JP4608708B2

JP4608708B2 - Light guide type lighting device

Info

Publication number: JP4608708B2
Application number: JP23489099A
Authority: JP
Inventors: 豊菅谷
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 1999-08-23
Filing date: 1999-08-23
Publication date: 2011-01-12
Anticipated expiration: 2019-08-23
Also published as: JP2001060071A

Description

【０００１】
【発明の属する技術分野】
この発明は、導光板を介して照射する導光式照明装置に関するものである。
【０００２】
【従来の技術】
従来例を図１１に示す。すなわち、この導光式照明装置は、光源７０を覆う器具本体７１の一面の開口７２から器具本体７１内に導光板７３の端面７４を導入して光源７０に臨ませ導光板７３の前面に透明カバー７５を配置している。
【０００３】
光源７０の光は導光板７３の端面７４に入射し、導光板７３の前面で屈折して透明カバーパネル７５を透過し、前方に出光する。
【０００４】
【発明が解決しようとする課題】
しかし、この導光式照明装置は、矢印Ａに示すように透明カバーパネル７５の端面から入射した光が前面より出光するという問題があった。すなわち、透明カバーパネル７５に光源７０から入光すると、透明カバーパネル７５も導光板７３と同様に光源７０の光を導光し、この光が透明カバーパネル７５の傷や汚れに達すると、そこで拡散し、それらが目立ち美観を損ねる。
【０００５】
また器具本体７１の一部を構成するカバー７１ａの内面を光源７０の光が矢印Ｂに示すように反射し、さらに透明カバーパネル７５の前面を反射してカバー７１ａと透明カバーパネル７５の隙間７７から外部に漏れていた。
【０００６】
したがって、この発明の目的は、簡単な構造で透明カバーパネルに入光する光を制限し、透明カバーパネルの傷や汚れが目立たない導光式照明装置を提供することである。
【０００７】
【課題を解決するための手段】
請求項１記載の導光式照明装置は、平板状であって上下両端部より裏面側に突出する略Ｕ字形の光源装着部を有し前記光源装着部が壁面に取付けられる器具本体と、前記光源装着部の内側に配置されてランプを装着するランプソケットと、前記光源装着部が前記壁面に取付けられた状態で前記壁面から離れる前記器具本体の裏面に設けられた端子台と、前記器具本体の表面に設けられて前記ランプに対向する端面より前記ランプの光を入射し前面より透過する導光板と、この導光板の前面に配置された透明カバーパネルと、この透明カバーパネルの光源側端面を遮光する遮光部材と、前記導光板の両側に配置されたマグネットと、前記光源装着部および前記マグネットを含めて前記器具本体の周縁部の前面側に被さる枠状であって前記マグネットに吸着されるカバーとを備えたものである。
【０００８】
請求項１記載の導光式照明装置によれば、光源より透明カバーパネルに入光する光が遮光部材により遮光され、簡単な構成により透明カバーパネルに付いた傷や汚れが光って目立つことを防止できる。
【０００９】
請求項２記載の導光式照明装置は、請求項１において、前記遮光部材が低反射材料より形成されているものである。
【００１０】
請求項２記載の導光式照明装置によれば、請求項１と同様な効果のほか、遮光部材の反射光が低減され、器具本体の開口からの漏れ光を少なくできるので、器具本体で覆われる導光板および透明カバーパネルの長さを短くでき照明装置の小型化ができる。
【００１１】
請求項３記載の導光式照明装置は、請求項１において、前記遮光部材が前記導光板の上面に略密接するとともに前記光源と前記透明カバーパネルとの間に介在しているものである。
【００１２】
請求項３記載の導光式照明装置によれば、請求項１と同様な効果がある。
【００１３】
請求項４記載の導光式照明装置は、請求項１において、前記遮光部材が不透過性材料からなり、前記透明カバーパネルの光源側端面に接着されるものである。
【００１４】
請求項４記載の導光式照明装置によれば、請求項１と同様な効果がある。
【００１５】
