JP2003194593A - Pointer illuminator - Google Patents
Pointer illuminatorInfo
- Publication number
- JP2003194593A JP2003194593A JP2001399573A JP2001399573A JP2003194593A JP 2003194593 A JP2003194593 A JP 2003194593A JP 2001399573 A JP2001399573 A JP 2001399573A JP 2001399573 A JP2001399573 A JP 2001399573A JP 2003194593 A JP2003194593 A JP 2003194593A
- Authority
- JP
- Japan
- Prior art keywords
- light
- pointer
- light guide
- emitting diode
- light emitting
- 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
Links
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- B60K2360/6992—
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、導光体を用いて光
源の光を指針側に導き、指針を照明する指針照明装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer illuminating device that guides light from a light source to a pointer side by using a light guide to illuminate the pointer.
【０００２】[0002]
【従来の技術】従来の指針照明装置を図４に示す。回路
基板１の裏面側に回路基板１と導通状態で装着され、回
路基板１を貫通して前方に延びる回動軸２を有する計器
本体３と、回動軸２の先端側に固着される指針軸４を有
する指針５と、回路基板１上に実装され指針５の指示部
６を照明する光源としての発光ダイオード７と、発光ダ
イオード７の光を指針５側に導く導光体８を備えてい
る。この導光体８は凸状の受光部９を有する略角柱状ま
たは略円柱状である。そして、受光部９から導光体８内
に入った発光ダイオード７の光は直進あるいは反射を繰
り返しながら進み、導光体８の出射面１０より出射され
て指針５の内部に入り、指針反射面１１で反射して指示
部６を照明（発光）するようにしてある。2. Description of the Related Art A conventional pointer illumination device is shown in FIG. An instrument main body 3 having a rotary shaft 2 that is mounted on the back surface of the circuit board 1 in a conductive state with the circuit board 1 and extends forward through the circuit board 1, and a pointer fixed to the tip end side of the rotary shaft 2. A pointer 5 having an axis 4, a light emitting diode 7 as a light source mounted on the circuit board 1 for illuminating an indicator 6 of the pointer 5, and a light guide 8 for guiding the light of the light emitting diode 7 to the pointer 5 side are provided. There is. The light guide 8 has a substantially prismatic shape or a substantially cylindrical shape having a light receiving portion 9 having a convex shape. Then, the light of the light emitting diode 7 which has entered the light guide 8 from the light receiving portion 9 advances straightly or while repeating the reflection, is emitted from the emitting surface 10 of the light guide 8 and enters the inside of the pointer 5, and the pointer reflecting surface. The indicator 6 is illuminated (emits) by being reflected by 11.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記従
来例においては、図４に矢印Ｚで示したように、発光ダ
イオード７の光が導光体８内に入らない場合や、導光体
８内に入った光が反射を繰り返すことにより減衰してし
まうということがあって、満足する指針５（指示部６）
の明るさが得られない場合がある。However, in the above-mentioned conventional example, as shown by the arrow Z in FIG. 4, the light of the light emitting diode 7 does not enter the light guide body 8 or the inside of the light guide body 8. The incident light may be attenuated due to repeated reflection, so that the pointer 5 (instruction unit 6) is satisfied.
The brightness of may not be obtained.
【０００４】本発明はこの様な点に鑑みなされたもの
で、光源から発せられた光を出来るだけ多く導光体内に
取り込み、かつ指針側に効率よく導いて指針をより明る
く照明するようにした指針照明装置を提供することを目
的とする。The present invention has been made in view of such a point, and takes in as much light emitted from the light source as possible into the light guide body and efficiently guides it to the pointer side to illuminate the pointer brighter. An object is to provide a pointer lighting device.
【０００５】[0005]
【課題を解決するための手段】本発明は前記目的を達成
するため、指針と、この指針を照明する光源と、この光
源と前記指針との間の前記光源側に配置され、光源側が
凹状の受光部を有する第１導光部で前記指針側が略錐状
の第２導光部とからなる第１の導光体と、前記指針側に
配置された略柱状の第２の導光体とを備えたものであ
る。In order to achieve the above object, the present invention is provided with a pointer, a light source for illuminating the pointer, and the light source side between the light source and the pointer, the light source side having a concave shape. A first light guide having a light receiving portion and a second light guide having a substantially pyramidal side on the pointer side; and a substantially columnar second light guide arranged on the pointer side. It is equipped with.
