JPH10132618A - Pointer illuminating device - Google Patents
Pointer illuminating deviceInfo
- Publication number
- JPH10132618A JPH10132618A JP28968596A JP28968596A JPH10132618A JP H10132618 A JPH10132618 A JP H10132618A JP 28968596 A JP28968596 A JP 28968596A JP 28968596 A JP28968596 A JP 28968596A JP H10132618 A JPH10132618 A JP H10132618A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting element
- light
- reflecting
- emitting elements
- 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.)
- Pending
Links
Landscapes
- Details Of Measuring Devices (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は例えば計器に適用さ
れる指針照明装置に関し、特に指針の照明意匠を暗色の
スモークパネルを通して使用者に視認させる高輝度照明
用の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 applied to, for example, an instrument, and more particularly to a pointer illuminating device for high-brightness illumination for allowing a user to visually recognize a lighting design of a pointer through a dark smoke panel.
【0002】[0002]
【従来の技術】従来、この種高輝度照明用の指針照明装
置として例えば特開平2−298818号公報に開示さ
れているように、指針自体に発光ダイオードチップから
なる小型の発光素子を搭載したものが知られていたが、
このように回動部材たる指針に発光素子を搭載したもの
は、発光素子への通電が難しく構造が複雑になってしま
うため、例えば特開平6−221879号公報に開示さ
れているように、透光性の指針の背後に計器本体の駆動
軸が貫通する回路基板を設け、この回路基板上に駆動軸
の軸心を中心とした同心円状に複数の発光素子(発光ダ
イオード)を配置し、これら発光素子の照明光にて指針
を光輝させるものが提案されている。2. Description of the Related Art Conventionally, as a pointer illuminating device of this kind for high-intensity illumination, a small luminous element composed of a light-emitting diode chip is mounted on the pointer itself as disclosed in, for example, Japanese Patent Application Laid-Open No. 2-298818. Was known,
In the case where the light emitting element is mounted on the pointer serving as the rotating member, it is difficult to energize the light emitting element, and the structure becomes complicated. For example, as disclosed in Japanese Patent Application Laid-Open No. 6-221879, a transparent member is used. A circuit board through which the drive shaft of the instrument body penetrates behind the light guide is provided, and a plurality of light-emitting elements (light-emitting diodes) are arranged on the circuit board in a concentric manner centered on the axis of the drive shaft. A device that shines a pointer with illumination light of a light emitting element has been proposed.
【0003】ところで特開平6−221879号公報に
開示の指針照明装置においては、発光素子の照明光を指
針に形成した反射面にて受光・反射させ、指針の指示部
を光輝させるようにし、この際、指針の反射面が複数の
発光素子のうち、常時2個以上の発光素子の光を受光す
るように工夫して、指針照明の高輝度化を図っている。In the pointer lighting device disclosed in Japanese Patent Application Laid-Open No. Hei 6-221879, illumination light of a light emitting element is received and reflected by a reflecting surface formed on the pointer, and a pointer of the pointer is illuminated. At this time, the reflecting surface of the pointer is devised so as to always receive the light of two or more of the plurality of light emitting elements among the plurality of light emitting elements, thereby increasing the brightness of the pointer illumination.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな指針照明装置によれば、確かに発光素子への通電が
容易で照明の高輝度化を図ることができるが、反射面が
2個以上の発光素子の光を常時受光するように発光素子
を配列する都合上、多くの発光素子を密集させて配置し
なければならず、発光素子の数が増加し、コスト高とな
ってしまう。またいくら発光素子を隙間なく並べても点
光源である以上、指針の回動位置に応じた発光ムラが生
じてしまうという問題がある。However, according to such a pointer illuminating device, it is certainly possible to easily energize the light emitting element and to increase the brightness of the illumination, but it is necessary to provide two or more reflecting surfaces. For convenience of arranging the light-emitting elements so as to always receive the light of the light-emitting elements, many light-emitting elements must be densely arranged, which increases the number of light-emitting elements and increases the cost. Also, no matter how many light emitting elements are arranged without gaps, there is a problem that light emission unevenness occurs according to the turning position of the pointer as long as it is a point light source.
【0005】本発明はこの点に鑑みてなされたもので、
必要最小限の発光素子で指針を明るく且つムラなく照明
でき、低コストで発光ムラを抑制し得る指針照明装置を
提供せんとするものである。[0005] The present invention has been made in view of this point,
It is an object of the present invention to provide a pointer illuminating device capable of illuminating a pointer brightly and evenly with a minimum necessary light emitting element, and capable of suppressing light emission unevenness at low cost.
【0006】[0006]
【課題を解決するための手段】本発明は、計器本体の駆
動軸にて軸回り駆動される透光性の指針を複数の発光素
子の照明光にて光輝させる指針照明装置であって、前記
発光素子は前記指針の背後に前記駆動軸の軸心を中心と
する略同心弧状の配列軌跡に沿って互いに隣接する前記
各発光素子が略等間隔となるように配置され、前記指針
は前記駆動軸の軸線方向に対し略直交する方向に長手状
に伸びる指示部とこの指示部の長手方向軸線に対応する
位置を中央部として前記指示部の後端側に形成される第
1の反射面とこの第1の反射面の両側方であってこれと
は互いに等間隔を有して前記指示部の後端側に形成され
る第2の反射面及び第3の反射面とで構成され各々が前
記発光素子の配列軌跡に応じて前記発光素子の照明光を
前記指示部に向けて反射するように配置される反射部と
を備え、前記発光素子の配列軌跡に対応する前記反射部
の幅寸法は略等間隔にて各々隣接する任意の3つの前記
発光素子のうち中央に位置する1つの発光素子の中心が
前記第1の反射部の中央部に対向するとき両脇に位置す
る他の2つの前記発光素子が前記第2,第3の反射部に
対向しないと共に前記任意の3つの発光素子のうち中央
に位置する前記発光素子が前記第1の反射部に対向しな
いとき中央に位置する前記発光素子及びこれと互いに隣
接する何れか一方の前記発光素子が前記第2,第3の反
射部の双方に各々対向するように設定されていることを
特徴とするものである。According to the present invention, there is provided a pointer illuminating apparatus for illuminating a translucent pointer driven around an axis by a drive shaft of an instrument main body with illumination light of a plurality of light emitting elements. The light emitting elements are arranged behind the hands so that the light emitting elements adjacent to each other are arranged at substantially equal intervals along a substantially concentric arc-shaped array locus about the axis of the drive shaft, and the hands are driven by the drive. An indicator extending longitudinally in a direction substantially perpendicular to the axis direction of the shaft, and a first reflecting surface formed on the rear end side of the indicator with a position corresponding to the longitudinal axis of the indicator as a center. It is composed of a second reflecting surface and a third reflecting surface formed on both sides of the first reflecting surface and at the same distance from each other and formed on the rear end side of the pointing portion. The illumination light of the light emitting element is directed to the indicator according to the arrangement locus of the light emitting element. A reflecting portion arranged so as to reflect light, wherein the width dimension of the reflecting portion corresponding to the arrangement trajectory of the light emitting element is located at the center of any three of the light emitting elements adjacent to each other at substantially equal intervals. When the center of one light-emitting element faces the center of the first reflector, the other two light-emitting elements located on both sides do not face the second and third reflectors, and the arbitrary three light-emitting elements do not face the second and third reflectors. When the light emitting element located at the center of the two light emitting elements does not face the first reflecting portion, the light emitting element located at the center and one of the light emitting elements adjacent to the light emitting element are the second and third light emitting elements. Are set so as to be opposed to both of the reflecting portions.
