照明裝 置的立體圖，第2圖是第1圖的LED照明裝置的發光部 周圍的側面圖，第3圖是第1圖的LED照明裝置的發光 部的側面圖，第4圖是第1圖的LED照明裝置的發光部 的俯視圖。 & -8- 201142213 第1圖是顯示本實施例的電氣支架台的整體，如圖示 ，本實施例的電氣支架台是由基台部1、支柱部2、臂部 3、發光部4所構成。這些各部是由例如塑膠等的材料所 構成。 基台部1，具有從外部的AC轉接環（未圖示）接受 後述的LED的點燈電流的供給用未圖示的連接器部，並 且具有將LED點燈的導通（ON )/斷開（OFF )控制的開 關部50。從開關部50，經過臂部3直到發光部4爲止的 內部中配設有未圖示的纜線。此纜線是使用如後述的捲線 (第4圖）的可撓型式者。 在基台部1上立設有支柱部2。本實施例的支柱部2 、及臂部3，是各別由上部支柱2 1及下部支柱22、及下 部臂3 1、上部臂3 3所構成，這些皆具有爲了輕量化、和 提高樣式設計性的目的而設置的長孔。 臂部3的下部臂31是透過支軸23被軸支在上部支柱 2 1的長孔內》 且上部臂33是透過支軸32被軸支在下部臂31的上 端。 且在上部臂3 3的先端中裝設有由發光部組件4a及 所構成的發光部4。 發光部4是由：發光部組件4a、及將發光部組件4a 滑動收容的發光部組件4b所構成，第1圖是顯示從發光 部組件4a將發光部組件4b拉出的狀態。 在第2圖中將支柱部2(上部支柱21)、臂部3 (上 -9- 201142213 部及下部臂3 1、3 3 )及發光部4從側面顯示。在第2圖 中，顯示發光部4的內部透視（剖面）的構造。且，在第 2圖中發光部組件4a是成爲被收容於發光部組件4b的狀 m 。 發光部4是由發光部組件4a及4b所構成。發光部組 件4a是可滑動收納於發光部組件4b，發光部組件4a及 4b，是由：導光板6a、6b、及各別被配置於這些導光板 6a、6b的側面的LED5a、5b、及2枚的反射板7a、7b所 構成。 第3圖是在從發光部組件4a將發光部組件4b拉出的 狀態下顯示發光部組件4a及發光部組件4b。 如第2圖及第3圖所示，發光部組件4a及發光部組 件4b的LED5a、5b是被配置於導光板6a、6b的側面， 將此端緣照射。導光板6a、6b，是在表面至背面施加主 要藉由亂反射產生面發光的加工（毛面加工和點加工）， 導光板6a、6b的發光面是朝向下方（第1圖、第3圖的 下方）。 LED5 a及5b是在各被組合的導光板6a、6b的各側面 由每複數個（例如第4圖的例爲4個）等間隔配置。 發光部組件4a及4b的背面（第1圖、第3圖中的上 面）是成爲反射板7a、7b。在此爲了簡略化兼具發光部 組件4a及4b的框體，但是反射板7a、7b是設成與發光 部組件4a及4b的框體別體也可以。在第3圖中，發光部 組件4a及4b的下面雖各別覆蓋例如白色且具有光澤（例 -10- 5^/ 201142213 如窺視的話可看到臉）的構件，或施加反射擴散性較高的 白色塗裝加工較佳，由此可以從導光板6a、6b下面的發 光面效率佳地照射照明光。 發光部組件4a，是可以被滑動收容於發光部組件4b 的方式構成，如第2圖、第3圖所示發光部組件4a是被 滑動收容於發光部組件4b的導光板6b及反射板7b之間 的空間。發光部組件4a，是藉由各別設在發光部組件4b 的兩側內緣的軌道（未圖示）被滑動支撐。 發光部組件4a，是直到預定的最大拉出位置（例如 第1圖的位置）爲止被拉出之後，使不會被越限拉出而脫 落，在發光部組件4a及發光部組件4b的卡合部位的預定 位置設置未圖示的停止器。 第4圖是將第3圖的拉出狀態從上方透過地顯示。朝 發光部組件4a供給電源的纜線1 2，由具有如圖示的捲線 (或其他的伸縮性的可撓性的纜線）所構成。在第4圖中 爲了理解容易而將纜線1 2圖示在發光部組件4a、4b的外 側，但較佳是在可伸縮自如的狀態下將纜線1 2配置在發 光部組件4a、4b內的適當的空部。又，在第4圖中符號 1 1是將導光板6a、6b和反射板7a、7b各別固定在預定 位置用的挾具。 在以上的構成中，發光部組件4a是被滑動收容發光 部組件4b的導光板6b及反射板7b之間的空間。因此， 如第2圖當第一發光部組件4a被容納於第二發光部組件 4b時藉由開關部50導通（ON )電源將LED 5a、5b點燈 -11 - 201142213 的話，層疊狀態中的導光板6a、6b因爲是透明（或半透 明）所以即使重疊光也會透過，所以從LED5 a及5b被射 出的雙方的光被合成使導光板6b面發光，因此發光面（ 每單位面積）的發光輝度是成爲本裝置的最大者。在第2 圖的狀態下只有反射板7a的反射面是作爲反射面功能。 另一方面，如第3圖所示，將第一發光部組件4a拉 出的話，照射面積是成爲約2倍。發光面（每單位面積） 的發光輝度是成爲第2圖的情況的一半，但是藉由發光部 面積變大，照射領域增加而容易寬廣空間的作業，可以減 少朝使用者的作業區域的影子的影響。 如以上，本實施例的LED照明裝置是採用滑動容納 機構，在將第1發光部組件4a滑動容納於第2發光部組 件4b的狀態，且，在拉出的狀態皆可以進行面發光照明 。藉由作成將發光部組件滑動容納的狀態，加大點燈時發 光面的每單位面積的發光輝度，就可獲得接近聚光燈的照 明效果，並且當LED照明裝置的收納時、或不使用時可 以減小尺寸。且，採用藉由滑動容納機構’可以實現發光 部面積可變的面發光照明裝置，藉由例如使用者的手的影 子的影響而不易作業的狀況時，藉由擴大發光部面積來抑 制影子的影響，就具有使用者的作業變容易的優點。 [實施例2 ] 在第5圖〜第7圖中，顯示將與上述實施例的滑動容 納構造的發光部4相同構造的發光部8透過旋轉軸結合， -12- 201142213 而成爲可以折疊的構造。 第5圖及第ό圖是相當於上述實施例的第2圖及第4 圖，第5圖是顯示本實施例的LED照明裝置的發光部的 構造的側面圖’第6圖是顯示展開第5圖的發光部狀態的 俯視圖。且’第7圖是顯示第5圖的發光部的照明功能的 說明圖。 如第5圖、第6圖所示發光部8是由與發光部4相同 構造，由發光部組件8 a、8 b所構成，發光部組件8 a、8 b 是與發光部組件4a、4b同樣地由：導光板6a、6b、及各 別被配置於這些導光板6a、6b側面的LED5 a、5b、及2 枚的反射板7a、7b所構成。 發光部組件8a、8b，是對於發光部組件4a、4b透過 轉動軸1 3 (第6圖）可轉動自如地結合。在第5圖中， 轉動軸1 3是位於滑動容納狀態中的發光部組件4a、4b、 發光部組件8 a、8b的後側而未圖示，但是發光部組件8 a 、8b是透過此轉動軸13在發光部組件4a、4b上由與發 光部組件4a、4b上下相反的方向被折疊（折疊容納狀態 )° 第6圖，是顯示從第5圖的折疊容納狀態，透過轉動 軸13展開發光部組件8a、8b，且，透過上述的滑動機構 將發光部組件4a、8a從發光部組件4b、8b拉出的狀態。 又，轉動軸1 3的尺寸，是作成可隱藏於如第5圖所 示在發光部4、8的後側，其長度是如第6圖所示與容納 有發光部4、8時者幾乎等同》 -13- 201142213 如第6圖所示，在此狀態下在展開/拉出狀態下發光 部面積與容納狀態（第5圖或上述實施例的第2圖）相比 較是成爲約4倍，可以更廣範圍且均一地進行面發光照明 。且，如第7圖所示藉由透過轉動軸13變更發光部4、8 相互形成的角度，就可以調節照射角度。又，朝發光部組 件8a、8b的電源供給是透過轉動軸1 3內的電氣接點和/ 或纜線配線進行。 【圖式簡單說明】 [第1圖]採用本發明的LED照明裝置的立體圖。 [第2圖]顯示第1圖的LED照明裝置的發光部周圍的 構造的側面圖。 [第3圖]顯示第1圖的LED照明裝置的發光部的滑動 構造的側面圖。 [第4圖]第1圖的LED照明裝置的發光部的俯視圖。 [第5圖]顯示採用本發明的LED照明裝置的發光部的 不同的構造的側面圖。 [第6圖]顯示展開第5圖的發光部狀態的俯視圖。 [第7圖]顯示第5圖的發光部的照明功能的說明圖。 【主要元件符號說明】 1 :基台部 2 :支柱部 3 :臂部[Technical Field] The present invention relates to an LED illumination device that emits illumination light from an LED (light-emitting diode) as a light source from a side surface of a light guide plate to emit light from a light-emitting surface of the light guide plate. [Prior Art] In recent years, LEDs that have achieved high-luminance light emission have been mainly developed toward the use of LEDs for display applications. LED 'has energy saving and long life characteristics compared with light-emitting elements such as white hot balls and fluorescent lamps. 