【０００６】また、前記第１導光部が略円柱状で、前記
第２導光部が略円錐状で、前記第２の導光体が略円柱状
である。Further, the first light guide portion has a substantially cylindrical shape, the second light guide portion has a substantially conical shape, and the second light guide body has a substantially cylindrical shape.
【０００７】また、前記第２導光部と前記第２の導光体
との径が一致しているものである。The diameters of the second light guide portion and the second light guide body are the same.
【０００８】[0008]
【発明の実施の形態】本発明の指針照明装置を車両用の
計器に適用した実施形態として説明する。図１は車両用
の計器の部分断面を示し、硬質な回路基板１と、この回
路基板１の裏面側に回路基板１と導通状態で装着され、
回路基板１を貫通して前方に延びる回動軸２を有する例
えば速度計用の計器本体３と、回動軸２の先端側に固着
される指針軸４を有する指針５と、この指針５の後方に
配置され指針５の動作に対応する表示部（図示せず）を
設けた表示板１２と、回路基板１上に実装され指針５を
照明する例えば白色で発光する発光ダイオード７および
表示板１２の表示部を照明する例えば赤色で発光する発
光ダイオード７Ａと、発光ダイオード７の光を指針５側
に導く第１の導光体１３および第２の導光体１４と、発
光ダイオード７Ａの光を表示板１２側に導く表示板用導
光体１５と、表示板１２と回路基板１との間に配置され
表示板１２および表示板用導光体１５を保持する保持部
材１６を備えている。１７は指針５や表示板１２の前方
側を覆う無色透明な透視板であり、１８は回路基板１の
裏面側を覆うカバーである。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the pointer lighting device of the present invention is applied to a vehicle instrument will be described. FIG. 1 shows a partial cross section of an instrument for a vehicle, which includes a hard circuit board 1 and a circuit board 1 mounted on the back side of the circuit board 1 in a conductive state.
For example, an instrument body 3 for a speedometer having a rotating shaft 2 penetrating the circuit board 1 and extending forward, a pointer 5 having a pointer shaft 4 fixed to the tip end side of the rotating shaft 2, and a pointer 5 of the pointer 5. A display plate 12 arranged on the rear side and provided with a display portion (not shown) corresponding to the operation of the pointer 5, and a light emitting diode 7 and a display plate 12 mounted on the circuit board 1 for illuminating the pointer 5 and emitting white light, for example. The light emitting diode 7A that illuminates the display section of, for example, red light, the first light guide 13 and the second light guide 14 that guide the light of the light emitting diode 7 toward the pointer 5, and the light of the light emitting diode 7A. A display plate light guide 15 that leads to the display plate 12 side and a holding member 16 that is disposed between the display plate 12 and the circuit board 1 and holds the display plate 12 and the display plate light guide 15 are provided. Reference numeral 17 is a colorless and transparent see-through plate that covers the front side of the pointer 5 and the display plate 12, and 18 is a cover that covers the back side of the circuit board 1.
【０００９】指針５は無色透明な合成樹脂からなる指示
部６と、この指示部６と一体形成された指針軸４と、指
示部６の基部１９周囲（指針軸４の上方）を覆う遮光部
材としての黒色の指針キャップ２０と、バランサー２１
からなる。指示部６の裏面には例えば白色の箔２２がホ
ットスタンプされている。また、指示部６の基部１９側
には指針受光部２３および指針反射面１１が形成してあ
る。なお、指示部６と指針軸４は別体でも良い。この指
針５は、指針軸４を計器本体３の回動軸２に圧入するこ
とによって計器本体３に固着されている。The pointer 5 is a light-shielding member that covers a pointer 6 made of colorless and transparent synthetic resin, a pointer shaft 4 integrally formed with the pointer 6, and a base 19 of the pointer 6 (above the pointer shaft 4). Black pointer cap 20 and balancer 21
Consists of. For example, a white foil 22 is hot-stamped on the back surface of the indicator 6. Further, a pointer light receiving portion 23 and a pointer reflecting surface 11 are formed on the base portion 19 side of the pointing portion 6. The indicator 6 and the pointer shaft 4 may be separate bodies. The pointer 5 is fixed to the instrument main body 3 by press-fitting the pointer shaft 4 into the rotary shaft 2 of the instrument main body 3.