請求項５記載の導光式照明装置は、請求項１において、遮光部材が不透過性材料からなり、前記導光板の上部に設置されるものである。
【００１６】
請求項５記載の導光式照明装置は、請求項１と同様な効果がある。
【００１７】
請求項６記載の導光式照明装置は、請求項１において、前記光源の前記導光板と反対側に不透過性材料のシートを配置しその一側を前記導光板と前記透明カバーパネルの間に挿入したものである。
【００１８】
請求項６記載の導光式照明装置によれば、請求項１と同様な効果のほか、器具本体の内面を反射して開口より漏れる光を防止することができる。
【００１９】
【発明の実施の形態】
この発明の第１の実施の形態を図１から図３により説明する。すなわち、この導光式照明装置は、器具本体１と、導光板２と、透明カバーパネル３とを有する。
【００２０】
器具本体１は、光源４を覆い光源４を出光させる開口５を設けている。実施の形態の器具本体１は図２および図３に示すように上下両端部に光源装着部１０を設けた平板状であって、光源装着部１０を含めて器具本体１の周縁部を枠状のカバー１１で被せている。器具本体１の両端部は略Ｕ字形に折曲され、その内部の両端にソケット台１２が取付けられ、ソケット台１２にランプソケット１３が設けられている。光源４は直管蛍光ランプであり、ランプソケット１３に装着される。器具本体１より出光させる開口５は器具本体１と枠状のカバー６により形成されてカバー６の内周に沿って内周に向いている。１５は器具本体１の裏面に設けられた端子台、１６は器具本体１の両側に設けられてカバー１１を吸着するマグネット、１７は取付ねじである。
【００２１】
導光板２は、開口５に端面が導入されて端面２ａより光を入射し前面２ｂより透過する。実施の形態の導光板２は、例えば透明材料により形成され、器具本体１の両端部の間の前面に反射シート７を介して取付けられている。したがって、導光板２に入射した光は反射シート７側には抜け出ることがなく反射シート１７で反射されて前面側に透過する。
【００２２】
透明カバーパネル３は、導光板２の前面に配置されている。実施の形態では導光板２の前面に、表面にフィルムやポスター等の表示物のある拡散シート８を介して透明カバーパネル３を積み重ねている。また透明カバーパネル３の幅は導光板２の幅より若干短くして、導光板２上に遮光部材９が載るようにしている。
【００２３】
遮光部材９は、透明カバーパネル３の光源側端面３ａを遮光する。実施の形態は不導光性材料すなわち不透光性材料を用い、導光板２の拡散シート８の上に設けられ、透明カバーパネル３の端面３ａに接着している。
【００２４】
この導光式照明装置は、器具本体１のランプソケット１３に光源４を装着し、器具本体１にカバー６を被せ、光源４を点灯すると、開口５側に出る光が導光板２の端面２ａに入射し、導光板２の前面２ｂより出光し、拡散シート８および透明カバーパネル３を透してカバー６の中央開口より外部に出る。光源４の光のうち透明カバーパネル３の端面３ａに入射しようとする光は遮光部材９に当たって入射が遮られる。このため、透明カバーパネル３の傷や汚れ等が目立つのを防止することができる。
【００２５】
この発明の第２の実施の形態を図４に示す。すなわち、この照明装置は、第１の実施の形態において、遮光部材９を導光体２の上に拡散シート８を介さず直接設置して略密接し、かつ光源４と透明カバーパネル３の端面３ａとの間に介在している。その他は第１の実施の形態と同様である。
【００２６】
この発明の第３の実施の形態を図５に示す。すなわち、この照明装置は、第１の実施の形態において、遮光部材９を不透過性材料により形成し、カバー６に納る範囲内すなわち透明カバーパネル３の板厚以上でカバー６の内面に接近してカバー６に当たらない高さに大きくとっている。このため、カバー６と透明カバーパネル３との隙間５ａから漏れていた光も外部に出るまでの反射回数が増えるため減衰し、このためカバー６と透明カバーパネル３との隙間５ａからの光漏れも軽減できる。その他は第１の実施の形態と同様である。
【００２７】
この発明の第４の実施の形態を図６に示す。すなわち、この照明装置は、第２の実施の形態において、遮光部材９を不透過性材料により形成し、カバー６に納る範囲内すなわち透明カバーパネル３の板厚以上でカバー６の内面に接近してカバー６に当たらない高さに大きくとっている。このため第３の実施の形態と同様な効果があるほか、その他は第２の実施の形態と同様である。
【００２８】
