【０００１】
【発明の属する技術分野】
本発明は、ＬＥＤランプを光源とする照明器具に係り、色ムラが無い均一な照明光を得ることができる照明器具に関する。
【０００２】
【従来の技術】
近年、ＬＥＤランプを光源とする照明器具が注目され、例えば建築物と一体化されたＬＥＤ光源の建築化照明器具等が提案されているが、ＬＥＤ光源の照明光は高い指向性を有し、例えば中心部分が青色光、周辺部分が黄色光のように色ムラを生ずるため、ＬＥＤ光源の照明器具に於いて照明光の色合いを均一化する技術が重要となる。
【０００３】
ＬＥＤ光源を用いた照明器具の照明光の色合いを均一化する技術が開示されている公知文献として特許文献１がある。特許文献１には、ＬＥＤランプを所定の指向方向で配設し、そのＬＥＤランプの前方に表面に微細な凹凸が形成された拡散板を設け、その拡散板でＬＥＤランプの照明光の色調を略均一化する照明器具が開示されている。
【０００４】
【特許文献１】特開２００１−２６６６０６号公報
【０００５】
【発明が解決しようとする課題】
ところで、照明器具に於いてはデザインや用途に応じて製品の多様性が強く要求され、それに応じて照明光の色合いを均一化することができる多様な技術が切望されている。また、光量を増加して効率的な照明を行えることも照明器具として極めて重要である。
【０００６】
本発明は上記課題に鑑み提案するものであって、ＬＥＤランプを光源とする照明器具に於いて、照明光の色ムラを無くし、均一な色合いの良好な照明光を得ることができると共に、光量を増加して効率的な照明を行うことができる照明器具を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の照明器具は、少なくとも、光軸方向が異なる角度となるように配設される複数のＬＥＤランプと、反射板を備え、該複数のＬＥＤランプの光軸が該反射板で略集合する構成であることを特徴とする。例えば第１のＬＥＤランプの光軸方向と、第１のＬＥＤランプに近傍に配置される第２のＬＥＤランプの光軸方向を異ならせ、第１と第２のＬＥＤランプの光軸が反射板上で略集合する構成や、第１のＬＥＤランプと、該反射板を挟んで対称位置に、第１のＬＥＤランプに対応し且つ異なる光軸角度で設けられる第３のＬＥＤランプを有し、第１と第３のＬＥＤランプの光軸が反射板上で略集合する構成等とする。反射板上で複数のＬＥＤランプの光軸を略集合させ、照明器具の照明光の光量を増加することができると共に、前記反射板の略集合箇所等に於ける照明光の混色で色ムラを無くし、色合いの均一な白色光等の良好な照明光を得ることができる。
【０００８】
さらに、本発明の照明器具は、第１のＬＥＤランプと、第１のＬＥＤランプの近傍に配設される第２のＬＥＤランプと、該反射板を挟んで対称位置に、第１のＬＥＤランプに対応する光軸角度で設けられる第３のＬＥＤランプと、第２のＬＥＤランプに対応する光軸角度で設けられる第４のＬＥＤランプとを備え、該第１乃至第４のＬＥＤランプの光軸が該反射板で略集合する構成であることを特徴とする。前記構成により、照明器具の照明光の光量の増加、照明光の色合いの均一化等の効果をより一層顕著に発揮できる。
【０００９】
尚、前記複数のＬＥＤランプを長手方向に並設し、前記光軸の略集合箇所を略線状に並列する照明器具とすると、細長の室内灯などに適用することが可能となって好適であり、又、複数のＬＥＤランプの光軸を略一点に集合させる構成として、スポットライト等に使用してもよい。又、略線状に光軸の先端が反射板に並列するようにし、略線状に略集合が構成されるようにしてもよい。又、ＬＥＤランプの個数は、２以上の複数であれば３、４、５、６個など適宜である。
【００１０】
【発明の実施の形態】
以下では、本発明の照明器具について図に於ける具体的な実施形態に基づき説明する。図１は第１実施形態の照明器具を示す縦断側面図である。
【００１１】
第１実施形態の照明器具１は、図１に示すように、天井Ｃに埋め込まれて設けられる天井灯であり、紙面垂直方向を長手方向とする略細長箱形の収納部２を有し、収納部２は開口を下方に向けて天井Ｃに埋め込まれ、ボルト３及びナット４で固定され取り付けられている。収納部２の内部には、同様に紙面垂直方向を長手方向とする細長の基体５が内設されており、基体５には、略山形の突起或いは突条５１を挟んで略凹溝形の筐体取付部５２・５２が設けられ、その上面は略弧状の反射板５３になっている。