【００１０】表示板１２は、詳細は図示しないが、無色
透明な基板の表面側に車両の速度を現す目盛，数字など
の表示部となる例えば白色の透過性表示層を形成し、表
示部を除いて例えば黒色の地色層を形成してある。この
表示部は発光ダイオード７Ａが点灯しないときは白色で
視認されるが、発光ダイオード７Ａが点灯したときは赤
色で透過表示する様になっている。Although not shown in detail, the display plate 12 is provided with a transparent display layer of, for example, white, which serves as a display portion of scales and numbers showing the speed of the vehicle on the surface side of a colorless and transparent substrate. Except for this, for example, a black ground color layer is formed. This display portion is visually recognized in white when the light emitting diode 7A is not turned on, but is transparently displayed in red when the light emitting diode 7A is turned on.
【００１１】第１の導光体１３は無色透明な合成樹脂か
らなり、指針５照明用の発光ダイオード７に対向して配
置されており、発光ダイオード７からの光を取り込む凹
状の受光部９Ａを有する末広がり（発光ダイオード７側
の径が僅かに大きい）の円柱状の第１導光部２４と、指
針５の指針受光部２３側が円錐状の第２導光部２５とか
らなり、第１導光部２４と第２導光部２５とは一体とな
っている。詳細は後述するが、この第２導光部２５の周
囲は、第１の導光体１３内に入った光が出射する出射面
１０Ａでもあり、その断面は直線に近い曲線となってい
る。また、本実施形態の場合、指針５照明用の発光ダイ
オード７は回動軸２の周囲に３個配置してあり、この発
光ダイオード７に対応して第１の導光体１３も３個配置
されているが、図２に示す様にそれぞれは連結部２６に
よって接続されて一体に形成されている。The first light guide 13 is made of colorless and transparent synthetic resin and is arranged so as to face the light emitting diode 7 for illuminating the pointer 5, and has a concave light receiving portion 9A for taking in light from the light emitting diode 7. The first light guide portion 24 has a columnar shape having a divergent end (the diameter on the light emitting diode 7 side is slightly larger) and the second light guide portion 25 on the pointer light receiving portion 23 side of the pointer 5. The light section 24 and the second light guide section 25 are integrated. Although the details will be described later, the periphery of the second light guide portion 25 is also an emission surface 10A from which the light entering the first light guide body 13 is emitted, and the cross section thereof is a curve close to a straight line. Further, in the case of the present embodiment, three light emitting diodes 7 for illuminating the pointer 5 are arranged around the rotary shaft 2, and three first light guides 13 are also arranged corresponding to the light emitting diodes 7. However, as shown in FIG. 2, they are connected by a connecting portion 26 and are integrally formed.
【００１２】第１の導光体１３と指針５の指針受光部２
３との間に配置される第２の導光体１４は第１の導光体
１３に対向している。この第２の導光体１４は無色透明
な合成樹脂からなり、円柱状を成している。また、第２
の導光体１４は第１の導光体１３から出射された光を受
光する平坦な受光部９Ｂと、平面に近い凸状の出射面１
０Ｂを有している。この第２の導光体１４の径は、前述
した第１の導光体１３の第２導光部２５の径とほぼ一致
させてある。Pointer light receiving portion 2 of the first light guide 13 and the pointer 5.
The second light guide body 14 arranged between the first light guide body 13 and the second light guide body 13 faces the first light guide body 13. The second light guide 14 is made of a colorless and transparent synthetic resin and has a columnar shape. Also, the second
The light guide 14 has a flat light receiving portion 9B for receiving the light emitted from the first light guide 13, and a convex emission surface 1 close to a plane.
It has 0B. The diameter of the second light guide body 14 is made substantially equal to the diameter of the second light guide portion 25 of the first light guide body 13 described above.