この発明の第５の実施の形態を図７に示す。すなわち、この照明装置は、第３の実施の形態において、遮光部材９に不透過性でかつ低反射の材料を用いている。また遮光部材９が開口５の近傍に接近して光が漏れる隙間５ａが小さくなるようにしている。このため、遮光部材９の反射光が低減され、器具本体１の開口からの漏れ光を少なくできるので、反射による減衰がさらに加速され、カバー６で覆われた導光体２および透明カバーパネル３の長さを短くでき、照明装置の小型化が図れる。その他は第３の実施の形態と同様である。
【００２９】
この発明の第６の実施の形態を図８に示す。すなわち、この照明装置は、第４の実施の形態において、遮光部材９に不透過性でかつ低反射の材料を用いている。また遮光部材９が開口５の近傍に接近して光が漏れる隙間５ａが小さくなるようにしている。このため、第５の実施の形態と同様な効果があるほか、その他は第４の実施の形態と同様である。
【００３０】
この発明の第７の実施の形態を図９に示す。すなわち、この照明装置は、第１の実施の形態の遮光部材に代えて、可撓性または柔軟性の不透過材料のシート２０例えばランプ反射シートを用いて光源４の導光板２と反対側とカバー６の間に配置し、その一側を透明カバーパネル３と導光板２の間に挿入し、他側を器具本体１の内面に密接固定している。その他は第１の実施の形態と同様である。
【００３１】
第７の実施の形態によれば、光源４の光は導光板２の端面２ａに入射できるが、シート２０により透明カバーパネル３の端面３ａおよびカバー６の内面を反射しない。このため、透明カバーパネル３の傷等が表れず、またカバー６の内面を反射した光が開口５より漏れることがない。
【００３２】
この発明の第８の実施の形態を図１０に示す。すなわち、この照明装置は、第１の実施の形態の遮光部材に代えて、遮光部材２１を透明カバーパネル３の入光側端面３ａからカバー６の内面に渡って配設している。実施の形態では不透明材料を用いて断面逆Ｌ字形に形成し、その一片をカバー６の内面に取付け、他片により透明カバーパネル３の端面３ａを覆っている。このため、透明カバーパネル３への入射光を防止することができるとともに、カバー６の内面の反射光が開口５より漏れるのを防止することができる。なお遮光部材２１は器具本体１またはソケット台１２に取付けることができる。
【００３３】
【発明の効果】
請求項１記載の導光式照明装置によれば、光源より透明カバーパネルに入光する光が遮光部材により遮光され、簡単な構成により透明カバーパネルに付いた傷や汚れが光って目立つことを防止できる。
【００３４】
請求項２記載の導光式照明装置によれば、請求項１と同様な効果のほか、遮光部材の反射光が低減され、器具本体の開口からの漏れ光を少なくできるので、器具本体で覆われる導光板および透明カバーパネルの長さを短くでき照明装置の小型化ができる。
【００３５】
請求項３記載の導光式照明装置によれば、請求項１と同様な効果がある。
【００３６】
請求項４記載の導光式照明装置によれば、請求項１と同様な効果がある。
【００３７】
請求項５記載の導光式照明装置は、請求項１と同様な効果がある。
【００３８】
請求項６記載の導光式照明装置によれば、請求項１と同様な効果のほか、器具本体の内面を反射して開口より漏れる光を防止することができる。
【図面の簡単な説明】
【図１】この発明の第１の実施の形態の要部断面図である。
【図２】器具本体を示し、（ａ）は正面図、（ｂ）は側面図、（ｃ）は底面図である。
【図３】器具本体の分解斜視図である。
【図４】第２の実施の形態の要部断面図である。
【図５】第３の実施の形態の要部断面図である。
【図６】第４の実施の形態の要部断面図である。
【図７】第５の実施の形態の要部断面図である。
【図８】第６の実施の形態の要部断面図である。
【図９】第７の実施の形態の要部断面図である。
【図１０】第８の実施の形態の要部断面図である。
【図１１】従来例の要部断面図である。
【符号の説明】
１器具本体
２導光板
２ａ端面
２ｂ前面
３透明カバーパネル
３ａ端面
４光源
５開口
６カバー
７反射シート
８拡散シート
９遮光部材
２０シート
２１遮光部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light guide type illumination device that irradiates through a light guide plate.
