JPH0624736Y2 - Instrument lighting equipment - Google Patents
Instrument lighting equipmentInfo
- Publication number
- JPH0624736Y2 JPH0624736Y2 JP1987155733U JP15573387U JPH0624736Y2 JP H0624736 Y2 JPH0624736 Y2 JP H0624736Y2 JP 1987155733 U JP1987155733 U JP 1987155733U JP 15573387 U JP15573387 U JP 15573387U JP H0624736 Y2 JPH0624736 Y2 JP H0624736Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- dial
- cover
- guide plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Details Of Measuring And Other Instruments (AREA)
- Details Of Measuring Devices (AREA)
Description
【考案の詳細な説明】 [考案の目的] (産業上の利用分野) この考案は、例えば自動車のフロントパネルに装着され
るような計器の照明装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to an illuminating device for an instrument mounted on, for example, a front panel of an automobile.
(従来の技術) 本出願人は、先にこの種の照明装置として、例えば第4
図に示すように構成したものを提案している。この照明
装置によると、指針1の駆動部2の側部に光源(照明電
球)3を配置して、透明あるいは半透明の文字板4の目
盛、文字の印刷部分4aに前記光源3の光3aを直接照
射することにより比較的明るく照明する一方、また光源
3の上方近傍に光導板5の受光部5aを配置して、光導
板5によって光源3の他の光3bを指針1の基部1aに
導くことにより指針1を発光させている。(Prior Art) The applicant of the present invention has previously described, as a lighting device of this type, for example, a fourth lighting device.
We propose the one configured as shown in the figure. According to this illuminating device, the light source (illuminating light bulb) 3 is arranged on the side of the drive unit 2 of the pointer 1, and the light 3a of the light source 3 is placed on the scale or the printed portion 4a of the transparent or semitransparent dial plate 4. While illuminating relatively brightly by directly irradiating, the light receiving portion 5a of the light guide plate 5 is arranged near the upper part of the light source 3, and the light guide plate 5 allows the other light 3b of the light source 3 to reach the base portion 1a of the pointer 1. The pointer 1 is made to emit light by being guided.
ここで、文字、目盛等の印刷部分4aは光源3からの光
3a(直射光)により照明されているため、印刷部分4
aのうち光源3からの最短距離にある部分(光源3の真
上位置部分)と比較的離れた他の部分とではどうしても
明るさの差が大きく、明るさにむらが生じてしまう。Here, since the printed portion 4a such as characters and scales is illuminated by the light 3a (direct light) from the light source 3, the printed portion 4a
The difference in brightness is inevitably large between the part of a that is the shortest distance from the light source 3 (the part directly above the light source 3) and the part that is relatively far away, and uneven brightness occurs.
そこで、光源3と印刷部分4aとの間に位置して文字板
4への光3aを減少させる半円弧状の減光カバー6を、
光導板5の受光部5aに一体に形成している。減光カバ
ー6の表面6a、裏面6bには、微細な凹凸を形成する
等して減光処理が施されている。Therefore, a semicircular dimming cover 6 that is located between the light source 3 and the printed portion 4a and reduces the light 3a to the dial 4 is provided.
It is formed integrally with the light receiving portion 5a of the light guide plate 5. The front surface 6a and the back surface 6b of the light-reducing cover 6 are subjected to light-reducing treatment by forming fine irregularities.
このようにすると、光源3からの光3aは減光カバー6
を透過する過程で減少し、光源3の真上の印刷部分4a
であっても極端に明るく照明されるようなことがなくな
る。また、文字板4の裏面に透過光を弱める目的で半透
明膜を印刷するような場合に比して、製造コストを低く
抑えることが可能となる。In this way, the light 3a from the light source 3 is reflected by the dimming cover 6
Is reduced in the process of transmitting light, and the printed portion 4a directly above the light source 3 is
However, it will not be illuminated extremely brightly. Further, as compared with the case where a semitransparent film is printed on the back surface of the dial plate 4 for the purpose of weakening transmitted light, the manufacturing cost can be kept low.
(考案が解決しようとする問題点) しかしながら、上記従来の照明装置においては、第5図
に示すように、減光カバー6の円弧中心(曲率中心)に
光源3を配置しているため、光源3から発した光が減光
カバー6を透過後もそのまま直進して文字板4に達する
ことになる。したがって、光源3の真上の文字板4の部
分と、その回りの部分との明暗差が改善されることがな
く、充分な効果を上げることができなかった。(Problems to be Solved by the Invention) However, in the above conventional lighting device, as shown in FIG. 5, the light source 3 is arranged at the arc center (curvature center) of the dimming cover 6, so that the light source is Even after the light emitted from 3 passes through the dimming cover 6, it goes straight and reaches the dial 4. Therefore, the difference in brightness between the part of the dial plate 4 just above the light source 3 and the surrounding part is not improved, and a sufficient effect cannot be obtained.
