JPH09185336A - Display device - Google Patents

Display device

Info

Publication number
JPH09185336A
JPH09185336A JP35442895A JP35442895A JPH09185336A JP H09185336 A JPH09185336 A JP H09185336A JP 35442895 A JP35442895 A JP 35442895A JP 35442895 A JP35442895 A JP 35442895A JP H09185336 A JPH09185336 A JP H09185336A
Authority
JP
Japan
Prior art keywords
case
light
light guide
display plate
substrate
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.)
Granted
Application number
JP35442895A
Other languages
Japanese (ja)
Other versions
JP3136585B2 (en
Inventor
Satoshi Ishizuki
敏 石月
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Seiki Co Ltd
Original Assignee
Nippon Seiki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Seiki Co Ltd filed Critical Nippon Seiki Co Ltd
Priority to JP07354428A priority Critical patent/JP3136585B2/en
Publication of JPH09185336A publication Critical patent/JPH09185336A/en
Application granted granted Critical
Publication of JP3136585B2 publication Critical patent/JP3136585B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/20Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent

Abstract

PROBLEM TO BE SOLVED: To provide the display device which is good in the operability when a light guiding body is built in a case and surely holds the light guiding body in the case. SOLUTION: A light emitting diode 1 is fitted to a substrate 2, the case 3, made of synthetic resin, which surrounds all the sides of the light emitting diode 1 is arranged on the substrate 2, and a display plate 4 which has a display part is arranged at the upper end of the case 3. Further, the light guiding body 5 having a conic surface spreading from the side of the light emission diode 1 to the side of the display plate 4 so as to guide the light emitted by the light emitting diodes 1 to the display plate 4 is arranged in the case 3. This light guiding body 5 has its top surface and conic surface supported by an engagement claw 7 and a hold piece 8 formed integrally with the case 3 and is surely held in the case 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、光源から発せられ
る光を表示板に導く導光体を用いた表示装置に関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device using a light guide body that guides light emitted from a light source to a display plate.

【0002】[0002]

【従来の技術】光源から発せられる光を効率良く表示板
に導き、表示板に設けた表示部の視認性を高めるための
導光体を用いた表示装置の従来例を図5および図6に示
す。発光ダイオード1を取付けた基板2上に白色の合成
樹脂からなる円筒形のケース3を立設し、ケース3の上
端には表示部を施した表示板4が配設してある。また、
発光ダイオード1上方のケース3内には導光体5が配設
してある。この導光体5は無色透明な樹脂からなり、発
光ダイオード1からの光を表示板4に効率良く導くため
に、逆円錐形としてあり、その周面は鏡面みがきしてあ
る。そして導光体5の周囲4箇所には断面三角形のリブ
6を上下方向に設けてあり、この導光体5をケース3の
前面開口側より圧入して、前記断面三角形のリブ6をケ
ース3に食い込ませることによって固定保持させてい
る。
2. Description of the Related Art Conventional examples of a display device using a light guide for efficiently guiding light emitted from a light source to a display plate and enhancing the visibility of a display portion provided on the display plate are shown in FIGS. Show. A cylindrical case 3 made of white synthetic resin is erected on a substrate 2 on which the light emitting diode 1 is mounted, and a display plate 4 provided with a display portion is arranged at the upper end of the case 3. Also,
A light guide 5 is arranged in the case 3 above the light emitting diode 1. The light guide 5 is made of colorless and transparent resin and has an inverted conical shape in order to efficiently guide the light from the light emitting diode 1 to the display plate 4, and its peripheral surface is mirror-polished. Ribs 6 having a triangular cross section are provided in the vertical direction at four locations around the light guide 5, and the light guide 5 is press-fitted from the front opening side of the case 3 to form the rib 6 having the triangular cross section in the case 3. It is fixedly held by being cut into.

【0003】この様に構成された表示装置において、基
板2に取付けられた発光ダイオード1が点灯すると、発
光ダイオード1の真上に位置する逆円錐形の導光体5の
下面より入った光は直接、あるいは周面に反射して上方
に向い、表示板4に設けた表示部を照射するため、良好
な視認性が得られる。
In the display device having such a structure, when the light emitting diode 1 mounted on the substrate 2 is turned on, the light entering from the lower surface of the light guide body 5 of the inverted conical shape located directly above the light emitting diode 1 is emitted. Good visibility can be obtained because the display portion provided on the display plate 4 is illuminated directly or reflected upward on the peripheral surface and directed upward.