[0002]
[Prior art]
A conventional example is shown in FIG . That is, in this light guide type illuminating device, the end surface 74 of the light guide plate 73 is introduced into the instrument main body 71 from the opening 72 on one surface of the instrument main body 71 covering the light source 70 so as to face the light source 70 and transparent on the front surface of the light guide plate 73. A cover 75 is disposed.
[0003]
The light from the light source 70 enters the end surface 74 of the light guide plate 73, refracts at the front surface of the light guide plate 73, passes through the transparent cover panel 75, and exits forward.
[0004]
[Problems to be solved by the invention]
However, this light guide type illumination device has a problem that light incident from the end face of the transparent cover panel 75 is emitted from the front surface as indicated by an arrow A. That is, when light enters the transparent cover panel 75 from the light source 70, the transparent cover panel 75 also guides the light from the light source 70 in the same manner as the light guide plate 73, and when this light reaches the scratches or dirt on the transparent cover panel 75, Spread and they stand out and detract from aesthetics.
[0005]
Further, the light from the light source 70 reflects the inner surface of the cover 71a constituting a part of the instrument main body 71 as indicated by the arrow B, and further reflects the front surface of the transparent cover panel 75 to allow a gap 77 between the cover 71a and the transparent cover panel 75. Leaked from the outside.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a light guide type illumination device that limits light entering a transparent cover panel with a simple structure and in which scratches and dirt on the transparent cover panel are not noticeable.
[0007]
[Means for Solving the Problems]
Light type illuminating apparatus comprising: a fixture main body mounted on the light source mounting portion has a light source mounting portion of substantially U-shaped projecting to the rear surface side of the upper and lower end portions a plate-shaped wall, said A lamp socket which is disposed inside the light source mounting portion and mounts a lamp; a terminal block provided on the back surface of the device main body which is separated from the wall surface in a state where the light source mounting portion is attached to the wall surface; and the device main body a light guide plate that transmits from incident front the light of the lamp from the end face opposite to the lamp provided on the surface of a transparent cover panel disposed in front of the light guide plate, the light source side end face of the transparent cover panel a light shielding member that shields a magnet disposed on both sides of the light guide plate, the magnetic a frame shape that covers the front side of the peripheral edge portion of the instrument body, including the light source mounting portion and the magnet It is obtained by a cover which is adsorbed on bets.
[0008]
According to the light guide type illumination device of the first aspect, the light that enters the transparent cover panel from the light source is shielded by the light shielding member, and the scratches and dirt on the transparent cover panel are shining and conspicuous with a simple configuration. Can be prevented.
[0009]
A light guide type illumination device according to a second aspect is the light guiding type illumination device according to the first aspect, wherein the light shielding member is made of a low reflection material.
[0010]
According to the light guide type illuminating device of the second aspect, in addition to the same effect as the first aspect, the reflected light of the light shielding member is reduced and the leakage light from the opening of the instrument main body can be reduced. The length of the light guide plate and the transparent cover panel can be shortened, and the lighting device can be miniaturized.