'The future of LED lighting devices will become more and more promising. LEDs are point light sources, so LED lighting devices are used. When the point light source is directly irradiated to the structure of the object, an unnecessary shadow appears around the object, and there is a problem that it is not clearly seen. For example, when a document creation job or the like is performed using an illumination device that directly illuminates an object with a high-intensity LED, the shadow of the hand of the creator and the writing instrument is more conspicuous than when using a conventional fluorescent lamp or the like. And there is a problem that the user's eyes are prone to fatigue due to poor contrast. Further, although an LED illuminating device in which a plurality of LEDs are arranged in parallel is also conceivable, in the structure of the LEDs that are directly illuminating in a plurality of cases, there is a problem that a plurality of shadows corresponding to the number of shadows are overlapped, and the eye of the user is easily fatigued. In view of the above, in recent years, it has been proposed to use a light guide plate to illuminate the incident light from the point light source-5-201142213, that is, the LED, in the light guide plate, and to illuminate the surface from the light exit surface of the light guide plate. For example, Patent Document 1 describes a technique for substrate exchange in a surface-emitting illumination device using such a light guide plate. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Application No. 2009-110278 (Problems to be Solved by the Invention) The above-described light-emitting portion (light-emitting surface) that uses a light guide plate to illuminate by surface light emission The area is certain. It should be convenient if the area of the light-emitting portion (light-emitting surface) can be adjusted for the purpose, but there is no configuration in which the area of the light-emitting portion (light-emitting surface) can be changed in the prior art. For example, when the work area is made difficult by the influence of the shadow of the operator's hand, the area of the light-emitting portion (light-emitting surface) can be adjusted to a convenient (suitable) size, and the influence of the shadow can be suppressed, and the work can be changed. It is easy, and by making the area of the light-emitting portion (light-emitting surface) variable, it is possible to predict that there is an advantage that the size can be reduced when stored and when not in use. Here, an object of the present invention is to provide a LED lighting device that can change the area of the light-emitting portion (light-emitting surface) or the amount of light emitted in accordance with the use (a means for solving the problem) s -6-201142213 In order to solve the above problems, the present invention In an LED lighting device, an illumination light from a side of a light guide plate on which a reflector is disposed behind is irradiated with light from a light-emitting surface of the light guide plate, and is characterized in that: the reflector, the LED, and the light guide plate are formed. The first light-emitting unit assembly is slidably supported by a space between the reflector and the light guide plate of the second light-emitting unit assembly including the reflector, the LED, and the light guide plate, and is the first light-emitting unit. The light guide plate of the first light-emitting unit assembly and the light guide plate of the second light-emitting unit assembly and the reflector of the first light-emitting unit assembly in a state in which the module is slidably accommodated in the second light-emitting unit assembly Performing surface illumination, when the first light-emitting unit