【0007】[0007]
【発明の実施の形態】本発明によると、発光素子は指針
の背後に駆動軸の軸心を中心とする略同心弧状の配列軌
跡に沿って互いに隣接する各発光素子が略等間隔となる
ように配置され、指針は駆動軸の軸線方向に対し略直交
する方向に長手状に伸びる指示部とこの指示部の長手方
向軸線に対応する位置を中央部として指示部の後端側に
形成される第1の反射面とこの第1の反射面の両側方で
あってこれとは互いに等間隔を有して指示部の後端側に
形成される第2の反射面及び第3の反射面とで構成され
各々が発光素子の配列軌跡に応じて発光素子の照明光を
前記指示部に向けて反射するように配置される反射部と
を備え、発光素子の配列軌跡に対応する反射部の幅寸法
は略等間隔にて各々隣接する任意の3つの発光素子のう
ち中央に位置する1つの発光素子の中心が第1の反射部
の中央部に対向するとき両脇に位置する他の2つの発光
素子が第2,第3の反射部に対向しないと共に任意の3
つの発光素子のうち中央に位置する発光素子が第1の反
射部に対向しないとき中央に位置する発光素子及びこれ
と互いに隣接する何れか一方の発光素子が第2,第3の
反射部の双方に各々対向するように設定されていること
により、指針は如何なる回動位置にあっても発光素子の
数を増やすことなく明るく且つ略ムラなく照明され、低
コストで発光ムラの少ない指針照明装置が得られる。According to the present invention, the light-emitting elements are arranged such that adjacent light-emitting elements are arranged at substantially equal intervals behind a pointer along a substantially concentric arc-shaped array locus centered on the axis of a drive shaft. The pointer is formed on the rear end side of the indicating portion with a pointing portion extending longitudinally in a direction substantially perpendicular to the axis direction of the drive shaft and a position corresponding to the longitudinal axis of the pointing portion as a center portion. A first reflecting surface and a second reflecting surface and a third reflecting surface formed on both sides of the first reflecting surface and at the rear end side of the indicating portion at equal intervals from each other; And a reflector arranged to reflect the illumination light of the light emitting element toward the indicator according to the arrangement locus of the light emitting element, and the width of the reflector corresponding to the arrangement locus of the light emitting element The dimensions are located at the center of any three light emitting elements adjacent to each other at substantially equal intervals Any 3 with the center of the One of the light emitting element other two light-emitting elements located on both sides when facing the middle of the first reflecting part is not opposed to the second, third reflecting portion
When the light emitting element located at the center of the two light emitting elements does not face the first reflecting portion, the light emitting element located at the center and one of the light emitting elements adjacent to the light emitting element are both the second and third reflecting portions. The hands are illuminated brightly and almost uniformly without increasing the number of light emitting elements at any rotational position by being set to face each other. can get.
【0008】[0008]
【実施例】以下、添付図面に基づいて本発明の実施例を
説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【0009】図1は、本発明の第1実施例に係わる指針
照明装置の分解斜視図、図2は組み付け状態を示す断面
図、図3は指針と発光素子の関係を示す正面図、図4,
図5は指針の回動に応じた反射部と発光素子との関係を
示す説明図である。FIG. 1 is an exploded perspective view of a pointer illuminating device according to a first embodiment of the present invention, FIG. 2 is a sectional view showing an assembled state, FIG. 3 is a front view showing a relationship between the pointer and a light emitting element, and FIG. ,
FIG. 5 is an explanatory diagram showing the relationship between the reflecting portion and the light emitting element according to the rotation of the pointer.
【0010】本実施例による指針照明装置は、図1に示
すように、例えば車両速度などの計測両に応じて駆動軸
1を回動駆動させる交差コイル式計器からなる計器本体
2の前方に、駆動軸1が貫通した状態で配置される回路
基板3と、この回路基板3から貫通する計器本体2の駆
動軸1の先端に固定される台座状の連結部材4と、この
連結部材4を通じて駆動軸1に連結固定され駆動軸1の
回動に応じて軸回り回動する指針5と、この指針5の後
述する回転中心基部前方及びその周囲を覆うカップ状且
つ遮光性の指針キャップ6とを備える。As shown in FIG. 1, the pointer lighting device according to the present embodiment is provided in front of an instrument main body 2 composed of a cross-coil instrument for rotating a drive shaft 1 in accordance with both measurements such as a vehicle speed. A circuit board 3 disposed with the drive shaft 1 penetrating therethrough, a pedestal-shaped connecting member 4 fixed to the tip of the drive shaft 1 of the instrument body 2 penetrating from the circuit board 3, and driving through the connecting member 4 A pointer 5 that is connected and fixed to the shaft 1 and rotates around the axis in accordance with the rotation of the drive shaft 1, and a cup-shaped and light-shielding pointer cap 6 that covers the front of and around the rotation center base of the pointer 5, which will be described later. Prepare.