[0011]
A light guide type illumination device according to a third aspect is the light guide type illumination device according to the first aspect, wherein the light shielding member is in close contact with the upper surface of the light guide plate and is interposed between the light source and the transparent cover panel.
[0012]
According to the light guide type illumination device of the third aspect, the same effect as that of the first aspect is obtained.
[0013]
A light guide type illumination device according to a fourth aspect is the light guide type illumination device according to the first aspect, wherein the light shielding member is made of an impermeable material and is adhered to a light source side end surface of the transparent cover panel.
[0014]
According to the light guide type illumination device of the fourth aspect, the same effect as the first aspect is obtained.
[0015]
A light guide type illumination device according to a fifth aspect is the light guide type illuminating device according to the first aspect, wherein the light shielding member is made of an impermeable material and is installed on the light guide plate.
[0016]
The light guide type illumination device according to the fifth aspect has the same effect as that of the first aspect.
[0017]
The light guide type illuminating device according to claim 6 is the light guide type illuminating device according to claim 1, wherein a sheet of an impermeable material is disposed on the opposite side of the light source to the light guide plate, and one side thereof is disposed between the light guide plate and the transparent cover panel. It is inserted in.
[0018]
According to the light guide type illumination device of the sixth aspect, in addition to the same effect as that of the first aspect, it is possible to prevent light leaking from the opening by reflecting the inner surface of the instrument main body.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. That is, the light guide type illumination device has a fixture body 1, a light guide plate 2, and a transparent cover panel 3.
[0020]
The instrument body 1 has an opening 5 that covers the light source 4 and emits the light source 4. 2 and 3, the instrument main body 1 according to the embodiment has a flat plate shape in which light source mounting portions 10 are provided at both upper and lower ends, and the peripheral portion of the instrument main body 1 including the light source mounting portion 10 has a frame shape. The cover 11 is covered. Both end portions of the instrument main body 1 are bent into a substantially U shape, socket bases 12 are attached to both ends inside thereof, and lamp sockets 13 are provided on the socket base 12. The light source 4 is a straight tube fluorescent lamp and is attached to the lamp socket 13. An opening 5 that emits light from the instrument body 1 is formed by the instrument body 1 and a frame-shaped cover 6, and faces the inner periphery along the inner periphery of the cover 6. Reference numeral 15 denotes a terminal block provided on the back surface of the instrument body 1, 16 denotes a magnet provided on both sides of the instrument body 1 to attract the cover 11, and 17 denotes a mounting screw.
[0021]
The light guide plate 2 has an end surface introduced into the opening 5, enters light from the end surface 2 a, and transmits light from the front surface 2 b. The light guide plate 2 of the embodiment is formed of, for example, a transparent material, and is attached to the front surface between both end portions of the instrument body 1 via a reflection sheet 7. Therefore, the light incident on the light guide plate 2 does not escape to the reflection sheet 7 side but is reflected by the reflection sheet 17 and transmitted to the front side.
[0022]
The transparent cover panel 3 is disposed on the front surface of the light guide plate 2. In the embodiment, the transparent cover panel 3 is stacked on the front surface of the light guide plate 2 via a diffusion sheet 8 having a display object such as a film or a poster on the surface. The width of the transparent cover panel 3 is slightly shorter than the width of the light guide plate 2 so that the light shielding member 9 is placed on the light guide plate 2.
[0023]
The light shielding member 9 shields the light source side end surface 3 a of the transparent cover panel 3. The embodiment uses a non-light-guide material, that is, a light-transmitting material, is provided on the diffusion sheet 8 of the light guide plate 2, and is bonded to the end surface 3 a of the transparent cover panel 3.
[0024]
In this light guide type illuminating device, when the light source 4 is mounted on the lamp socket 13 of the fixture body 1, the cover 6 is put on the fixture body 1, and the light source 4 is turned on, the light emitted to the opening 5 side is the end face 2 a of the light guide plate 2. The light is emitted from the front surface 2 b of the light guide plate 2, passes through the diffusion sheet 8 and the transparent cover panel 3, and exits from the central opening of the cover 6. Of the light from the light source 4, the light that attempts to enter the end surface 3 a of the transparent cover panel 3 strikes the light shielding member 9 and is blocked from entering. For this reason, it is possible to prevent the transparent cover panel 3 from being conspicuously scratched or dirty.