assembly is pulled out from the second light-emitting unit assembly, the reflectors, the LEDs, and the light guide plate of the first and second light-emitting unit assemblies are used. The composition of the surface illumination is performed. Further, the first light-emitting portion having the configuration in which the first light-emitting portion unit is slidably accommodated in the second light-emitting portion unit is rotatably coupled to the second light-emitting portion having the same structure through the rotating shaft. Composition. [Effects of the Invention] According to the above configuration, the surface emitting illumination can be performed in a state where the first light-emitting unit assembly is slidably accommodated in the second light-emitting unit assembly. The illumination effect close to the spotlight can be obtained by creating a state in which the light-emitting unit assembly is slidably accommodated, and the illumination luminance per unit area of the light-emitting surface when lighting is increased, and can be used when the LED illumination device is stored or not used. Reduce the size. And 'the sliding accommodating mechanism' can be used as a surface-emitting illuminating device with a variable illuminating area, which is difficult to work, for example, because of the influence of the shadow of the user's hand, or when a wide-area lighting range is required. By enlarging the area of the light-emitting portion, the influence of the shadow can be suppressed, and since the field of irradiation is increased, there is an advantage that the user's work becomes easy. Further, when the first light-emitting portion is configured to be rotatably coupled to each other through the second light-emitting portion and the rotating shaft having the same structure, the surface-emission illumination can be uniformly performed in a wider range, and the first light-emitting portion and the first light-emitting portion can be changed. The angle at which the second light-emitting portions are formed with each other can adjust the irradiation angle. [Embodiment] Hereinafter, the present invention will be described based on an embodiment shown in the drawings. Hereinafter, the configuration of the LED lighting device in the form of an electric stand will be exemplified. However, the configuration of the light-emitting portion of the LED lighting device shown below is not limited to the electric stand, and may be applied to an illuminating device of a portable flash that is independent of the light-emitting portion itself. [Embodiment 1] The configuration of the LED lighting device of this embodiment is shown in Figs. 1 to 4 . Fig. 1 is a perspective view of an LED illumination device according to the present embodiment of the present invention, Fig. 2 is a side view of the periphery of a light-emitting portion of the LED illumination device of Fig. 1, and Fig. 3 is a view showing illumination of the LED illumination device of Fig. 1. FIG. 4 is a plan view of a light-emitting portion of the LED lighting device of FIG. 1 . & -8- 201142213 Fig. 1 is a view showing the entirety of the electric stand of the present embodiment. As shown in the figure, the electric stand of the present embodiment is composed of the base portion 1, the post portion 2, the arm portion 3, and the light emitting portion 4. Composition. These parts are made of a material such as plastic. The base unit 1 has a connector unit (not shown) for supplying a lighting current of an LED to be described later from an external AC adapter ring (not shown), and has an ON/OFF LED lighting. The switch unit 50 that is controlled to be turned OFF. A cable (not shown) is disposed in the interior of the switch unit 50 from the arm portion 3 to the light-emitting portion 4. This cable is a flexible type that uses a winding (Fig. 4) as will be described later. A pillar