【0011】回路基板3は、図1,図2に示すように、
駆動軸1が貫通する貫通孔31の周囲に複数(6個)の
発光素子7(7a〜7f)を有し、計器本体2の前方に
固定されている。The circuit board 3 is, as shown in FIGS.
A plurality of (six) light emitting elements 7 (7a to 7f) are provided around a through hole 31 through which the drive shaft 1 penetrates, and are fixed in front of the instrument main body 2.
【0012】このように回路基板3上に設けられた発光
素子7(7a〜7f)は、例えば何れも発光ダイオード
チップからなり、図3に示すように、回路基板3の貫通
孔31の周囲に、駆動軸1の軸心Pを中心とする略同心
弧状の配列軌跡Rに沿って互いに隣接する各発光素子7
a〜7fの全てが略等間隔(60度間隔)となるように
配置されている。Each of the light emitting elements 7 (7a to 7f) provided on the circuit board 3 is, for example, formed of a light emitting diode chip, and is provided around the through hole 31 of the circuit board 3 as shown in FIG. The light emitting elements 7 adjacent to each other along a substantially concentric arc-shaped array locus R centered on the axis P of the drive shaft 1.
All of a to 7f are arranged at substantially equal intervals (60-degree intervals).
【0013】連結部材4は、遮光性材料からなり、駆動
軸1の先端に圧入固定されるボス部41と、このボス部
41の前方で図1,2中、水平方向に広がり指針5を載
置すると共に各発光素子7a〜7fの配列軌跡R(図3
参照)よりもやや径大で各発光素子7a〜7fの前方を
覆う円盤状の載置部42とを備え、搭載部42の後方に
は後述する指針5の反射部に対応した開口部43が形成
されている。The connecting member 4 is made of a light-shielding material, and has a boss 41 press-fitted and fixed to the tip of the drive shaft 1 and a pointer 5 extending in the horizontal direction in FIGS. And the arrangement locus R of the light emitting elements 7a to 7f (see FIG. 3).
And a disk-shaped mounting portion 42 which is slightly larger in diameter than the light-emitting elements 7a to 7f and covers the front of each of the light emitting elements 7a to 7f, and an opening 43 corresponding to a reflecting portion of the pointer 5 described later is provided behind the mounting portion 42. Is formed.
【0014】指針5は、アクリル,ポリカーボネートな
どの透光性樹脂材料からなり、連結部材4の載置部42
に固定される回転中心基部51と、この回転中心基部5
1から一体に駆動軸1の軸線方向に対し略直交する方向
に長手状に伸びると共に図1,2中、指針5の背後に配
置され一点鎖線で示した計器文字板8の図示しない所定
の指標部を指示する指示部52と、指示部52(回転中
心基部51)の後方に3分割形成され各々が指示部52
の所定部に共通の集光点を有する3つの略円錐面状の反
射面53〜55からなる反射部56とを備えており、こ
の場合、指示部52の背面には、光反射性の塗装が施さ
れている。The pointer 5 is made of a translucent resin material such as acrylic or polycarbonate.
The rotation center base 51 fixed to the
1 and a predetermined index (not shown) of the instrument dial 8 which extends in the direction substantially perpendicular to the axial direction of the drive shaft 1 and is disposed behind the pointer 5 in FIGS. An instruction unit 52 for designating a part, and an instruction unit 52 (rotation center base 51) divided into three portions, each of which is formed behind the instruction unit 52.
And a reflecting portion 56 including three substantially conical reflecting surfaces 53 to 55 having a common light condensing point at a predetermined portion of the pointing portion 52. In this case, a light-reflective coating Is given.
【0015】反射部56のうち、第1の反射面53は、
図3に示すように、指示部52の長手方向軸線Lに対応
する位置をその中央部Cとして指示部52(回転中心基
部51)の後端側に形成され、第2の反射面54及び第
3の反射面55は、第1の反射面53の中央部Cを基準
(中央)として第1の反射面53の両側方であって第1
の反射面53とは互いに等間隔を有して指示部52(回
転中心基部51)の後端側に形成されており、これら第
1〜第3の反射面53〜55は、各々が発光素子7(7
a〜7f)の配列軌跡Rに応じて発光素子7(7a〜7
f)の照明光を指示部52に向けて反射するように配置
されている。The first reflecting surface 53 of the reflecting portion 56
As shown in FIG. 3, a position corresponding to the longitudinal axis L of the pointing portion 52 is formed as a center portion C on the rear end side of the pointing portion 52 (the rotation center base 51), and the second reflecting surface 54 and the second The third reflecting surface 55 is located on both sides of the first reflecting surface 53 with the central portion C of the first reflecting surface 53 as a reference (center),
Are formed at the rear end side of the pointing portion 52 (rotation center base 51) at equal intervals to the reflection surface 53 of the light-emitting element, and the first to third reflection surfaces 53 to 55 are each formed of a light emitting element. 7 (7
a to 7f) according to the arrangement locus R of the light emitting elements 7 (7a to 7f).
The illumination light of f) is disposed so as to be reflected toward the instruction unit 52.
【0016】このように構成された指針照明装置にあっ
て、連結部材4,指針5,指針キャップ6は、計器本体
2の駆動軸1への固定前に予め組み合わされて指針アッ
センブリーを構成し、回路基板3及び計器文字板8を固
定した計器本体2の駆動軸1に装着され、回転駆動され
ると共に、連結部材4の開口部43を通じて発光素子7
(7a〜7f)の照明光を指針5の反射部56に取り入
れ、この部分で照明光を指示部52側に反射して指示部
52を光輝させるようになっている。In the pointer illuminating device thus configured, the connecting member 4, the pointer 5, and the pointer cap 6 are combined in advance before the instrument main body 2 is fixed to the drive shaft 1, to form a pointer assembly. The light emitting element 7 is mounted on the drive shaft 1 of the instrument main body 2 to which the circuit board 3 and the instrument dial 8 are fixed, and is driven to rotate, and through the opening 43 of the connecting member 4.