【００１３】表示板用導光体１５は中央部に丸穴を有す
る略ドーナツ状の無色透明な合成樹脂からなる。発光ダ
イオード７Ａの光を受光する受光部９Ｃと、この受光部
９Ｃから入射した光を周囲方向に反射させる反射面２７
を有している。また、この反射面２７で反射して周囲方
向に導かれた光は、出射面１０Ｃから出射される。ま
た、本実施形態における表示板用導光体１５の裏面には
係止爪２８を有する弾性片２９が設けてある。なお、表
示板用導光体１５と第２の導光体１４とは連結部２６Ａ
によって接続されている。また、図示しないが第２の導
光体１４同士も接続されて一体に形成されている。The light guide 15 for the display plate is made of a substantially donut-shaped colorless and transparent synthetic resin having a round hole in the center thereof. A light receiving portion 9C that receives the light of the light emitting diode 7A, and a reflecting surface 27 that reflects the light incident from the light receiving portion 9C in the circumferential direction.
have. Further, the light reflected by the reflecting surface 27 and guided in the peripheral direction is emitted from the emitting surface 10C. Further, an elastic piece 29 having a locking claw 28 is provided on the back surface of the light guide body 15 for a display plate in the present embodiment. The display plate light guide 15 and the second light guide 14 are connected to each other by a connecting portion 26A.
Connected by. Although not shown, the second light guides 14 are also connected and integrally formed.
【００１４】保持部材１６は遮光性のある白色の合成樹
脂からなり、回路基板１とほぼ平行な底部３０と、回動
軸２周囲の指針５照明用の発光ダイオード７と表示板１
２の表示部を照明する発光ダイオード７Ａとの間に立設
した筒状部３１と、底部３０から表示板１２の周囲側に
向かって傾斜して形成された反射部３２とを備えてい
る。また、表示板用導光体１５の裏面に設けた弾性片２
９に対応する底部３０には孔３３が設けてあり、この孔
３３に弾性片２９を挿入して係止爪２８を底部３０の裏
面に係止することにより、表示板用導光体１５が保持部
材１６に固定される。また、表示板１２は筒状部３１先
端の段部と保持部材１６の平坦部３４とに載置された状
態で保持部材１６に保持される。筒状部３１は表示板１
２を保持するとともに、発光ダイオード７，７Ａのそれ
ぞれの光が混じり合わないように区画するものでもあ
る。The holding member 16 is made of white synthetic resin having a light-shielding property, and has a bottom portion 30 substantially parallel to the circuit board 1, a light emitting diode 7 for illuminating the pointer 5 around the rotating shaft 2 and the display board 1.
The cylindrical portion 31 is provided upright between the second display portion and the light emitting diode 7A that illuminates the display portion, and the reflecting portion 32 is formed so as to be inclined from the bottom portion 30 toward the peripheral side of the display plate 12. In addition, the elastic piece 2 provided on the back surface of the light guide body 15 for the display plate
A hole 33 is provided in the bottom portion 30 corresponding to 9, and the elastic piece 29 is inserted into the hole 33 to lock the locking claw 28 on the back surface of the bottom portion 30. It is fixed to the holding member 16. Further, the display plate 12 is held by the holding member 16 while being placed on the stepped portion at the tip of the tubular portion 31 and the flat portion 34 of the holding member 16. The tubular portion 31 is the display plate 1
It also holds 2 and partitions the light of the light emitting diodes 7 and 7A so as not to mix with each other.
【００１５】発光ダイオード７Ａが点灯すると、前述し
た如く、点灯光は表示板用導光体１５の受光部９Ｃから
入射し、反射面２７で反射して出射面１０Ｃから出射さ
れる。そして、保持部材１６の反射部３２に到達して、
この反射部３２に反射して表示板１２の裏面側に向か
い、表示部が透過照明される。この際、出射面１０Ｃか
ら出射された光は全て保持部材１６の反射部３２に到達
するものではなく、底部３０の内側に反射して表示板１
２の裏面側に向かう光や表示板１２の裏面を直射する光
もある。この様に、保持部材１６は表示板１２と表示板
用導光体１５を保持するとともに、反射部材としての役
目も果たす。When the light emitting diode 7A is lit, as described above, the lit light enters from the light receiving portion 9C of the light guide member 15 for the display plate, is reflected by the reflecting surface 27 and is emitted from the emitting surface 10C. Then, when reaching the reflecting portion 32 of the holding member 16,
The display portion is reflected by the reflecting portion 32 toward the back surface side of the display plate 12, and the display portion is illuminated by transmission. At this time, all the light emitted from the emission surface 10C does not reach the reflecting portion 32 of the holding member 16, but is reflected inside the bottom portion 30 to be reflected on the display panel 1.