portion 2 is vertically provided on the base portion 1. The pillar portion 2 and the arm portion 3 of the present embodiment are each composed of an upper pillar 2 1 and a lower pillar 22, a lower arm 3 1 and an upper arm 3 3, which are designed for weight reduction and design. Long holes set for sexual purposes. The lower arm 31 of the arm portion 3 is axially supported by the support shaft 23 in the long hole of the upper stay 2 1 and the upper arm 33 is pivotally supported by the upper end of the lower arm 31 via the support shaft 32. Further, the light-emitting portion 4a and the light-emitting portion 4 are provided in the tip end of the upper arm 33. The light-emitting unit 4 is composed of a light-emitting unit 4a and a light-emitting unit 4b that slidably accommodates the light-emitting unit 4a. Fig. 1 shows a state in which the light-emitting unit 4b is pulled out from the light-emitting unit 4a. In Fig. 2, the pillar portion 2 (upper pillar 21), the arm portion 3 (the upper -9-201142213 portion and the lower arms 3 1 and 3 3), and the light-emitting portion 4 are shown from the side. In Fig. 2, the structure of the internal perspective (cross section) of the light-emitting portion 4 is shown. Further, in Fig. 2, the light-emitting unit 4a is in a state of being housed in the light-emitting unit 4b. The light-emitting portion 4 is composed of the light-emitting portion assemblies 4a and 4b. The light-emitting unit 4a is slidably housed in the light-emitting unit 4b, and the light-emitting unit assemblies 4a and 4b are: light guide plates 6a and 6b, and LEDs 5a and 5b respectively disposed on the side surfaces of the light guide plates 6a and 6b, and Two reflectors 7a and 7b are formed. Fig. 3 is a view showing the light-emitting unit 4a and the light-emitting unit 4b in a state where the light-emitting unit 4b is pulled out from the light-emitting unit 4a. As shown in Figs. 2 and 3, the LEDs 5a and 5b of the light-emitting unit 4a and the light-emitting unit 4b are disposed on the side faces of the light guide plates 6a and 6b, and the edges are irradiated. The light guide plates 6a and 6b are processed (matte surface processing and spot processing) in which surface light is mainly generated by random reflection from the front surface to the back surface, and the light-emitting surfaces of the light guide plates 6a and 6b are directed downward (Fig. 1 and Fig. 3). Below). The LEDs 5a and 5b are arranged at equal intervals on each side surface of each of the light guide plates 6a and 6b to be combined (for example, four in the example of Fig. 4). The back surfaces (upper in the first drawing and the third drawing) of the light-emitting unit modules 4a and 4b are the reflecting plates 7a and 7b. Here, in order to simplify the housing of the light-emitting unit assemblies 4a and 4b, the reflectors 7a and 7b may be separate from the housings of the light-emitting unit assemblies 4a and 4b. In Fig. 3, the lower surfaces of the light-emitting unit assemblies 4a and 4b are each covered with, for example, a white color and having a luster (for example, a face can be seen if viewed from a peek), or a reflection diffusing property is high. The white coating process is preferred, whereby the illumination light can be efficiently illuminated from the light-emitting surface below the light guide plates 6a, 6b. The light-emitting unit 4a is slidably housed in the light-emitting unit 4b. The light-emitting unit 4a shown in FIGS. 2 and 3 is a light guide plate 6b and a reflector 7b that are slidably housed in the light-emitting unit 4b. The space between. The light-emitting unit 4a is slidably supported by rails (not shown) provided on the inner edges of both sides of the light-emitting unit assembly 4b. The light-emitting unit 4a is pulled out after being pulled out until a predetermined maximum pull-out position (for example, the