The illumination light of (7a to 7f) is introduced into the reflecting portion 56 of the pointer 5, and the illumination light is reflected toward the indicating portion 52 at this portion to shine the indicating portion 52.
【0017】ここで、図3に基づいて指針5の反射部5
3と発光素子7(7a〜7f)との関係について詳しく
説明すると、前述のように、発光素子7(7a〜7f)
は配列軌跡Rに沿って配置されており、この際、発光素
子7(7a〜7f)の配列軌跡Rに対応する反射部56
の幅寸法Wは、略等間隔にて各々隣接する任意の3つの
発光素子7a,7b,7cのうち中央に位置する発光素
子7bの中心Xが第1の反射面53の中央部Cに対向す
るとき(後述する図4(a),図5(a)参照)、両脇
に位置する他の2つの発光素子7a,7cが第2,第3
の反射面54,55の双方に対向しないと共に、中央に
位置する発光素子7bが第1の反射部53に対向しない
とき(図4,図5の各(f),(g)参照)、その発光
素子7b及びこの発光素子7bと互いに隣接する何れか
一方の発光素子7a,7cの合計2つが第2,第3の反
射部54,55の双方に各々対向するように設定されて
いる。Here, the reflecting portion 5 of the pointer 5 will be described with reference to FIG.
The relationship between the light emitting element 7 (7a to 7f) and the light emitting element 7 (7a to 7f) will be described in detail.
Are arranged along the arrangement locus R. At this time, the reflecting portions 56 corresponding to the arrangement locus R of the light emitting elements 7 (7a to 7f)
Of the three light emitting elements 7a, 7b, 7c adjacent to each other at substantially equal intervals, the center X of the light emitting element 7b located at the center faces the central part C of the first reflection surface 53. (See FIGS. 4 (a) and 5 (a), which will be described later), the other two light emitting elements 7a and 7c located on both sides are the second and third light emitting elements.
When the light-emitting element 7b located at the center does not face the first reflecting portion 53 (see (f) and (g) in FIG. 4 and FIG. 5), A total of two of the light emitting element 7b and one of the light emitting elements 7a and 7c adjacent to the light emitting element 7b are set to face both the second and third reflecting portions 54 and 55, respectively.
【0018】図4(a)〜(g)は、図3に示した反射
部56と発光素子7(7a〜7f)との位置関係(図4
(a))を基準にして指針5が時計方向に5度づつ回動
する場合を示し、図5(a)〜(g)は、図3に示した
反射部56と発光素子7(7a〜7f)との位置関係
(図4(a))を基準にして指針5が反時計方向に5度
づつ回動する場合を示しおり、以下、図4(a)〜
(g),図5(a)〜(g)に基づいて指針5の回動に
応じた反射部56と発光素子7(7a〜7f)との位置
関係を説明する。FIGS. 4A to 4G show the positional relationship between the reflector 56 and the light emitting elements 7 (7a to 7f) shown in FIG.
5A shows a case where the pointer 5 rotates clockwise by 5 degrees on the basis of (a)). FIGS. 5A to 5G show the reflecting portion 56 and the light emitting element 7 (7a to 7A) shown in FIG. 7f) shows a case where the pointer 5 rotates by 5 degrees in a counterclockwise direction with reference to the positional relationship (FIG. 4 (a)).
(G), the positional relationship between the reflector 56 and the light emitting elements 7 (7a to 7f) according to the rotation of the pointer 5 will be described based on FIGS. 5 (a) to 5 (g).
【0019】まず、図4を説明すると、図4(a)で
は、反射部56と対向する発光素子7(7a〜7f)
は、発光素子7bのみであり、この場合、図3にて説明
したように、発光素子7bの中心Xと第1の反射面53
の中央部Cとが一致する。First, FIG. 4 will be described. In FIG. 4 (a), the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are shown.
Is only the light emitting element 7b. In this case, as described with reference to FIG. 3, the center X of the light emitting element 7b and the first reflection surface 53
And the central part C of the two.
【0020】同図(b)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bは第1の反射面53の
中央部Cより回転方向後方側にややずれた部分と対向
し、また発光素子7cはその一部が第3の反射面55の
回転方向先頭側端部と対向する。In FIG. 2B, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c. In this case, the light emitting element 7b is the first reflecting surface 53. The light-emitting element 7c partially faces the rotation-direction leading end of the third reflection surface 55 in the rotation direction.
【0021】同図(c)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bは第1の反射面53の
回転方向後方側端部と対向し、また発光素子7cはその
半分よりもやや多い領域が第3の反射面55の回転方向
先頭側端部と対向する。In FIG. 3C, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c. In this case, the light emitting element 7b is the first reflecting surface 53. The light emitting element 7c has a region slightly larger than half of the light emitting element 7c facing the rotationally leading end of the third reflection surface 55.
【0022】同図(d)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bはその半分よりもやや
多い領域が第1の反射面53の回転方向後方側端部と対
向し、また発光素子7cは第3の反射面55の中心より
も回転方向先頭側にずれた位置と対向する。In FIG. 2D, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c. In this case, the number of the light emitting elements 7b is slightly more than half. The region faces the rear end of the first reflection surface 53 in the rotation direction, and the light emitting element 7c faces a position shifted from the center of the third reflection surface 55 to the top in the rotation direction.
【0023】同図(e)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bはその半分弱の領域が
第2の反射面54の回転方向先頭側端部と対向すると共
にそのわずかな一部が第1の反射面53の回転方向後方
側端部と対向し、また発光素子7cは第3の反射面55
の中心よりもわずかにずれた位置と対向する。In FIG. 3E, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two of the light emitting elements 7b and 7c. The second reflecting surface 54 faces the leading end in the rotating direction and a small part thereof faces the rotating rear end of the first reflecting surface 53, and the light emitting element 7c is connected to the third reflecting surface. 55
And a position slightly deviated from the center.