【００１２】
筐体６は紙面垂直方向を長手方向とする略細長箱形であり、底板６１及び略中間位置に架設されている取付板６２を挟んで、一方に取付板６２より下方位置に配線等に用いる開口６３が形成されている側板６４と、他方に開口がない側板６５を有する。前記取付板６２及び側板６４、６５に囲まれた略凹溝形の部分はＬＥＤランプ７の収容部分になっており、紙面垂直方向を長手方向とする細長板のＬＥＤ基板８上に、その長手方向に沿って複数のＬＥＤランプ７が並設され、ＬＥＤランプ７はＬＥＤ基板８を介在して取付板６２に取り付けられ、筐体６の開口に向けて設けられている。各ＬＥＤランプ７は図に省略した配線及び回路構造により点灯・消灯するようになっている。
【００１３】
ＬＥＤランプ７を収容する筐体６は、それぞれ筐体取付部５２に収容され、突条５１を挟んで上下に近傍位置で設けられており、各筐体６は開口がない方の側板６５の外側面を突条５１の側面に接触し、図に省略した取付具で筐体取付部５２に固定されている。前記筐体６が取り付けられた状態では、突条５１の上側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌと、上側のＬＥＤランプ７と略同一位置で、突条５１の下側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌとが、反射板５３の所定位置、例えば図１の集合箇所Ｆ或いは集合領域に略集合するようになっており、換言すれば前記所定位置に光軸Ｌが略集合する所定角度で突条５１の上側のＬＥＤランプ７と下側のＬＥＤランプ７が配設されている。更に、前記上側のＬＥＤランプ７と下側のＬＥＤランプ７は、紙面垂直方向の長手方向に複数組並設され、前記光軸Ｌの略集合箇所が略線状に並列されている。Ｌ１は例えば指向角半値幅の光など、明るさ強度が最大の正面光軸Ｌに対し所定の明るさ強度指向角の光である。
【００１４】
更に、筐体６の開口６３が形成されている側板６４の外側には前記側板６４の外側面に略沿って板バネ９が配設され、板バネ９は筐体６を突条５１の方向へ付勢して、筐体６の側板６５の外側面を突条５１の側面に押圧して圧接しており、筐体６の突条５１への面接触により、ＬＥＤランプ７の発熱に対する筐体６、基体５、収納部２へ至る放熱性が高い放熱経路を構成し、ＬＥＤランプ７或いは照明器具１の寿命の長期化を図っている。尚、基体５、筐体６、収納部２はアルミニウム等の放熱性が高い素材で形成されている。
【００１５】
上記第１実施形態の照明器具１により、複数のＬＥＤランプ７の光軸Ｌを反射板５３上で複数のＬＥＤランプ７の光軸を集合箇所Ｆに略集合させ、照明器具１の照明光の光量を増加することができると共に、前記反射板５３の略集合箇所や反射板５３のその他の位置の照明光の反射等により、例えば青色や黄色などのＬＥＤランプ７の照明光を混色し、色調の平均化を図って色ムラを無くし、色合いの均一な白色光等の良好な照明光を得ることができる。
【００１６】
次に、本発明の第２実施形態の照明器具１について説明する。図２は第２実施形態の照明器具を示す縦断側面図である。尚、第２実施形態の照明器具１で特に言及しない基本構成は、第１実施形態の照明器具１と同様である。
【００１７】
第２実施形態の照明器具１は、図２に示すように、天井から吊り下げられて設置される天井灯であり、略細長箱形の収納部２が開口を下方に向けて配置され、ボルト３及びナット４で固定され取り付けられている。収納部２に内設されている基体５は、略弧状の反射板５３と、反射板５３の左右にそれぞれ別体で配置される、略山形の突起或いは突条５１と突条５１を挟んで形成されている略凹溝形の筐体取付部５２を備える筐体保持部５４とで構成されている。筐体保持部５４は略上部で反射板５３の端部に係合していると共に、下端から外方に突出したＬ字部が収納部２の内方に突出したＬ字部に係合し、収納部２に取り付けられている。
【００１８】