position of the first figure), and is detached from the light-emitting unit 4a and the light-emitting unit 4b. A stopper (not shown) is provided at a predetermined position of the joint portion. Fig. 4 is a view showing the pull-out state of Fig. 3 transmitted from above. The cable 12 that supplies power to the light-emitting unit 4a is composed of a winding (or other flexible flexible cable) as shown. In Fig. 4, the cable 12 is illustrated on the outside of the light-emitting unit assemblies 4a, 4b for ease of understanding, but it is preferable to arrange the cable 12 in the light-emitting portion assembly 4a, 4b in a retractable state. Appropriate void within. Further, in Fig. 4, reference numeral 1 1 is a cooker for fixing the light guide plates 6a and 6b and the reflection plates 7a and 7b to respective predetermined positions. In the above configuration, the light-emitting unit 4a is a space between the light guide plate 6b and the reflection plate 7b that are slidably housed in the light-emitting unit assembly 4b. Therefore, as shown in FIG. 2, when the first light-emitting portion assembly 4a is housed in the second light-emitting portion assembly 4b, the LEDs 5a, 5b are turned on by the switch portion 50 (ON), and the LEDs 5a, 5b are turned on -11 - 201142213, in the stacked state. Since the light guide plates 6a and 6b are transparent (or translucent), even if the superimposed light is transmitted, the light emitted from the LEDs 5a and 5b is combined and the surface of the light guide plate 6b is illuminated. Therefore, the light-emitting surface (per unit area) The luminance of the light is the largest of the devices. In the state of Fig. 2, only the reflecting surface of the reflecting plate 7a functions as a reflecting surface. On the other hand, as shown in Fig. 3, when the first light-emitting portion unit 4a is pulled out, the irradiation area is approximately doubled. The illuminating surface of the illuminating surface (per unit area) is half of the case of the second drawing. However, the area of the illuminating unit is increased, and the irradiation area is increased to facilitate the operation of a wide space, so that the shadow of the working area of the user can be reduced. influences. As described above, the LED lighting device of the present embodiment employs a slide housing mechanism, and the first light-emitting unit assembly 4a is slidably accommodated in the second light-emitting unit assembly 4b, and the surface illumination can be performed in the pulled-out state. By forming the state in which the light-emitting unit assembly is slidably accommodated, and increasing the light-emitting luminance per unit area of the light-emitting surface when lighting, the illumination effect close to the spotlight can be obtained, and when the LED lighting device is stored or not used, Reduce the size. Further, when the surface light-emitting illumination device having a variable light-emitting area can be realized by the sliding storage mechanism', when the operation is not easy due to the influence of the shadow of the user's hand, the shadow area is suppressed by enlarging the area of the light-emitting portion. The influence has the advantage that the user's work becomes easy. [Embodiment 2] In the fifth to seventh drawings, the light-emitting portion 8 having the same structure as that of the light-emitting portion 4 of the slide-accommodating structure of the above-described embodiment is coupled to the rotating shaft, and is -12-201142213, and is foldable. . 