【0024】同図(f)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bは第2の反射面54の
回転方向先頭側端部と対向し、また発光素子7cは第3
の反射面55の略中心と対向し、一方、第1の反射面5
3には何れの発光素子7(7a〜7f)も対向しない。In FIG. 3F, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c. In this case, the light emitting element 7b is connected to the second reflecting surface 54. And the light emitting element 7c is the third end in the rotation direction.
Of the first reflecting surface 5
No light emitting element 7 (7 a to 7 f) faces 3.
【0025】同図(g)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であり、この場合、発光素子7bはその中央よりも第2
の反射面54の回転方向先頭側に対向し、また発光素子
7cは第3の反射面55の中心よりも回転方向後方側に
対向し、一方、第1の反射面53には何れの発光素子7
(7a〜7f)も対向せず、その中心部Cは発光素子7
bと発光素子7cの略中間に位置する。In FIG. 5G, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two of the light emitting elements 7b and 7c. In this case, the light emitting element 7b is located at the second position from the center thereof.
The light-emitting element 7c faces the rotation-direction rear side of the center of the third reflection surface 55, while the light-emitting element 7c faces the first reflection surface 53. 7
(7a to 7f) also do not face each other, and the central portion C is the light emitting element 7
It is located approximately in the middle between b and the light emitting element 7c.
【0026】つぎに図5については、図5(a)では、
図4(a)と同様であり、同図(b)〜(f)では、第
4図(b)〜(f)の逆であって、反射部56と発光素
子7(7a〜7f)との関係については、図示した通
り、第4図(c)〜(f)と実質的に同様であるので、
詳しい説明は省略する。Next, referring to FIG. 5, in FIG.
FIG. 4A is the same as FIG. 4B, and FIG. 4B to FIG. 4F are the reverse of FIG. 4B to FIG. 4F, in which the reflecting portion 56 and the light emitting element 7 (7a to 7f) Is substantially the same as that shown in FIGS. 4 (c) to (f),
Detailed description is omitted.
【0027】このように、反射部56に対向する発光素
子7(7a〜7f)の数は、指針5の回動位置によって
異なるが、本発明の発明者による実験によると、中央に
位置する第1の反射面53を通じて反射された発光素子
7(7a〜7f)の照明光にて指示部52を光輝させる
場合と、両脇に位置する第2,第3の反射面54,55
を通じて反射された発光素子7(7a〜7f)の照明光
にて指示部52を光輝させる場合とでは、反射される照
明光の光量が同じであっても、指示部52に対する照明
効率に差があり、第1の反射面53においては、その中
央部Cにて反射された照明光にて指示部52を光輝させ
る場合が最も効率が高く明るい照明が可能で、中央部C
から両端側に遠ざかるに従って照明光率が少しずつ落
ち、第2,第3の反射面54,55においては、第1の
反射面53に近い側ほど照明効率が高く、両端側に遠ざ
かるに従って照明光率が少しずつ落ちることが分かり、
総じて第1の反射面53の方が第2,第3の反射面5
4,55よりも照明効率が高く、これら反射面53〜5
5の中でも指示部52の長手方向軸線に近いほど照明効
率が高いことが分かった。これは、第1〜第3の反射面
53〜55によりこれらから反射されて指示部52の先
端側へと向かう光路に差があるためで、第1の反射面5
3から反射される照明光は、略直線状もしくは指示部5
2側面を通じての反射回数が少ない光路にて指示部52
の先端側に向かうため照明光の損出が少ないが、第2,
第3の反射面54,55から反射される照明光は、第1
の反射面53から反射される照明光に比べると指示部5
2側面を通じての反射回数の多い光路にて指示部52の
先端側に向かうため照明光の損出が多くなるためと考え
られる。As described above, the number of the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 varies depending on the turning position of the pointer 5, but according to an experiment by the inventor of the present invention, the number of the light emitting element 7 located at the center is changed. The case where the indicator 52 is illuminated by the illumination light of the light emitting element 7 (7a to 7f) reflected through the first reflecting surface 53, and the second and third reflecting surfaces 54 and 55 located on both sides.
In the case where the indicator 52 is illuminated by the illumination light of the light emitting elements 7 (7a to 7f) reflected through the light source, there is a difference in illumination efficiency with respect to the indicator 52 even if the amount of reflected illumination light is the same. In the first reflection surface 53, the most efficient and bright illumination is possible when the indicator 52 is illuminated by the illumination light reflected at the central portion C.
Of the second and third reflecting surfaces 54 and 55, the illumination efficiency increases as the distance from the first reflecting surface 53 increases, and the illuminating light increases as the distance from the both ends increases. You can see that the rate drops little by little,
Generally, the first reflecting surface 53 is the second and third reflecting surfaces 5.
The lighting efficiency is higher than that of the reflective surfaces 53 to 5.
5, it was found that the closer to the longitudinal axis of the indicator 52, the higher the illumination efficiency. This is because there is a difference in an optical path reflected from the first to third reflecting surfaces 53 to 55 toward the front end of the pointing unit 52, and the first reflecting surface 5
The illumination light reflected from the light source 3 is substantially linear or the indicator 5
Instructing section 52 in an optical path with a small number of reflections through two side surfaces
The loss of illumination light is small because it goes to the tip side of
The illumination light reflected from the third reflecting surfaces 54 and 55
Of the indicator 5 compared to the illumination light reflected from the reflection surface 53
It is considered that the loss of the illumination light increases because the light travels toward the distal end side of the pointing unit 52 in the optical path having a large number of reflections through the two side surfaces.
【0028】この点をふまえて図4(a)〜(g)を説
明すると、図4(a)では、反射部56と対向する発光
素子7(7a〜7f)は、発光素子7bのみであるが、
発光素子7bの中心Xと第1の反射面53の中央部Cと
が一致するため、照明効率が高く、一つの発光素子7
(7a〜7f)であっても略満足のいく指示部52の照
明が可能となる。4 (a) to 4 (g) will be described based on this point. In FIG. 4 (a), the light emitting element 7 (7a to 7f) facing the reflecting portion 56 is only the light emitting element 7b. But,
Since the center X of the light emitting element 7b coincides with the central portion C of the first reflecting surface 53, the illumination efficiency is high and one light emitting element 7b
Even with (7a to 7f), the illumination of the instruction unit 52 can be substantially satisfied.