筐体６の構成やＬＥＤランプ７、ＬＥＤ基板８、板バネ９の構成等は上記第１実施形態と同様であり、ＬＥＤランプ７を収容する筐体６はそれぞれ筐体取付部５２に収容され、突条５１を挟んで上下に近傍位置で設けられており、各筐体６は側板６５の外側面を突条５１の側面に接触し、筐体取付部５２に固定されている。そして、第２実施形態のＬＥＤランプ７を収容している筐体６は、左右にそれぞれ位置する筐体保持部５４の突条５１の上下に各々設けられ、図２に於いて左右２箇所ずつ、合計で４箇所設けられている。
【００１９】
前記筐体６が取り付けられた状態では、左側の筐体保持部５４に於いて、突条５１の上側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌと、突条５１の下側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌとが反射板５３の所定位置に略集合し、且つ右側の筐体保持部５４に於いて、突条５１の上側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌと、突条５１の下側に設けられた筐体６内のＬＥＤランプ７の光軸Ｌとが反射板５３の所定位置、例えば図２の集合箇所Ｆ或いは集合領域に略集合すると共に、左側と右側のＬＥＤランプ７の光軸Ｌの集合箇所Ｆ或いは集合領域が略同一位置になる構成である。換言すれば図２の左右４箇所に設置されたＬＥＤランプ７の４つの光軸Ｌ全てが反射板５３の所定位置の集合箇所Ｆ或いは集合領域に略集合するようになっており、本実施形態では弧状の反射板５３の中央の集合箇所Ｆに略集合している。
【００２０】
上記第２実施形態の照明器具１により、複数のＬＥＤランプ７の光軸Ｌを反射板５３上で複数のＬＥＤランプ７の光軸を集合箇所Ｆに略集合させ、照明器具１の照明光の光量をより増加することができると共に、前記反射板５３の略集合箇所や反射板５３のその他の位置の照明光の反射等により、例えば青色や黄色などのＬＥＤランプ７の照明光を混色し、色調の平均化を図って色ムラを無くし、色合いの均一な白色光等の一層良好な照明光を得ることができる。
【００２１】
尚、ＬＥＤランプ７の配置個数や配置形態や形状、反射板５３の形状、ＬＥＤランプ７と反射板５３の相対的な位置関係等は本発明の趣旨の範囲内で適宜であり、又、複数のＬＥＤランプ７の光軸が反射板５３上で略集合する箇所は１箇所若しくは複数箇所とすることが可能であり、前記複数箇所とする場合にはそれらの位置関係は略線状、略円形、対称位置、所要位置など適宜である。又、反射板５３上の光軸の略集合には、一致する場合に加え、例えば同一線上でずれた位置や、互いに近傍する位置になる等、概略集合するものであれば本発明に包含される。又、光軸が反射板５３上で集合箇所に集合しないＬＥＤランプ７を含むものも本発明に包含される。又、上記実施形態では照明器具１として天井灯の場合について説明したが、壁面灯、足下灯、スタンドライトなど適宜の照明器具とすることが可能である。
【００２２】
【発明の効果】
本発明のＬＥＤランプを光源とする照明器具を用いることにより、照明光の色ムラを無くし、均一な色合いの良好な照明光を得ることができると共に、所望方向への光量を増加して、光を有効利用した効率的な照明を行うことができるという格別な効果を奏することができる。また、照明光の色合いを均一化する技術の多様化に寄与する。
【図面の簡単な説明】
【図１】第１実施形態の照明器具を示す縦断側面図。
【図２】第２実施形態の照明器具を示す縦断側面図。
【符号の説明】
１ 照明器具
２ 収納部
５ 基体
５１ 突条
５２ 筐体取付部
５３ 反射板
６ 筐体
７ ＬＥＤランプ
８ ＬＥＤ基板
９ 板バネ
Ｃ 天井
Ｌ 光軸
Ｌ１ 所定強度指向角の光
Ｆ 光軸の集合箇所[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lighting device using an LED lamp as a light source, and more particularly to a lighting device capable of obtaining uniform illumination light without color unevenness.