【0004】[0004]

【発明が解決しようとする課題】しかしながら前記従来
例における導光体5は、導光体5の周囲に設けた断面三
角形のリブ6をケース3に食い込ませるだけでケース3
に保持させているため、導光体5およびケース3の寸法
精度や変形等により、導光体5の圧入力が弱くて導光体
5が抜けやすかったり、逆に圧入出来ないものもあっ
た。また導光体5が傾いた状態で圧入され、発光ダイオ
ード1が点灯した時に良好な視認性が得られないという
こともあった。
However, in the light guide 5 in the above-mentioned conventional example, the case 3 is formed only by causing the rib 6 having a triangular cross section provided around the light guide 5 to bite into the case 3.
Since the light guide body 5 and the case 3 are held at the same position, due to dimensional accuracy and deformation of the light guide body 5 and the like, the pressure input of the light guide body 5 is weak and the light guide body 5 is easily pulled out, or conversely, it cannot be press-fitted. . Further, when the light guide body 5 is press-fitted in a tilted state, good visibility cannot be obtained when the light emitting diode 1 is turned on.

【0005】本発明はこの様な問題点に鑑みなされたも
ので、導光体5をケース3に組付ける際の作業性が良
く、かつ導光体5がケース3内に確実に保持される表示
装置を提供することを目的とする。
The present invention has been made in view of the above problems, and the workability in assembling the light guide 5 to the case 3 is good, and the light guide 5 is securely held in the case 3. An object is to provide a display device.

【0006】[0006]

【課題を解決するための手段】本発明は前記課題を解決
するため、基板に取付けられた光源と、この光源の四方
を囲み前記基板上に配設された合成樹脂性のケースと、
このケースの上方に配設された表示板と、前記ケース内
に保持され、前記光源側から前記表示板側に向かって拡
がる錐面を有し、光源から発せられる光を表示板に導く
導光体と、前記ケースと一体に形成され、前記導光体の
上面を抜け止め支持する係止爪、および前記錐面を支持
する保持片とからなる。また、前記保持片を導光体の錐
面を包むような形で形成する。
In order to solve the above problems, the present invention provides a light source mounted on a substrate, a synthetic resin case which surrounds four sides of the light source and is disposed on the substrate.
A display plate disposed above the case, and a light guide that is held in the case and has a conical surface that spreads from the light source side toward the display plate side, and guides light emitted from the light source to the display plate. It comprises a body, a locking claw that is integrally formed with the case and that holds and supports the upper surface of the light guide, and a holding piece that supports the conical surface. Further, the holding piece is formed so as to enclose the conical surface of the light guide.

【0007】[0007]

【発明の実施の形態】基板に光源を取付け、この光源の
四方を囲む合成樹脂性のケースを基板上に配設し、ケー
スの上端に表示部を施した表示板を配設する。またケー
ス内には光源から発せられる光を表示板に導くために光
源側から表示板側に向かって拡がる錐面を有する導光体
を配設する。この導光体はケースと一体に形成された係
止爪によって上面が抜け止め支持され、導光体の下方は
同様にケースと一体に形成された保持片によって錐面が
支持されている。この様に導光体は係止爪と保持片とに
よってケース内に確実に保持される。
BEST MODE FOR CARRYING OUT THE INVENTION A light source is attached to a substrate, a synthetic resin case surrounding the four sides of the light source is arranged on the substrate, and a display plate having a display portion is arranged at the upper end of the case. In addition, a light guide body having a conical surface that spreads from the light source side toward the display plate side is arranged in the case in order to guide the light emitted from the light source to the display plate. The upper surface of the light guide body is retained and supported by locking pawls formed integrally with the case, and the conical surface is supported below the light guide body by a holding piece also formed integrally with the case. In this way, the light guide body is securely held in the case by the locking claw and the holding piece.

【0008】[0008]