【0029】図4(b)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bは第1の反射面53の中央部C
より回転方向後方側にややずれた部分と対向し、また発
光素子7cはその一部が第3の反射面55の回転方向先
頭側端部と対向するため、発光素子7bが第1の反射面
53の中央部Cより回転方向後方側にずれることによる
照明効率の低下ぶんを、第3の反射面55の回転方向先
頭側端部と一部が対向する発光素子7cの照明光により
補うことにより、換言すると、第3の反射面55により
導かれる発光素子7cの照明光と第1の反射面53を通
じて導かれる発光素子7bの照明光とを合わせて指示部
52を照明することにより、図4(a)と略均等な明る
さの指示部52の照明が可能となる。In FIG. 4B, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c, but the light emitting element 7b is located at the center of the first reflecting surface 53. Part C
The light emitting element 7c is opposed to a part slightly shifted rearward in the rotation direction, and a part of the light emitting element 7c is opposed to the end of the third reflection surface 55 in the rotation direction. The lowering of the illumination efficiency due to the shift in the rotation direction rearward from the central portion C of 53 is compensated for by the illumination light of the light emitting element 7c partly opposed to the rotation direction leading end of the third reflection surface 55. In other words, the indicator 52 is illuminated by combining the illumination light of the light-emitting element 7c guided by the third reflection surface 55 and the illumination light of the light-emitting element 7b guided by the first reflection surface 53, and thereby, as shown in FIG. Illumination of the indicator 52 having substantially the same brightness as that of FIG.
【0030】図4(c)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bは第1の反射面53の回転方向
後方側端部と対向し、また発光素子7cはその半分より
もやや多い領域が第3の反射面55の回転方向先頭側端
部と対向するため、発光素子7bが第1の反射面53の
回転方向後方側端部と対向することによる照明効率の低
下ぶんを、第3の反射面55の回転方向先頭側端部とそ
の半分よりもやや多い領域が対向する発光素子7cの照
明光により補うことにより、換言すると、第3の反射面
55により導かれる発光素子7cの照明光と第1の反射
面53を通じて導かれる発光素子7bの照明光とを合わ
せて指示部52を照明することにより、図4(a),
(b)と略均等な明るさの指示部52の照明が可能とな
る。In FIG. 4C, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c, but the light emitting element 7b rotates the first reflecting surface 53. In the light emitting element 7c, since a region slightly larger than half of the light emitting element 7c faces the rotation direction leading end of the third reflecting surface 55, the light emitting element 7b is connected to the first reflecting surface 53. The lowering of the illumination efficiency due to the opposition to the rear end in the rotation direction is caused by the illumination light of the light emitting element 7c in which the rotation direction front end of the third reflection surface 55 and a region slightly larger than half thereof are opposed. By supplementing, in other words, by illuminating the indicator 52 by combining the illumination light of the light emitting element 7c guided by the third reflecting surface 55 and the illumination light of the light emitting element 7b guided through the first reflecting surface 53 , FIG. 4 (a),
Illumination of the instruction unit 52 having substantially the same brightness as that of FIG.
【0031】図4(d)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bはその半分よりもやや多い領域
が第1の反射面53の回転方向後方側端部と対向し、発
光素子7cは第3の反射面55の中心よりも回転方向先
頭側にずれた位置と対向するため、発光素子7bの半分
よりもやや多い領域が第1の反射面53の回転方向後方
側端部と対向することによる照明効率の低下ぶんを、第
3の反射面55の中心よりも回転方向先頭側にずれた位
置と対向する発光素子7cの照明光により補うことによ
り、換言すると、第3の反射面55により導かれる発光
素子7cの照明光と第1の反射面53を通じて導かれる
発光素子7bの照明光とを合わせて指示部52を照明す
ることにより、図4(a),(b),(c)と略均等な
明るさの指示部52の照明が可能となる。In FIG. 4D, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two of the light emitting elements 7b and 7c, but the light emitting element 7b has an area slightly larger than half of the light emitting elements 7b and 7c. Since the light-emitting element 7c is opposed to the rear end of the first reflection surface 53 in the rotation direction, and the light-emitting element 7c is opposed to a position shifted from the center of the third reflection surface 55 to the head in the rotation direction, the light-emitting element 7c is more than half the light-emitting element 7b. The lowering of the illumination efficiency due to the slightly larger area facing the rear end of the first reflection surface 53 in the rotation direction is opposed to the position shifted to the rotation direction top side from the center of the third reflection surface 55. In other words, the illumination light of the light emitting element 7c guided by the third reflecting surface 55 and the illumination light of the light emitting element 7b guided through the first reflecting surface 53 are combined by supplementing with the illumination light of the light emitting element 7c. By illuminating the indicator 52, (A), it is possible to lighting (b), an instruction unit 52 of substantially uniform brightness and (c).
【0032】図4(e)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bはその半分弱の領域が第2の反
射面54の回転方向先頭側端部と対向すると共にそのわ
ずかな一部が第1の反射面53の回転方向後方側端部と
対向し、また発光素子7cは第3の反射面55の中心よ
りもわずかにずれた位置と対向するため、発光素子7b
の半分弱の領域が第2の反射面54の回転方向先頭側端
部と対向すると共にそのわずかな一部が第1の反射面5
3の回転方向後方側端部と対向することによる照明効率
の低下ぶんを、第3の反射面55の中心よりもわずかに
ずれた位置と対向する発光素子7cの照明光により補う
ことにより、換言すると、第3の反射面55により導か
れる発光素子7cの照明光と第1,第2の反射面53,
54を通じて導かれる発光素子7bの照明光とを合わせ
て指示部52を照明することにより、図4(a),
(b),(c),(d)と略均等な明るさの指示部52
の照明が可能となる。In FIG. 4E, the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two of the light emitting elements 7b and 7c. The light-emitting element 7c is opposed to the rotation-direction rear end of the first reflection surface 53, and the light-emitting element 7c is opposed to the rotation-direction rear end of the first reflection surface 53. The light emitting element 7b is opposed to a position slightly shifted from the center.