There is also light that goes to the back surface side of 2 and light that directly hits the back surface of the display plate 12. Thus, the holding member 16 holds the display plate 12 and the light guide 15 for the display plate, and also serves as a reflecting member.
【００１６】次に、指針の照明を図３に基づいて説明す
る。第１の導光体１３を構成する第１導光部２４に形成
された凹状の受光部９Ａから第１の導光体１３内に入
り、第２導光部２５の出射面１０Ａ方向に進んだ発光ダ
イオード７の光は、出射面１０Ａで屈折してほぼ真上方
向（第２の導光体１４方向）に出射される。そして、第
２の導光体１４の受光部９Ｂから第２の導光体１４内に
入った光は直進して出射面１０Ｂから出射される（図３
中、矢印Ｘ参照）。そして、図１に示す指針受光部２３
から基部１９内に入り、指針反射面１１で指示部６側に
反射して、指針５の指示部６を白色で照明する。Next, the illumination of the pointer will be described with reference to FIG. From the concave light receiving portion 9A formed in the first light guide portion 24 forming the first light guide body 13, the light enters into the first light guide body 13 and advances toward the emission surface 10A of the second light guide portion 25. The light of the light emitting diode 7 is refracted at the emission surface 10A and is emitted substantially upward (to the direction of the second light guide 14). Then, the light that has entered the second light guide 14 from the light receiving portion 9B of the second light guide 14 travels straight and is emitted from the emission surface 10B (FIG. 3).
(See arrow X in the middle). Then, the pointer light receiving portion 23 shown in FIG.
From the inside to the inside of the base portion 19 and is reflected by the pointer reflecting surface 11 toward the pointing portion 6 side to illuminate the pointing portion 6 of the pointer 5 with white.
【００１７】また、斜め前方方向に進んだ発光ダイオー
ド７の光は、受光部９Ａから第１の導光体１３を構成す
る第１導光部２４内に入り、周面（反射面２７Ａ）で反
射して第１導光部２４から第１の導光体１３を構成する
第２導光部２５内に入って、第２導光部２５の出射面１
０Ａから第２の導光体１４側に出射される。そして、第
２の導光体１４の受光部９Ｂから第２の導光体１４内に
入った光は周面（反射面２７Ｂ）に反射して進み、出射
面１０Ｂから出射される（図３中、矢印Ｙ参照）。そし
て、指針受光部２３から基部１９内に入り、指針反射面
１１で指示部６側に反射して、指針５の指示部６を白色
で照明する。Further, the light of the light emitting diode 7 which has proceeded in the diagonally forward direction enters the first light guide section 24 constituting the first light guide body 13 from the light receiving section 9A and is reflected by the peripheral surface (reflection surface 27A). The light exiting surface 1 of the second light guide portion 25 is reflected and enters the second light guide portion 25 that constitutes the first light guide body 13 from the first light guide portion 24.
The light is emitted from 0A to the second light guide 14 side. Then, the light that has entered the second light guide 14 from the light receiving portion 9B of the second light guide 14 is reflected by the peripheral surface (reflection surface 27B) and travels, and is emitted from the emission surface 10B (FIG. 3). (See arrow Y in the middle). Then, the light enters from the pointer light receiving portion 23 into the base portion 19, is reflected by the pointer reflecting surface 11 toward the pointing portion 6 side, and illuminates the pointing portion 6 of the pointer 5 with white.