【実施例】本発明を図1から図4に示す実施例に基づい
て説明するが、従来例と同一もしくは相当箇所には同一
符号を付す。基板2に発光ダイオード1を取付け、この
発光ダイオード1の四方を囲む白色の合成樹脂からなる
ケース3を基板2上に配設し、ケース3の上端には表示
部を施した表示板4を配設する。また発光ダイオード1
上方のケース3内には発光ダイオード1から発せられた
光を表示板4に導くための導光体5が配設してある。こ
の導光体5は無色透明な樹脂からなり、発光ダイオード
1からの光を表示板4に効率良く導くために、逆円錐形
としてあり、その周面は鏡面みがきしてある。導光体5
はケース3と一体に形成された2個の係止爪7と2個の
保持片8とによってケース3内に保持されているが、こ
の係止爪7はケース3の上端中ほどに設けられており、
保持片8は導光体5の円錐面を包むようにして、かつ合
成樹脂自体の弾力性を利用して上方からの応力によって
撓みが生じるように、ケース3の内壁面より斜め下方に
向かって形成されている。また保持片8と導光体5の円
錐面とが対向する保持片8箇所には導光体5の位置を出
しやすくするために突部9が1個の保持片8につき2箇
所設けられて、この突部9で導光体5の円錐面を受けて
いる。なお、この突部9は設けなくともよい。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the embodiments shown in FIGS. 1 to 4. The same or corresponding parts as those of the conventional example are designated by the same reference numerals. The light emitting diode 1 is attached to the substrate 2, a case 3 made of white synthetic resin that surrounds the light emitting diode 1 on all sides is arranged on the substrate 2, and a display plate 4 provided with a display portion is arranged at the upper end of the case 3. Set up. Also light emitting diode 1
Inside the upper case 3, a light guide 5 for guiding the light emitted from the light emitting diode 1 to the display plate 4 is arranged. The light guide 5 is made of colorless and transparent resin and has an inverted conical shape in order to efficiently guide the light from the light emitting diode 1 to the display plate 4, and its peripheral surface is mirror-polished. Light guide 5
Is held in the case 3 by two locking claws 7 and two holding pieces 8 formed integrally with the case 3. The locking claws 7 are provided near the upper end of the case 3. And
The holding piece 8 is formed so as to wrap around the conical surface of the light guide body 5 and obliquely downward from the inner wall surface of the case 3 so that the elastic force of the synthetic resin itself causes bending due to stress from above. ing. In addition, in order to make it easy to position the light guide 5, protrusions 9 are provided at two positions for each holding piece 8 so that the holding piece 8 and the conical surface of the light guide 5 face each other. The projection 9 receives the conical surface of the light guide 5. The protrusion 9 may not be provided.

【0009】この様に構成された表示装置における導光
体5はケース3の前面開口側より挿入するが、挿入の
際、係止爪7を設けたケース3が外側に撓んだ状態で挿
入されて、挿入後はケース3がもとに戻り係止爪7によ
って導光体5の上方への抜けが阻止される。また導光体
5の下方は導光体5をケース3内に挿入した際、導光体
5の円錐面が保持片8に設けた突部9に当接して保持片
8が下方に撓むようになるが、反撥力によって導光体5
は上方へ付勢されており、この様に導光体5は係止爪7
と保持片8とによってケース3内にガタついたりするこ
となく確実に保持される。そして発光ダイオード1が点
灯すると発光ダイオード1から発せられた光は導光体5
内に入り直接、あるいは周面に反射して上面に向い、こ
れによって表示板4に施された表示部を視認可能とする
ものである。また、白色のケース3と一体に形成された
前記保持片8が導光体5の円錐面を包むような形で形成
されているため、保持片8が反射壁としての機能も有
し、導光体5内から抜け出た光が保持片8に反射して、
再び導光体5内に入って上方に導かれて表示部の輝度が
高められ、より良好な視認性が得られる。
The light guide 5 in the display device having such a structure is inserted from the front opening side of the case 3, but at the time of insertion, the case 3 provided with the locking claws 7 is bent outward. After the insertion, the case 3 returns to its original position and the locking claws 7 prevent the light guide 5 from coming off upward. Also, below the light guide 5, when the light guide 5 is inserted into the case 3, the conical surface of the light guide 5 contacts the protrusion 9 provided on the holding piece 8 so that the holding piece 8 bends downward. However, due to the repulsive force, the light guide 5
Is urged upward, and thus the light guide body 5 is locked by the locking claws 7 in this manner.
With the holding piece 8, the case 3 is securely held without rattling. When the light emitting diode 1 is turned on, the light emitted from the light emitting diode 1 is guided by the light guide body 5.
It goes into the inside, or is reflected by the peripheral surface and faces the upper surface, so that the display portion provided on the display plate 4 can be visually recognized. Further, since the holding piece 8 integrally formed with the white case 3 is formed so as to wrap the conical surface of the light guide body 5, the holding piece 8 also has a function as a reflection wall, and the guiding piece 8 is provided. The light emitted from the inside of the light body 5 is reflected on the holding piece 8,
The light enters the light guide member 5 again and is guided upward, so that the brightness of the display portion is increased and better visibility is obtained.

【0010】なお、本実施例において光源を発光ダイオ
ード1としたが、発光ダイオード1に限定するものでは
ない。また、導光体5を逆円錐形としたが、逆角錐形と
してもよい。また、表示装置は本実施例の如くそれ自体
が単独でもよく、あるいは他の表示装置などに付随的に
設けられていてもよい。
Although the light source is the light emitting diode 1 in this embodiment, the light source is not limited to the light emitting diode 1. Further, although the light guide body 5 has an inverted conical shape, it may have an inverted pyramid shape. Further, the display device may be a single device as in the present embodiment, or may be provided as an adjunct to another display device or the like.