5 and the drawings are the second and fourth figures corresponding to the above-described embodiment, and FIG. 5 is a side view showing the structure of the light-emitting portion of the LED lighting device of the present embodiment. FIG. 6 is a view showing the expansion. A plan view of the state of the light-emitting portion of Fig. 5. Further, Fig. 7 is an explanatory view showing the illumination function of the light-emitting portion of Fig. 5. The light-emitting portion 8 has the same structure as that of the light-emitting portion 4, as shown in Figs. 5 and 6, and is composed of the light-emitting portion assemblies 8a, 8b, and the light-emitting portion assemblies 8a, 8b are combined with the light-emitting portion assemblies 4a, 4b. Similarly, the light guide plates 6a and 6b and the LEDs 5a and 5b disposed on the side surfaces of the light guide plates 6a and 6b and the two reflection plates 7a and 7b are formed. The light-emitting unit assemblies 8a and 8b are rotatably coupled to the light-emitting unit units 4a and 4b via a rotating shaft 13 (Fig. 6). In Fig. 5, the rotation shaft 13 is a rear side of the light-emitting unit assemblies 4a and 4b and the light-emitting unit assemblies 8a and 8b in the sliding accommodation state, but is not shown, but the light-emitting unit assemblies 8a and 8b are transmitted through this. The rotating shaft 13 is folded in a direction opposite to the upper and lower sides of the light-emitting portion assemblies 4a, 4b on the light-emitting portion assemblies 4a, 4b (folded and accommodated state). Fig. 6 is a view showing the folded-receiving state from the fifth drawing, through the rotating shaft 13 The light-emitting unit assemblies 8a and 8b are unfolded, and the light-emitting unit assemblies 4a and 8b are pulled out from the light-emitting unit units 4b and 8b by the above-described sliding mechanism. Further, the size of the rotating shaft 13 is made to be hidden on the rear side of the light-emitting portions 4, 8 as shown in Fig. 5, and the length thereof is almost as shown in Fig. 6 and when the light-emitting portions 4, 8 are accommodated. Equivalent -13- 201142213 As shown in Fig. 6, in this state, the area of the light-emitting portion in the unfolded/pulled state is about 4 times compared with the state of accommodation (Fig. 5 or the second figure of the above embodiment). The surface illumination can be performed in a wider range and uniformly. Further, as shown in Fig. 7, by changing the angle formed by the light-emitting portions 4, 8 through the rotating shaft 13, the irradiation angle can be adjusted. Further, power supply to the light-emitting unit assemblies 8a and 8b is performed through electrical contacts and/or cable wiring in the rotating shaft 13. BRIEF DESCRIPTION OF THE DRAWINGS [Fig. 1] A perspective view of an LED lighting device of the present invention. [Fig. 2] A side view showing the structure around the light-emitting portion of the LED lighting device of Fig. 1. [Fig. 3] A side view showing a sliding structure of a light-emitting portion of the LED lighting device of Fig. 1. [Fig. 4] A plan view of a light-emitting portion of the LED lighting device of Fig. 1. Fig. 5 is a side view showing a different structure of a light-emitting portion using the LED lighting device of the present invention. [Fig. 6] A plan view showing a state in which the light-emitting portion of Fig. 5 is developed. [Fig. 7] An explanatory view showing an illumination function of the light-emitting portion of Fig. 5. [Description of main component symbols] 1 : Abutment 2 : Pillar 3 : Arm
"14- 201142213 4 :發光部 4a =發光部組件 4b :發光部組件 5a: LED 5b ： LED 6a :導光板 6b :導光板 7a :反射板 7b :反射板 8 :發光部 8 a，8 b :發光部組件 1 2 :纜線 1 3 :轉動軸 2 1 :上部支柱 22 :下部支柱 23 :支軸 3 1 :下部臂 32 :支軸 3 3 :上部臂 5 0 :開關部"14- 201142213 4 : Light-emitting portion 4a = Light-emitting portion assembly 4b: Light-emitting portion assembly 5a: LED 5b: LED 6a: Light guide plate 6b: Light guide plate 7a: Reflecting plate 7b: Reflecting plate 8: Light-emitting portion 8a, 8b : Light-emitting unit assembly 1 2 : Cable 1 3 : Rotary shaft 2 1 : Upper strut 22 : Lower strut 23 : Support shaft 3 1 : Lower arm 32 : Support shaft 3 3 : Upper arm 5 0 : Switch unit