【００１８】この様に、発光ダイオード７の光を指針５
側に導くために、第１の導光体１３の受光部９Ａを凹状
とすることによって、発光ダイオード７から放射状に出
射する多くの光を第１の導光体１３内に取り込むことが
できる。例えば、凹状受光部９Ａの頂点と発光ダイオー
ド７との距離を、従来の凸状受光部９の頂点と発光ダイ
オード７との距離とほぼ等しくし、受光部９Ａが発光ダ
イオード７を取り巻くような凹状とすることによって、
殆どの光を第１の導光体１３内に取り込むことができ
る。また、発光ダイオード７と指針５との間に第１の導
光体１３と第２の導光体１４を配置したことによって、
第１導光部２４から取り込んだ光を第２の導光体１４に
集光させて入射させることができる。In this way, the light from the light emitting diode 7 is guided by the pointer 5
By making the light receiving portion 9A of the first light guide 13 concave so as to be guided to the side, a large amount of light radially emitted from the light emitting diode 7 can be taken into the first light guide 13. For example, the distance between the apex of the concave light receiving portion 9A and the light emitting diode 7 is made substantially equal to the distance between the apex of the conventional convex light receiving portion 9 and the light emitting diode 7, and the light receiving portion 9A has a concave shape surrounding the light emitting diode 7. By
Most of the light can be taken into the first light guide 13. Further, by disposing the first light guide 13 and the second light guide 14 between the light emitting diode 7 and the pointer 5,
The light taken in from the first light guide portion 24 can be condensed and incident on the second light guide body 14.
【００１９】よって、多くの光を指針５側に導くことが
可能となって、指針５の指示部６を明るく照明（発光）
させることができる（従来に比べて、指示部６の輝度を
アップさせることができる）。この際、第２導光部２５
の出射面１０Ａに到達した光は、この出射面１０Ａで屈
折して第２の導光体１４を透過して指針受光部２３へと
直進するため、反射によるロスをより少なくして指針５
をより明るく照明できる。真上方向から多少ずれた光で
あっても、出射面１０Ａに直進した光であれば、指針受
光部２３へとほぼ真っ直ぐ導くことが可能である。Therefore, it becomes possible to guide a large amount of light to the pointer 5 side, and the indicator portion 6 of the pointer 5 is illuminated brightly (emits).
(It is possible to increase the brightness of the indicator 6 as compared with the conventional case). At this time, the second light guide 25
The light that has reached the exit surface 10A is refracted at the exit surface 10A, passes through the second light guide 14 and goes straight to the pointer light receiving portion 23, so that the loss due to the reflection is further reduced.
Can be illuminated brighter. Even if the light is slightly deviated from the direction directly above, if the light goes straight to the emission surface 10A, it can be guided almost straight to the pointer light receiving unit 23.
【００２０】なお、第１導光部２４および第２の導光体
１４を円柱状とし、第２導光部２５を円錐状としたが、
その形状は底面が真円である必要はなく、例えば円に近
い多角形あるいは楕円形であったり、反射面が多少傾斜
していたり曲線であっても良い。すなわち、略柱状（略
円柱状），略錐状（略円錐状）でよい。但し、円に近い
程発光ダイオード７の光を効率良く指針５側に導くこと
ができ、指示部６をより明るく照明することができる。Although the first light guide portion 24 and the second light guide body 14 have a cylindrical shape and the second light guide portion 25 has a conical shape,
The shape does not need to be a perfect circle at the bottom surface, and may be, for example, a polygon or an ellipse close to a circle, or the reflecting surface may be slightly inclined or curved. That is, it may have a substantially columnar shape (a substantially cylindrical shape) or a substantially conical shape (a substantially conical shape). However, the closer to the circle, the more efficiently the light of the light emitting diode 7 can be guided to the side of the pointer 5, and the brighter the indicator 6 can be illuminated.
【００２１】また、本実施形態では第２導光部２５（出
射面１０Ａ）の径（図３中、ａ）と、第２の導光体１４
の径（図３中、ｂ）をほぼ一致させている。これは前述
したように、第２導光部２５の出射面１０Ａに到達した
光は指針受光部２３へとほぼ真っ直ぐ導くことが可能で
あるが、第２導光部２５の径が第２の導光体１４の径よ
り大きいと、反射面２７Ａ寄りの出射面１０Ａに到達し
た光は、そこで屈折したとしても第２導光部２５内に入
らない。逆に、第２導光部２５の径が第２の導光体１４
の径より小さいと、出射面１０Ａ寄りの反射面２７Ａに
到達した光は反射を繰り返して指針受光部２３へと進
み、直進光が少なくなってしまう。よって、指針５の明
るさが多少低下するため、第２導光部２５と第２の導光
体１４との径はほぼ一致していることが望ましい。Further, in this embodiment, the diameter of the second light guide portion 25 (emission surface 10A) (a in FIG. 3) and the second light guide body 14 are set.