この考案は上記従来技術の問題点を解決するためになさ
れたもので、その目的とするところは、光源からの光を
より均一に文字板に当てることにより、文字板をより均
等に照明することのできる計器の照明装置を提供するこ
とである。The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to illuminate a dial more evenly by applying light from a light source to the dial more evenly. It is an object of the present invention to provide an illuminating device for measuring instruments.
[考案の構成] (問題点を解決するための手段) 上記目的を達成するためこの考案は、文字板の裏面側に
光源を設けて、文字板を透過する光によって同文字板の
照明を行う計器の照明装置であって、前記光源の光の一
部を光導板を介して指針に導き、同光源の光の他の一部
を前記文字板の裏面に直接当てるようにした計器の照明
装置において、前記光源と文字板との間に光の透過部材
を介在させると共に、この透過部材を前記光導板と同一
の材料で一体に形成してなり、前記透過部材は、光源か
ら放射してきた光を、互いに間隔を明けて広がるように
屈折させ、この屈折により拡散した光を文字板の裏面に
照射するようになっていることを特徴としている。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a light source on the back side of the dial plate and illuminates the dial plate with light transmitted through the dial plate. An illuminating device for an instrument, wherein a part of the light of the light source is guided to a pointer through a light guide plate and the other part of the light of the light source is directly applied to the back surface of the dial. In which a light transmissive member is interposed between the light source and the dial, and the transmissive member is integrally formed of the same material as the light guide plate, and the transmissive member is configured to emit light emitted from the light source. Are refracted so as to spread apart from each other and spread, and the light diffused by this refraction is applied to the back surface of the dial.
(作用) 光源からの光は透過部材を透過して文字板に至るが、透
過部材を透過した光は屈折により自然に広がる以上の広
がりをもって拡散する。そして、このように拡散した光
が文字板の裏面に届くので、文字板にはより均一な光が
当たるようになる。このため、文字板の明るさがより均
一化されるようになる。また、遮光により光の明暗を調
整するものではないから、照明効率の向上を図ることが
できる。(Function) Although the light from the light source passes through the transmissive member and reaches the dial, the light transmitted through the transmissive member is diffused with a spread larger than the natural spread by refraction. Then, since the light thus diffused reaches the back surface of the dial, more uniform light is applied to the dial. Therefore, the brightness of the dial can be made more uniform. Moreover, since the brightness of the light is not adjusted by shading, it is possible to improve the illumination efficiency.
(実施例) 以下、この考案の一実施例を図面を参照して詳細に説明
する。(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.
第1図及び第2図はこの考案の照明装置の一例を示すも
ので、第1図は正面図、第2図は減光カバー(透過部
材)の部分を詳細に示す斜視図であり、指針1、駆動部
2、光源3、文字板4、印刷部分4aについては第4図
の従来例と同様であるので、その説明は同一符号を付す
ることで省略する。1 and 2 show an example of the illuminating device of the present invention. FIG. 1 is a front view, and FIG. 2 is a perspective view showing in detail a portion of a dimming cover (transmissive member). 1, the drive unit 2, the light source 3, the dial 4, and the printed portion 4a are the same as those in the conventional example shown in FIG. 4, and the description thereof will be omitted by giving the same reference numerals.
光導板5の受光部5aには光導板5と同様に透明材料
(透明合成樹脂)からなる減光カバー(透過部材)7が
一体に形成されているが、ここで重要な点は、減光カバ
ー7が光源3に対して同心円状にならないようにして、
光源3から印刷部分4aに直進する光3aを屈折により
拡散するように形成されている点である。すなわち、半
円弧状に形成された減光カバー7が、その円弧中心(曲
率中心)が光源3及びその付近に位置しないようにし、
かつ裏面7bが光源3側に突出するようにして受光部5
aに一体に設けられている。Like the light guide plate 5, the light receiving portion 5a of the light guide plate 5 is integrally formed with a light reducing cover (transmissive member) 7 made of a transparent material (transparent synthetic resin). Make sure that the cover 7 is not concentric with the light source 3,
The point is that the light 3a traveling straight from the light source 3 to the printed portion 4a is diffused by refraction. That is, the dimming cover 7 formed in the shape of a semi-circle does not have its arc center (curvature center) located at or near the light source 3,
In addition, the back surface 7b is projected toward the light source 3 side so that the light receiving section 5
It is provided integrally with a.