Of the second reflecting surface 54 is opposed to the end of the second reflecting surface 54 in the rotational direction, and a small part thereof is the first reflecting surface 5.
3 is compensated for by the illumination light of the light emitting element 7c opposed to a position slightly shifted from the center of the third reflection surface 55, by compensating for the decrease in illumination efficiency caused by opposing the rear end of the third reflection direction. Then, the illumination light of the light emitting element 7c guided by the third reflecting surface 55 and the first and second reflecting surfaces 53,
By illuminating the indicator 52 with the illumination light of the light emitting element 7b guided through 54, FIG.
(B), (c), (d), an indicator 52 having substantially the same brightness
Lighting becomes possible.
【0033】図4(f)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bは第2の反射面54の回転方向
先頭側端部と対向し、発光素子7cは第3の反射面55
の略中心と対向し、第1の反射面53には何れの発光素
子7(7a〜7f)も対向しないため、第1の反射面5
3が何れの発光素子7(7a〜7f)にも対向せず、且
つ発光素子7cが第3の反射面55の略中心と対向する
ことによる照明効率の低下ぶんを、第2の反射面54の
回転方向先頭側端部と対向する発光素子7bの照明光に
より補うことにより、換言すると、第3の反射面55に
より導かれる発光素子7cの照明光と第2の反射面54
を通じて導かれる発光素子7bの照明光とを合わせて指
示部52を照明することにより、図4(a),(b),
(c),(d),(e)と略均等な明るさの指示部52
の照明が可能となる。In FIG. 4F, the light-emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light-emitting elements 7b and 7c, but the light-emitting element 7b rotates the second reflection surface 54. The light-emitting element 7c faces the third end of the third reflection surface 55.
, And none of the light emitting elements 7 (7 a to 7 f) face the first reflecting surface 53, so that the first reflecting surface 5
3 is not opposed to any of the light-emitting elements 7 (7a to 7f), and the light-emitting element 7c is opposed to substantially the center of the third reflection surface 55. In other words, the illumination light of the light emitting element 7c guided by the third reflecting surface 55 and the second reflecting surface 54
4 (a), 4 (b), and 4 (b) by illuminating the indicator 52 with the illumination light of the light emitting element 7b guided through
(C), (d), and (e), an indicator 52 having substantially the same brightness.
Lighting becomes possible.
【0034】図4(f)では、反射部56と対向する発
光素子7(7a〜7f)は、発光素子7b,7cの2つ
であるが、発光素子7bはその中央よりも第2の反射面
54の回転方向先頭側に対向し、発光素子7cは第3の
反射面55の中心よりも回転方向後方側に対向し、一
方、第1の反射面53には何れの発光素子7(7a〜7
f)も対向しないため、第1の反射面53が何れの発光
素子7(7a〜7f)にも対向せず、且つ発光素子7b
が第2の反射面54の中央よりも回転方向先頭側に対向
することによる照明効率の低下ぶんを、第3の反射面5
5の中心よりも回転方向後方側と対向する発光素子7c
の照明光により補うことにより、換言すると、第3の反
射面55により導かれる発光素子7cの照明光と第2の
反射面54を通じて導かれる発光素子7bの照明光とを
合わせて指示部52を照明することにより、図4
(a),(b),(c),(d),(e)と略均等な明
るさの指示部52の照明が可能となる。In FIG. 4 (f), the light emitting elements 7 (7a to 7f) facing the reflecting portion 56 are two light emitting elements 7b and 7c. The light emitting element 7c is opposed to the front side in the rotation direction of the surface 54, and the light emitting element 7c is opposed to the rear side in the rotation direction from the center of the third reflection surface 55. On the other hand, any of the light emitting elements 7 (7a ~ 7
f) does not face, the first reflection surface 53 does not face any of the light emitting elements 7 (7a to 7f), and the light emitting element 7b
Decrease in the lighting efficiency due to the fact that it faces the rotation direction leading side of the center of the second reflecting surface 54, the third reflecting surface 5
Light-emitting element 7c facing the rear side in the rotation direction from the center of 5
In other words, the indicator 52 is combined with the illumination light of the light-emitting element 7c guided by the third reflection surface 55 and the illumination light of the light-emitting element 7b guided by the second reflection surface 54. By illuminating, FIG.
(A), (b), (c), (d), and (e) can be illuminated by the indicator 52 with substantially the same brightness.
【0035】なお図5(a)〜(f)においても、上述
の作用は図4(a)〜(f)と実質的に同様であり、詳
しい説明は省略する。5A to 5F, the operation described above is substantially the same as that of FIGS. 4A to 4F, and a detailed description thereof will be omitted.
【0036】以上、詳述したように本実施例によれば、
発光素子7(7a〜7f)は指針5の背後に駆動軸1の
軸心Pを中心とする略同心弧状の配列軌跡Rに沿って互
いに隣接する各発光素子7(7a〜7f)が略等間隔と
なるように配置され、指針5は駆動軸1の軸線方向に対
し略直交する方向に長手状に伸びる指示部52とこの指
示部52の長手方向軸線Lに対応する位置を中央部Cと
して指示部52(回転中心基部51)の後端側に形成さ
れる第1の反射面53とこの第1の反射面53の両側方
であってこれとは互いに等間隔を有して指示部52(回
転中心基部51)の後端側に形成される第2の反射面5
4及び第3の反射面55とで構成され各々が発光素子7
(7a〜7f)の配列軌跡Rに応じて発光素子7(7a
〜7f)の照明光を指示部52に向けて反射するように
配置される反射部56とを備え、発光素子7(7a〜7
f)の配列軌跡Rに対応する反射部56の幅寸法Wは略
等間隔にて各々隣接する任意の3つの発光素子7(7a
〜7c)のうち中央に位置する1つの発光素子7bの中
心が第1の反射部53の中央部Cに対向するとき、両脇
に位置する他の2つの発光素子7a,7cが第2,第3
の反射部54,55に対向しないと共に3つの発光素子
7(7a〜7c)のうち中央に位置する発光素子7bが
第1の反射部53に対向しないとき、中央に位置する発
光素子7b及びこれと互いに隣接する何れか一方の発光
素子7a,7cが第2,第3の反射部54,55の双方
に各々対向するように設定されていることにより、指針
5は如何なる回動位置にあっても、発光素子7(7a〜
7f)の配列密度を高めることで発光素子7(7a〜7
f)の数を増やすことなく指針を明るく且つ略ムラなく
照明することができ、低コストで発光ムラの少ない指針
照明装置を得ることができる。As described above, according to this embodiment,
The light-emitting elements 7 (7a to 7f) are substantially equal to each other behind the hands 5 along the substantially concentric arc-shaped trajectory R centered on the axis P of the drive shaft 1. The pointers 5 are arranged so as to be spaced from each other, and the pointer 5 has a pointing portion 52 extending longitudinally in a direction substantially perpendicular to the axial direction of the drive shaft 1 and a position corresponding to the longitudinal axis L of the pointing portion 52 as a center portion C. The first reflecting surface 53 formed on the rear end side of the pointing portion 52 (the rotation center base portion 51) and the both sides of the first reflecting surface 53, and the pointing portions 52 are equally spaced from each other. (Rotation center base 51) Second reflection surface 5 formed on the rear end side
4 and a third reflecting surface 55, each of which is a light emitting element 7
The light emitting element 7 (7a) according to the array locus R of (7a to 7f)
And a reflecting portion 56 arranged to reflect the illumination light of the light emitting elements 7 (7a to 7f).