[0002]
[Prior art]
In recent years, lighting fixtures using an LED lamp as a light source have attracted attention. For example, architectural lighting fixtures of an LED light source integrated with a building have been proposed, but the illumination light of the LED light source has high directivity, For example, since color unevenness occurs such as blue light in the center portion and yellow light in the peripheral portion, it is important to make the color of the illumination light uniform in the lighting equipment of the LED light source.
[0003]
Japanese Patent Application Laid-Open No. H11-157572 discloses a technique for uniforming the color of illumination light of a lighting fixture using an LED light source. In Patent Literature 1, an LED lamp is disposed in a predetermined directional direction, a diffusion plate having fine irregularities formed on a surface thereof is provided in front of the LED lamp, and the color tone of illumination light of the LED lamp is provided by the diffusion plate. A lighting device that is substantially uniform is disclosed.
[0004]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-266606
[Problems to be solved by the invention]
By the way, in a lighting fixture, a variety of products is strongly required according to a design and a use, and accordingly, various technologies capable of making the color of illumination light uniform are keenly desired. It is also extremely important for a lighting device to be able to perform efficient lighting by increasing the amount of light.
[0006]
The present invention has been made in view of the above problems, and in a lighting device using an LED lamp as a light source, it is possible to eliminate uneven color of illumination light, obtain good illumination light having a uniform color tone, It is an object of the present invention to provide a lighting device capable of performing efficient lighting by increasing the number of lighting devices.
[0007]
[Means for Solving the Problems]
The lighting fixture of the present invention includes at least a plurality of LED lamps arranged so that the optical axis directions are at different angles, and a reflector, and the optical axes of the plurality of LED lamps are substantially gathered by the reflector. It is characterized by having a configuration. For example, the direction of the optical axis of the first LED lamp and the direction of the optical axis of the second LED lamp disposed near the first LED lamp are made different, and the optical axes of the first and second LED lamps are reflected by a reflector. A first LED lamp, and a third LED lamp corresponding to the first LED lamp and provided at a different optical axis angle at symmetrical positions with respect to the reflector, The optical axes of the first and third LED lamps are substantially gathered on the reflector. The optical axes of the plurality of LED lamps are substantially gathered on the reflector, so that the amount of illumination light of the lighting fixture can be increased. Good illumination light such as white light having a uniform hue can be obtained.
[0008]
Further, the lighting fixture of the present invention includes a first LED lamp, a second LED lamp disposed near the first LED lamp, and a first LED lamp symmetrically positioned with respect to the reflector. And a fourth LED lamp provided at an optical axis angle corresponding to the second LED lamp, the light of the first to fourth LED lamps being provided at an optical axis angle corresponding to the second LED lamp. It is characterized in that the axes are substantially assembled by the reflection plate. With the above configuration, effects such as an increase in the amount of illumination light of the illumination device and a uniform color tone of the illumination light can be more remarkably exhibited.
[0009]
In addition, when the plurality of LED lamps are arranged in the longitudinal direction, and a lighting fixture in which the substantially gathered portions of the optical axes are arranged substantially in a line, it can be applied to a slender indoor lamp or the like, which is preferable. In addition, a configuration in which the optical axes of a plurality of LED lamps are gathered at substantially one point may be used for a spotlight or the like. Further, the tip of the optical axis may be arranged in a substantially linear manner in parallel with the reflecting plate, and a substantially linear group may be formed. In addition, the number of LED lamps is appropriate as long as it is two or more, such as three, four, five, and six.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a lighting fixture of the present invention will be described based on a specific embodiment in the drawings. FIG. 1 is a vertical sectional side view showing the lighting fixture of the first embodiment.
[0011]
As shown in FIG. 1, the lighting fixture 1 of the first embodiment is a ceiling light embedded in a ceiling C and provided with a substantially elongated box-shaped storage section 2 whose longitudinal direction is perpendicular to the paper surface. The storage section 2 is embedded in the ceiling C with the opening facing downward, fixed with bolts 3 and nuts 4 and attached. Inside the storage part 2, a slender base 5 similarly having a longitudinal direction perpendicular to the paper surface is provided, and the base 5 has a substantially groove-like shape with a substantially mountain-shaped projection or ridge 51 interposed therebetween. The housing mounting portions 52 are provided, and the upper surface thereof is a substantially arc-shaped reflecting plate 53.