The diameters (in FIG. 3, b) are substantially the same. As described above, the light reaching the emitting surface 10A of the second light guide portion 25 can be guided almost straight to the pointer light receiving portion 23, but the diameter of the second light guide portion 25 is the second. If the diameter of the light guide body 14 is larger than the diameter of the light guide body 14, the light reaching the emission surface 10A near the reflection surface 27A does not enter the second light guide portion 25 even if refracted there. On the contrary, the diameter of the second light guide portion 25 is equal to that of the second light guide member 14.
If it is smaller than the diameter of, the light reaching the reflecting surface 27A near the emitting surface 10A is repeatedly reflected and advances to the pointer light receiving portion 23, and the straight light is reduced. Therefore, since the brightness of the pointer 5 is slightly lowered, it is desirable that the diameters of the second light guide portion 25 and the second light guide body 14 are substantially the same.
【００２２】なお、前記実施形態において、指針５や表
示板１２の前方側を覆う透視板１７を無色透明とした
が、例えば暗色系の透視板としても良い。この様にする
と、通常指針５は視認されなく、発光ダイオード７の点
灯によって指針５の指示部６が視認されることになる
が、指示部６がより明るく照明されているために、透過
率の低い透視板であっても十分な視認性が得られる。ま
た、図示しないが第１の導光体１３の固定は、例えば、
第１の導光体１３同士を接続する連結部２６に、表示板
用導光体１５に設けたと同様な係止爪を有する弾性片を
設けて、この係止爪を回路基板１の裏面に係止すること
により、第１の導光体１３を回路基板１に固定すれば良
い。Although the transparent plate 17 covering the hands 5 and the front side of the display plate 12 is colorless and transparent in the above embodiment, it may be a transparent plate of a dark color type. In this way, the pointer 5 is not normally visible, and the indicator 6 of the pointer 5 is visible due to the lighting of the light-emitting diode 7. However, since the indicator 6 is illuminated brighter, the transmittance of Even with a low see-through plate, sufficient visibility can be obtained. Although not shown, the first light guide 13 is fixed by, for example,
An elastic piece having locking claws similar to those provided in the light guide member 15 for a display plate is provided in the connecting portion 26 that connects the first light guides 13 to each other, and the locking claws are provided on the back surface of the circuit board 1. The first light guide 13 may be fixed to the circuit board 1 by being locked.
【００２３】[0023]
【発明の効果】以上詳述したように、本発明によれば、
発光ダイオード（光源）の光を出来るだけ多く第１の導
光体内に取り込み、かつ指針側に効率よく導いて指針を
より明るく照明することができる。As described in detail above, according to the present invention,
It is possible to take in as much light from the light emitting diode (light source) as possible into the first light guide body and efficiently guide it to the pointer side to illuminate the pointer brighter.
【図１】本発明の実施形態を適用した車両用計器の部分
断面図。FIG. 1 is a partial cross-sectional view of a vehicle instrument to which an embodiment of the present invention is applied.
【図２】同実施形態の第１の導光体を示す正面図。FIG. 2 is a front view showing a first light guide according to the same embodiment.
【図３】同実施形態の第１の導光体および第２の導光体
を示す断面図（光路説明図）。FIG. 3 is a cross-sectional view (optical path explanatory view) showing a first light guide and a second light guide of the same embodiment.
【図４】従来例の指針照明装置を示す断面図。FIG. 4 is a cross-sectional view showing a conventional pointer illumination device.