[0025]
A second embodiment of the present invention is shown in FIG. That is, in this lighting device, in the first embodiment, the light shielding member 9 is directly installed on the light guide 2 without the diffusion sheet 8 interposed therebetween, and the light source 4 and the end face of the transparent cover panel 3 are in close contact with each other. 3a. Others are the same as in the first embodiment.
[0026]
A third embodiment of the present invention is shown in FIG. That is, in this lighting device, in the first embodiment, the light shielding member 9 is made of an impermeable material and approaches the inner surface of the cover 6 within the range that can be accommodated in the cover 6, that is, the thickness of the transparent cover panel 3 or more. Therefore, the height is set so as not to hit the cover 6. For this reason, the light leaking from the gap 5a between the cover 6 and the transparent cover panel 3 is attenuated due to an increase in the number of reflections until it goes out, so that light leakage from the gap 5a between the cover 6 and the transparent cover panel 3 occurs. Can also be reduced. Others are the same as in the first embodiment.
[0027]
A fourth embodiment of the present invention is shown in FIG. That is, in this second embodiment, in the second embodiment, the light shielding member 9 is made of an impermeable material, and approaches the inner surface of the cover 6 within the range that can be accommodated in the cover 6, that is, the thickness of the transparent cover panel 3 or more. Therefore, the height is set so as not to hit the cover 6. For this reason, in addition to the same effects as those of the third embodiment, the others are the same as those of the second embodiment.
[0028]
A fifth embodiment of the present invention is shown in FIG. That is, in this third embodiment, the illumination device uses an opaque material and a low reflection material for the light shielding member 9. The light shielding member 9 approaches the vicinity of the opening 5 so that the gap 5a through which light leaks becomes small. For this reason, since the reflected light of the light shielding member 9 is reduced and the leakage light from the opening of the instrument body 1 can be reduced, the attenuation due to the reflection is further accelerated, and the light guide 2 and the transparent cover panel 3 covered with the cover 6. Can be shortened, and the size of the lighting device can be reduced. Others are the same as in the third embodiment.
[0029]
A sixth embodiment of the present invention is shown in FIG. In other words, in the fourth embodiment, this illuminating device uses an opaque material and a low reflection material for the light shielding member 9. The light shielding member 9 approaches the vicinity of the opening 5 so that the gap 5a through which light leaks becomes small. For this reason, in addition to the same effects as in the fifth embodiment, the rest is the same as in the fourth embodiment.
[0030]
A seventh embodiment of the present invention is shown in FIG. That is, this illuminating device uses a sheet 20 of a flexible or flexible opaque material, for example, a lamp reflecting sheet, instead of the light shielding member of the first embodiment, and the light source 4 opposite to the light guide plate 2. It arrange | positions between the covers 6, the one side is inserted between the transparent cover panel 3 and the light-guide plate 2, and the other side is fixed to the inner surface of the instrument main body 1 closely. Others are the same as in the first embodiment.
[0031]
According to the seventh embodiment, the light from the light source 4 can enter the end surface 2 a of the light guide plate 2, but the sheet 20 does not reflect the end surface 3 a of the transparent cover panel 3 and the inner surface of the cover 6. For this reason, scratches or the like of the transparent cover panel 3 do not appear, and light reflected from the inner surface of the cover 6 does not leak from the opening 5.
[0032]
An eighth embodiment of the invention is shown in FIG. That is, in this illuminating device, instead of the light shielding member of the first embodiment, the light shielding member 21 is arranged from the light incident side end surface 3 a of the transparent cover panel 3 to the inner surface of the cover 6. In the embodiment, an opaque material is used to form an inverted L-shaped cross section, one piece is attached to the inner surface of the cover 6, and the end surface 3 a of the transparent cover panel 3 is covered with the other piece. For this reason, incident light to the transparent cover panel 3 can be prevented, and reflected light from the inner surface of the cover 6 can be prevented from leaking from the opening 5. The light shielding member 21 can be attached to the instrument body 1 or the socket base 12.