[0012]
The housing 6 has a substantially elongated box shape whose longitudinal direction is perpendicular to the paper surface, and is used for wiring and the like at a position below the mounting plate 62 with one of the bottom plate 61 and the mounting plate 62 provided at a substantially intermediate position therebetween. It has a side plate 64 in which an opening 63 is formed, and a side plate 65 having no opening in the other side. A substantially concave groove-shaped portion surrounded by the mounting plate 62 and the side plates 64 and 65 is a housing portion of the LED lamp 7, and is disposed on an elongated plate LED substrate 8 having a longitudinal direction perpendicular to the paper surface. A plurality of LED lamps 7 are arranged side by side in the direction. The LED lamps 7 are mounted on a mounting plate 62 with an LED substrate 8 interposed therebetween, and are provided toward the opening of the housing 6. Each LED lamp 7 is turned on / off by the wiring and circuit structure omitted in the figure.
[0013]
The housings 6 accommodating the LED lamps 7 are housed in the housing mounting portions 52, respectively, and are provided vertically near the ridges 51. The housings 6 are provided on the side plate 65 having no opening. The outer side surface is in contact with the side surface of the ridge 51 and is fixed to the housing mounting portion 52 with a mounting tool not shown. In a state where the housing 6 is attached, the optical axis L of the LED lamp 7 in the housing 6 provided on the upper side of the ridge 51 is substantially the same as the position of the upper LED lamp 7, and The optical axis L of the LED lamp 7 in the housing 6 provided on the side is substantially gathered at a predetermined position of the reflection plate 53, for example, at the gathering point F or the gathering area in FIG. 1, in other words. The LED lamp 7 above the projection 51 and the LED lamp 7 below the projection 51 are arranged at a predetermined angle at which the optical axis L substantially gathers at the predetermined position. Further, a plurality of sets of the upper LED lamp 7 and the lower LED lamp 7 are juxtaposed in the longitudinal direction perpendicular to the plane of the paper, and the substantially gathered portions of the optical axes L are arranged substantially linearly. L1 is light having a predetermined brightness intensity directivity angle with respect to the front optical axis L having the maximum brightness intensity, such as light having a half-width of the directivity angle.
[0014]
Further, a leaf spring 9 is disposed outside the side plate 64 where the opening 63 of the housing 6 is formed substantially along the outer surface of the side plate 64, and the leaf spring 9 moves the housing 6 in the direction of the ridge 51. , The outer surface of the side plate 65 of the housing 6 is pressed against the side surface of the ridge 51 and pressed against the side surface of the ridge 51. A heat radiation path having a high heat radiation property to the body 6, the base 5, and the storage section 2 is configured to extend the life of the LED lamp 7 or the lighting device 1. The base 5, the housing 6, and the housing 2 are made of a material having high heat dissipation such as aluminum.
[0015]
With the lighting fixture 1 of the first embodiment, the optical axes L of the plurality of LED lamps 7 are substantially gathered on the reflecting plate 53 at the gathering point F, and the illumination light of the lighting fixture 1 is The amount of light can be increased, and the illumination light of the LED lamp 7 such as blue or yellow is mixed due to the reflection of the illumination light at the substantially gathered portion of the reflection plate 53 and other positions of the reflection plate 53, and the color tone is changed. And uniform color tone can be eliminated to obtain good illumination light such as white light having a uniform hue.
[0016]
Next, a lighting fixture 1 according to a second embodiment of the present invention will be described. FIG. 2 is a vertical sectional side view showing a lighting fixture of the second embodiment. The basic configuration of the lighting fixture 1 according to the second embodiment that is not particularly mentioned is the same as that of the lighting fixture 1 according to the first embodiment.