１ 回路基板 ５ 指針 ６ 指示部 ７，７Ａ 発光ダイオード（光源） ９，９Ａ，９Ｂ，９Ｃ 受光部 １３ 第１の導光体 １４ 第２の導光体 ２４ 第１導光部 ２５ 第２導光部 1 circuit board 5 guidelines 6 Indicator 7,7A light emitting diode (light source) 9,9A, 9B, 9C Light receiving part 13 First light guide 14 Second light guide 24 First Light Guide 25 Second light guide
Claims (3)
の光源と前記指針との間の前記光源側に配置され、光源
側が凹状の受光部を有する第１導光部で前記指針側が略
錐状の第２導光部とからなる第１の導光体と、前記指針
側に配置された略柱状の第２の導光体とを備えたことを
特徴とする指針照明装置。1. A pointer, a light source for illuminating the pointer, and a first light guide portion which is disposed on the light source side between the light source and the pointer and has a concave light receiving portion on the light source side, and the pointer side is substantially A pointer illuminating device comprising: a first light guide including a conical second light guide; and a substantially columnar second light guide arranged on the pointer side.
導光部が略円錐状で、前記第２の導光体が略円柱状であ
ることを特徴とする請求項１に記載の指針照明装置。2. The first light guide portion is substantially columnar, and the second light guide portion
The pointer illuminating device according to claim 1, wherein the light guide portion has a substantially conical shape, and the second light guide body has a substantially cylindrical shape.
径が一致していることを特徴とする請求項２に記載の指
針照明装置。3. The pointer lighting device according to claim 2, wherein the second light guide portion and the second light guide body have the same diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399573A JP3705206B2 (en) | 2001-12-28 | 2001-12-28 | Pointer illumination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001399573A JP3705206B2 (en) | 2001-12-28 | 2001-12-28 | Pointer illumination device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003194593A true JP2003194593A (en) | 2003-07-09 |
| JP3705206B2 JP3705206B2 (en) | 2005-10-12 |
Family
ID=27604542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001399573A Expired - Fee Related JP3705206B2 (en) | 2001-12-28 | 2001-12-28 | Pointer illumination device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3705206B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007121177A (en) * | 2005-10-31 | 2007-05-17 | Nippon Seiki Co Ltd | Indicating instrument |
| JP2007285850A (en) * | 2006-04-17 | 2007-11-01 | Yazaki Corp | Pointer of instrument |
-
2001
- 2001-12-28 JP JP2001399573A patent/JP3705206B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007121177A (en) * | 2005-10-31 | 2007-05-17 | Nippon Seiki Co Ltd | Indicating instrument |
| JP2007285850A (en) * | 2006-04-17 | 2007-11-01 | Yazaki Corp | Pointer of instrument |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3705206B2 (en) | 2005-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20030047868A (en) | Lighting device | |
| US5529014A (en) | Car-carried indicating device | |
| JP2008020387A (en) | Pointer apparatus | |
| JP2014009958A (en) | Pointer type instrument device | |
| JP3296045B2 (en) | Display device for vehicles | |
| JP2003194593A (en) | Pointer illuminator | |
| JPH10133607A (en) | Light guide unit and display device for vehicle | |
| JP2002296081A (en) | Light emitting pointer | |
| JP5060840B2 (en) | Luminous pointer instrument | |
| JPH10318801A (en) | Illuminating device for meter | |
| JP2005265835A (en) | Self-luminous pointer and pointing type display unit | |
| JP3494373B2 (en) | Instrument equipment | |
| JP3818229B2 (en) | Indicator lighting structure | |
| JP3052868B2 (en) | Instrument lighting device | |
| JP3779942B2 (en) | Meter device | |
| JP3793992B2 (en) | Pointer-type instrument | |
| JP2004144583A (en) | Measuring instrument with light-emitting pointer | |
| JP3401787B2 (en) | Pointer lighting device | |
| JP2005214754A (en) | Instrument device | |
| JP2009008395A (en) | Display device | |
| JP3779249B2 (en) | Vehicle instrument | |
| JP2009092462A (en) | Light-emitting pointer instrument | |
| JP3136589B2 (en) | Luminescent pointer and its lighting device | |
| JP5228254B2 (en) | Instrument device | |
| JP2004233241A (en) | Lighting device for measuring instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040818 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050629 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050705 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050718 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| LAPS | Cancellation because of no payment of annual fees |