従って、光源3から印刷部分4aに直進しようとする光
3aは減光カバー7を透過する際に屈折して拡散してし
まい減光カバー7を透過して印刷部分4aに直進する光
3aの割合は少なくなり、この結果、光源3の真上の印
刷部分4aが他の部分に比して極端に明るく照明される
ようなことがなくなる。すなわち、減光カバー7が一種
の凹レンズのように作用し、減光カバー7を透過した光
が互いに間隔を明けて広がるように屈折して拡散し、こ
の自然に拡散する以上に拡散した光3aが文字板4の裏
面に届く。このため、光源3の光3aが文字板4の裏面
により均一に当たるようになる。ただし、図2に示すよ
うに、光3aの一部が減光カバー7の裏面7bで反射す
ることは避けられない。Therefore, the proportion of the light 3a that is going to go straight from the light source 3 to the printed portion 4a is refracted and diffused when passing through the darkening cover 7, passes through the darkened cover 7 and goes straight to the printed portion 4a. As a result, the printed portion 4a directly above the light source 3 will not be illuminated extremely brightly as compared with other portions. That is, the light-reducing cover 7 acts like a kind of concave lens, and the light transmitted through the light-reducing cover 7 is refracted and diffused so as to spread apart from each other, and the diffused light 3a is diffused beyond the natural diffusion. Reaches the back of the dial 4. Therefore, the light 3a of the light source 3 is more uniformly applied to the back surface of the dial 4. However, as shown in FIG. 2, it is inevitable that part of the light 3a is reflected by the back surface 7b of the dimming cover 7.
なお、減光カバー7の表面7a、裏面7bには、微細な
凹凸を形成したり、半透明層を形成したりして、減光処
理を施してもよい。ただし、この減光処理は最小限のも
のですむから、減光処理によって生ずる照明効率の低下
を最小限に抑えることができる。The front surface 7a and the back surface 7b of the light attenuating cover 7 may be subjected to light attenuating treatment by forming fine unevenness or forming a semitransparent layer. However, since this dimming process is minimal, it is possible to minimize the decrease in illumination efficiency caused by the dimming process.
光源3の他の光3bは、受光部5aから光導板5に入射
し、光導板5内を全反射を繰り返しながら指針1の基部
1aに導かれ、指針1を発光させる点については従来通
りである。The other light 3b of the light source 3 enters the light guide plate 5 from the light receiving portion 5a, is guided to the base portion 1a of the pointer 1 while repeating total reflection inside the light guide plate 5, and causes the pointer 1 to emit light as in the conventional case. is there.
第3図(a)乃至(d)は上記減光カバー7の他の実施
例を示している。まず同図(a)の減光カバー7につい
て説明すると、光源3を囲むように半円弧状に形成され
ているが、その円弧中心(曲率中心)は光源3の位置及
びその付近から外れている。従って、光源3から印刷部
分4aに直進しようとする光3aは減光カバー7を透過
する際に屈折されて拡散される。すなわち、減光カバー
7が一種の凹レンズのように作用する。また、同図
(b)の減光カバー7は、同図(a)に示すものよりも
曲率が大きく形成され、かつ両側部分に円弧状の反射部
7c、7cが設けられていて、光3aを屈折により拡散
するとともに、不要な部分の光3aを反射部7c、7c
により排除するようになっている。また、同図(c)の
減光カバー7は、反射部7cが平坦に形成されている他
の同図(b)に示すものとほぼ同じである。さらに、同
図(d)の減光カバー7では、ほぼV字状に形成され
て、光3aを反射させて印刷部分4aに直進する割合を
少なくしている。FIGS. 3A to 3D show another embodiment of the dimming cover 7. First, the dimming cover 7 of FIG. 1A will be described. Although it is formed in a semi-circular shape so as to surround the light source 3, its arc center (curvature center) deviates from the position of the light source 3 and its vicinity. . Therefore, the light 3a, which is going to go straight from the light source 3 to the printed portion 4a, is refracted and diffused when passing through the dimming cover 7. That is, the light attenuating cover 7 acts like a kind of concave lens. Further, the dimming cover 7 of FIG. 3B has a larger curvature than that shown in FIG. 3A, and arc-shaped reflecting portions 7c and 7c are provided on both sides of the dimming cover 7. Light is diffused by refraction, and unnecessary portions of the light 3a are reflected by the reflecting portions 7c, 7c.
It is supposed to be eliminated by. Further, the dimming cover 7 of FIG. 7C is almost the same as the other one shown in FIG. 6B in which the reflecting portion 7c is formed flat. Further, the dimming cover 7 of FIG. 3D is formed in a substantially V shape to reduce the proportion of light 3a reflected to go straight to the printed portion 4a.