[0017]
As shown in FIG. 2, the lighting fixture 1 according to the second embodiment is a ceiling light that is suspended from a ceiling and installed, and a substantially elongated box-shaped storage unit 2 is disposed with an opening facing downward, and a bolt is provided. 3 and a nut 4. The base member 5 provided in the storage part 2 has a substantially arc-shaped reflecting plate 53 and substantially mountain-shaped projections or ridges 51 disposed separately on the left and right sides of the reflecting plate 53, respectively. And a case holding portion 54 having a substantially groove-shaped case mounting portion 52 formed therein. The housing holding portion 54 is engaged with the end portion of the reflection plate 53 at a substantially upper portion, and the L-shaped portion protruding outward from the lower end is engaged with the L-shaped portion protruding inward of the storage portion 2. , Attached to the storage section 2.
[0018]
The configuration of the housing 6 and the configuration of the LED lamp 7, the LED board 8, and the leaf spring 9 are the same as those of the first embodiment, and the housings 6 housing the LED lamps 7 are housed in the housing mounting portions 52, respectively. Each housing 6 is fixed to the housing mounting portion 52 by contacting the outer surface of the side plate 65 with the side surface of the protrusion 51. The housings 6 accommodating the LED lamps 7 of the second embodiment are respectively provided above and below the ridges 51 of the housing holding portion 54 located on the left and right sides, and two places on the left and right sides in FIG. , Four locations in total.
[0019]
In a state where the housing 6 is attached, the optical axis L of the LED lamp 7 in the housing 6 provided on the upper side of the ridge 51 and the lower side of the ridge 51 in the left housing holding portion 54. The optical axis L of the LED lamp 7 in the housing 6 provided on the side is substantially gathered at a predetermined position of the reflection plate 53, and is provided above the protrusion 51 in the right housing holding portion 54. The optical axis L of the LED lamp 7 in the housing 6 and the optical axis L of the LED lamp 7 in the housing 6 provided below the ridge 51 are positioned at predetermined positions of the reflector 53, for example, as shown in FIG. In this configuration, the light sources L and the light-collecting area L of the LED lamps 7 on the left and right sides are substantially at the same position. In other words, all of the four optical axes L of the LED lamps 7 installed at the four right and left locations in FIG. In this case, the light is substantially gathered at the gathering point F at the center of the arc-shaped reflecting plate 53.
[0020]
With the lighting fixture 1 of the second embodiment, the optical axes L of the plurality of LED lamps 7 are substantially gathered at the gathering point F on the reflection plate 53, and the illumination light of the lighting fixture 1 is The amount of light can be further increased, and the illumination light of the LED lamp 7 such as blue or yellow is mixed by, for example, the reflection of the illumination light at the substantially gathered portion of the reflection plate 53 and other positions of the reflection plate 53, The color tone can be averaged to eliminate color unevenness, and more favorable illumination light such as white light having a uniform hue can be obtained.
[0021]
The number, arrangement and shape of the LED lamps 7, the shape of the reflector 53, the relative positional relationship between the LED lamp 7 and the reflector 53, and the like are appropriately determined within the scope of the present invention. The locations where the optical axes of the LED lamps 7 substantially gather on the reflection plate 53 may be one or more. When the plurality of locations are provided, their positional relationship is substantially linear or substantially circular. , A symmetric position, a required position, and the like. In addition, in the general set of optical axes on the reflection plate 53, in addition to the case where the optical axes coincide with each other, for example, those that roughly collect, such as a position shifted on the same line or a position close to each other, are included in the present invention. You. Further, the present invention also includes an LED lamp 7 whose optical axis does not gather at the gathering point on the reflection plate 53. Further, in the above-described embodiment, the case where a ceiling light is used as the lighting device 1 has been described. However, an appropriate lighting device such as a wall light, a foot light, and a stand light can be used.
[0022]
【The invention's effect】
By using a lighting device using the LED lamp of the present invention as a light source, color unevenness of the illumination light can be eliminated, good illumination light having a uniform color tone can be obtained, and the amount of light in a desired direction can be increased. An extraordinary effect can be achieved in that efficient illumination can be performed effectively using In addition, it contributes to diversification of technology for making the color of illumination light uniform.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view showing a lighting fixture of a first embodiment.
FIG. 2 is a longitudinal sectional side view showing a lighting device according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Illumination equipment 2 Storage part 5 Base 51 Protrusion 52 Case attaching part 53 Reflector 6 Case 7 LED lamp 8 LED substrate 9 Plate spring C Ceiling L Optical axis L1 Light F of predetermined intensity directivity angle Optical F