[0033]
【The invention's effect】
According to the light guide type illumination device of the first aspect, the light that enters the transparent cover panel from the light source is shielded by the light shielding member, and the scratches and dirt on the transparent cover panel are shining and conspicuous with a simple configuration. Can be prevented.
[0034]
According to the light guide type illuminating device of the second aspect, in addition to the same effect as the first aspect, the reflected light of the light shielding member is reduced and the leakage light from the opening of the instrument main body can be reduced. The length of the light guide plate and the transparent cover panel can be shortened, and the lighting device can be miniaturized.
[0035]
According to the light guide type illumination device of the third aspect, the same effect as that of the first aspect is obtained.
[0036]
According to the light guide type illumination device of the fourth aspect, the same effect as the first aspect is obtained.
[0037]
The light guide type illumination device according to the fifth aspect has the same effect as that of the first aspect.
[0038]
According to the light guide type illumination device of the sixth aspect, in addition to the same effect as that of the first aspect, it is possible to prevent light leaking from the opening by reflecting the inner surface of the instrument main body.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part of a first embodiment of the present invention.
2A is a front view, FIG. 2B is a side view, and FIG. 2C is a bottom view.
FIG. 3 is an exploded perspective view of the instrument body.
FIG. 4 is a cross-sectional view of a main part of a second embodiment.
FIG. 5 is a cross-sectional view of main parts of a third embodiment.
FIG. 6 is a cross-sectional view of main parts of a fourth embodiment.
FIG. 7 is a cross-sectional view of main parts of a fifth embodiment.
FIG. 8 is a cross-sectional view of main parts of a sixth embodiment.
FIG. 9 is a cross-sectional view of main parts of a seventh embodiment.
FIG. 10 is a cross-sectional view of main parts of an eighth embodiment.
FIG. 11 is a cross-sectional view of a main part of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus body 2 Light-guide plate 2a End surface 2b Front surface 3 Transparent cover panel 3a End surface 4 Light source 5 Opening 6 Cover 7 Reflection sheet 8 Diffusion sheet 9 Light shielding member 20 Sheet 21 Light shielding member

Claims

A flat plate-shaped light source mounting part that protrudes from the upper and lower ends toward the back side, and the light source mounting part is mounted on the wall surface, and the lamp is mounted inside the light source mounting part. A lamp socket, a terminal block provided on the back surface of the instrument main body that is separated from the wall surface in a state where the light source mounting portion is attached to the wall surface, and an end surface that is provided on the surface of the instrument main body and faces the lamp a light guide plate that transmits an entrance frontal more light of the lamp, and a transparent cover panel disposed in front of the light guide plate, a light blocking member for blocking the light source side end face of the transparent cover panels, each side of the light guide plate a magnet disposed, and a cover which is attracted to the magnet to a frame shape that covers the front side of the peripheral edge portion of the instrument body, including the light source mounting portion and the magnet Optical type lighting device.

The light guide type illumination device according to claim 1, wherein the light shielding member is formed of a low reflection material.

The light guide type illumination device according to claim 1, wherein the light shielding member is substantially in close contact with an upper surface of the light guide plate and is interposed between the light source and the transparent cover panel.

The light guide type illumination device according to claim 1, wherein the light shielding member is made of an impermeable material and is adhered to a light source side end surface of the transparent cover panel.

The light guide type illuminating device according to claim 1, wherein the light shielding member is made of an impermeable material, and is installed on the light guide plate.

The light guide type illuminating device according to claim 1, wherein a sheet of an impermeable material is disposed on the light source opposite to the light guide plate, and one side thereof is inserted between the light guide plate and the transparent cover panel.