【0011】[0011]

【発明の効果】本発明はこの様に、基板に取付けられた
光源と、この光源の四方を囲み前記基板上に配設された
合成樹脂性のケースと、このケースの上方に配設された
表示板と、前記ケース内に保持され、前記光源側から前
記表示板側に向かって拡がる錐面を有し、光源から発せ
られる光を表示板に導く導光体と、前記ケースと一体に
形成され、前記導光体の上面を抜け止め支持する係止
爪、および前記錐面を支持する保持片とからなるため、
導光体はケースの前面開口側より挿入するだけで組付け
の作業性も良く、挿入後は係止爪によって導光体の上方
への抜けが阻止され、また、保持片の反撥力によって導
光体の錐面が上方へ付勢されているため、ケース内で導
光体がガタついたりすることなく確実に保持される。ま
た、前記保持片を導光体の錐面を包むような形で形成し
たため、保持片が反射壁としての機能も有し、導光体内
から抜け出た光が保持片8に反射して、再び導光体内に
入って上方に導かれて表示部の輝度が高められ、より良
好な視認性が得られる。
As described above, according to the present invention, the light source mounted on the substrate, the synthetic resin case surrounding the four sides of the light source and disposed on the substrate, and the case disposed above the case. A display plate, a light guide body held in the case, having a conical surface extending from the light source side to the display plate side, and guiding light emitted from the light source to the display plate, and integrally formed with the case. Since it is composed of a locking claw that holds and supports the upper surface of the light guide, and a holding piece that supports the conical surface,
The light guide is inserted from the front opening side of the case, and the workability of assembly is good.After the insertion, the locking claws prevent the light guide from coming out upward, and the holding piece repels the guide. Since the conical surface of the light body is biased upward, the light guide body is securely held in the case without rattling. In addition, since the holding piece is formed so as to wrap around the conical surface of the light guide, the holding piece also has a function as a reflection wall, and the light that has escaped from the light guide body is reflected by the holding piece 8 and again. The light enters the light guide body and is guided upward so that the brightness of the display portion is increased, and a better visibility is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例のケースと導光体の組付け状態
を示す正面図。
FIG. 1 is a front view showing an assembled state of a case and a light guide according to an embodiment of the present invention.

【図2】同実施例を示す表示装置の断面図。FIG. 2 is a cross-sectional view of a display device showing the same embodiment.

【図3】同実施例を示す表示装置の断面図。FIG. 3 is a cross-sectional view of a display device showing the same embodiment.

【図4】同実施例のケースと導光体の組付け状態を示す
裏面図。
FIG. 4 is a rear view showing an assembled state of the case and the light guide body of the embodiment.

【図5】従来例のケースと導光体の組付け状態を示す正
面図。
FIG. 5 is a front view showing an assembled state of a case and a light guide of a conventional example.

【図6】従来例を示す表示装置の断面図。FIG. 6 is a cross-sectional view of a display device showing a conventional example.

【符号の説明】[Explanation of symbols]

1 発光ダイオード(光源) 2 基板 3 ケース 4 表示板 5 導光体 7 係止爪 8 保持片 1 Light emitting diode (light source) 2 Substrate 3 Case 4 Display plate 5 Light guide 7 Locking claw 8 Holding piece

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 基板に取付けられた光源と、この光源の
四方を囲み前記基板上に配設された合成樹脂性のケース
と、このケースの上方に配設された表示板と、前記ケー
ス内に保持され、前記光源側から前記表示板側に向かっ
て拡がる錐面を有し、光源から発せられる光を表示板に
導く導光体と、前記ケースと一体に形成され、前記導光
体の上面を抜け止め支持する係止爪、および前記錐面を
支持する保持片とからなることを特徴とする表示装置。
1. A light source mounted on a substrate, a synthetic resin case which surrounds four sides of the light source and is disposed on the substrate, a display plate disposed above the case, and the inside of the case. And a light guide body that has a conical surface that extends from the light source side toward the display plate side and guides light emitted from the light source to the display plate, and is integrally formed with the case. A display device comprising: a locking claw that holds and supports the upper surface, and a holding piece that supports the conical surface.
【請求項2】 前記保持片が導光体の錐面を包むような
形で形成されていることを特徴とする請求項1記載の表
示装置。
2. The display device according to claim 1, wherein the holding piece is formed so as to surround the conical surface of the light guide.
JP07354428A 1995-12-29 1995-12-29 Display device Expired - Fee Related JP3136585B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07354428A JP3136585B2 (en) 1995-12-29 1995-12-29 Display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07354428A JP3136585B2 (en) 1995-12-29 1995-12-29 Display device

Publications (2)

Publication Number Publication Date
JPH09185336A true JPH09185336A (en) 1997-07-15
JP3136585B2 JP3136585B2 (en) 2001-02-19

Family

ID=18437499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP07354428A Expired - Fee Related JP3136585B2 (en) 1995-12-29 1995-12-29 Display device

Country Status (1)

Country Link
JP (1) JP3136585B2 (en)

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