この考案では、減光カバー7が光源3に対し同心円状に
ならないようにして、光源3からの光3aを減光カバー
7で屈折させて拡散させるようにしたものである。従っ
て、減光カバー7を一種の凹レンズのように作用させた
ものであり、この減光カバー7の形状については上記実
施例のものに限定されない。In this invention, the dimming cover 7 is not concentric with the light source 3, and the light 3a from the light source 3 is refracted and diffused by the dimming cover 7. Therefore, the light-reducing cover 7 is made to act like a kind of concave lens, and the shape of the light-reducing cover 7 is not limited to that of the above-mentioned embodiment.
[考案の効果] 以上説明したようにこの考案によれば、 (イ)透過部材を光導板と一体に形成しているから、透
過部材を新たに設けても、今まで光導板を製造していた
ときのコストで製造することができ、 (ロ)透過部材によって、光源から発した光が自然に拡
散する以上に拡散して文字板の裏面に届くので、文字板
の裏面により均一な光を当てることができ、 (ハ)遮光により光の明暗を調整するものではないか
ら、照明効率の向上を図ることができ、 この結果、コストを増加させることなく、文字板の明暗
の差を減少させることができ、さらに照明効率の向上を
図ることができるという顕著な作用効果を奏する。[Advantages of the Invention] As described above, according to the present invention, (a) since the transmissive member is formed integrally with the light guide plate, the light guide plate is manufactured up to now even if a new transmissive member is provided. It can be manufactured at the same cost as the above, and (b) The transmissive member diffuses the light emitted from the light source to reach the back side of the dial more than it naturally diffuses. (C) It is possible to improve the lighting efficiency because it does not adjust the brightness of the light by blocking the light. As a result, the difference in the brightness of the dial can be reduced without increasing the cost. It is possible to achieve such a remarkable effect that the illumination efficiency can be improved.
第1図及び第2図はこの考案の照明装置の一例を示すも
ので、第1図は正面図、第2図は減光カバー(透過部
材)の部分を詳細に示す斜視図であり、また第3図
(a)乃至(d)は減光カバーの他の実施例を示す部分
側面図であり、また第4図及び第5図は従来技術を示す
もので、第4図は正面図、第5図は減光カバーの部分を
詳細に示す斜視図である。 1……指針 3……光源 4……文字板 5……光導板 7……減光カバー(透過部材)1 and 2 show an example of an illuminating device according to the present invention. FIG. 1 is a front view, FIG. 2 is a perspective view showing in detail a portion of a light attenuating cover (transmissive member), FIGS. 3 (a) to 3 (d) are partial side views showing another embodiment of the dimming cover, FIGS. 4 and 5 show a prior art, and FIG. 4 is a front view. FIG. 5 is a perspective view showing in detail the portion of the dimming cover. 1 ... pointer 3 ... light source 4 ... dial 5 ... light guide 7 ... dimming cover (transmissive member)
Claims (1)
透過する光によって同文字板の照明を行う計器の照明装
置であって、前記光源の光の一部を光導板を介して指針
に導き、同光源の光の他の一部を前記文字板の裏面に直
接当てるようにした計器の照明装置において、 前記光源と文字板との間に光の透過部材を介在させると
共に、この透過部材を前記光導板と同一の材料で一体に
形成してなり、 前記透過部材は、光源から放射してきた光を、互いに間
隔を明けて広がるように屈折させ、この屈折により拡散
した光を文字板の裏面に照射するようになっていること
を特徴とする計器の照明装置。1. An illuminating device for an instrument, wherein a light source is provided on the back side of a dial, and the dial is illuminated by light transmitted through the dial, wherein a part of the light from the light source is passed through a light guide plate. In the illumination device of the instrument, which directs the other part of the light of the same light source directly to the back surface of the dial, while interposing a light transmitting member between the light source and the dial, The transparent member is integrally formed of the same material as the light guide plate, and the transparent member refracts the light emitted from the light source so as to spread the light apart from each other, and diffuses the light diffused by the refraction. An illumination device for measuring instruments, characterized in that it illuminates the back surface of the dial.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987155733U JPH0624736Y2 (en) | 1987-10-12 | 1987-10-12 | Instrument lighting equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987155733U JPH0624736Y2 (en) | 1987-10-12 | 1987-10-12 | Instrument lighting equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0159817U JPH0159817U (en) | 1989-04-14 |
JPH0624736Y2 true JPH0624736Y2 (en) | 1994-06-29 |
Family
ID=31433619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987155733U Expired - Lifetime JPH0624736Y2 (en) | 1987-10-12 | 1987-10-12 | Instrument lighting equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0624736Y2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6056222U (en) * | 1983-09-27 | 1985-04-19 | 矢崎総業株式会社 | Instrument lighting system |
-
1987
- 1987-10-12 JP JP1987155733U patent/JPH0624736Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0159817U (en) | 1989-04-14 |
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