f) The width dimension W of the reflecting portion 56 corresponding to the array locus R is set to any three adjacent light emitting elements 7 (7a) at substantially equal intervals.
7c), when the center of one light emitting element 7b located at the center faces the center part C of the first reflecting portion 53, the other two light emitting elements 7a and 7c located on both sides are the second and the second light emitting elements 7a and 7c. Third
When the light emitting element 7b located at the center of the three light emitting elements 7 (7a to 7c) does not face the first reflecting section 53, the light emitting element 7b located at the center and Is set so that one of the light emitting elements 7a and 7c adjacent to each other is opposed to both the second and third reflecting portions 54 and 55, so that the pointer 5 is at any rotational position. Also, the light emitting element 7 (7a-
By increasing the array density of 7f), the light emitting elements 7 (7a to 7
It is possible to illuminate the pointer brightly and substantially without unevenness without increasing the number of steps f), and it is possible to obtain a pointer illuminating device that is low in cost and has little emission unevenness.
【0037】なお本実施例では、各発光素子7(7a〜
7f)を略等間隔に360度にわたって配列する場合を
示したが、必ずしも360度にわたって配列しなくとも
よく、指針5の回動範囲に応じて例えば270度にわた
って配列してもよい。In this embodiment, each light emitting element 7 (7a to 7a)
Although the case where 7f) is arranged at substantially equal intervals over 360 degrees has been shown, it is not always necessary to arrange them over 360 degrees, and they may be arranged over, for example, 270 degrees according to the rotation range of the hands 5.
【0038】[0038]
【発明の効果】以上詳述したように、本発明は、計器本
体の駆動軸にて軸回り駆動される透光性の指針を複数の
発光素子の照明光にて光輝させる指針照明装置であっ
て、前記発光素子は前記指針の背後に前記駆動軸の軸心
を中心とする略同心弧状の配列軌跡に沿って互いに隣接
する前記各発光素子が略等間隔となるように配置され、
前記指針は前記駆動軸の軸線方向に対し略直交する方向
に長手状に伸びる指示部とこの指示部の長手方向軸線に
対応する位置を中央部として前記指示部の後端側に形成
される第1の反射面とこの第1の反射面の両側方であっ
てこれとは互いに等間隔を有して前記指示部の後端側に
形成される第2の反射面及び第3の反射面とで構成され
各々が前記発光素子の配列軌跡に応じて前記発光素子の
照明光を前記指示部に向けて反射するように配置される
反射部とを備え、前記発光素子の配列軌跡に対応する前
記反射部の幅寸法は略等間隔にて各々隣接する任意の3
つの前記発光素子のうち中央に位置する1つの発光素子
の中心が前記第1の反射部の中央部に対向するとき両脇
に位置する他の2つの前記発光素子が前記第2,第3の
反射部に対向しないと共に前記任意の3つの発光素子の
うち中央に位置する前記発光素子が前記第1の反射部に
対向しないとき中央に位置する前記発光素子及びこれと
互いに隣接する何れか一方の前記発光素子が前記第2,
第3の反射部の双方に各々対向するように設定されてい
ることにより、必要最小限の発光素子で指針を明るく且
つムラなく照明でき、低コストで発光ムラを抑制し得る
指針照明装置を提供することができる。As described above in detail, the present invention relates to a pointer illuminating device for illuminating a translucent pointer which is driven around an axis by a driving shaft of an instrument main body with illumination light of a plurality of light emitting elements. The light-emitting elements are arranged behind the hands so that the light-emitting elements adjacent to each other are arranged at substantially equal intervals along a substantially concentric arc-shaped array locus about the axis of the drive shaft.
The pointer is an indicator that extends longitudinally in a direction substantially perpendicular to the axis direction of the drive shaft, and a second portion that is formed at a rear end side of the indicator with a position corresponding to the longitudinal axis of the indicator as a center. A first reflecting surface and a second reflecting surface and a third reflecting surface formed on both sides of the first reflecting surface and formed on the rear end side of the pointing portion at equal intervals from each other; Each comprising a reflecting portion arranged so as to reflect the illumination light of the light emitting element toward the indicator in accordance with the arrangement locus of the light emitting element, and corresponding to the arrangement locus of the light emitting element. The width of the reflecting portion is any three adjacent to each other at substantially equal intervals.
When the center of one light-emitting element located at the center of the two light-emitting elements faces the center of the first reflecting portion, the other two light-emitting elements located on both sides are the second and third light-emitting elements. The light emitting element which is not opposed to the reflecting part and which is located at the center of the arbitrary three light emitting elements when it is not opposed to the first reflecting part, and the light emitting element which is located at the center and any one adjacent to the light emitting element The light emitting element is the second light emitting element.
A pointer illuminating device capable of illuminating a pointer brightly and uniformly with a minimum necessary light-emitting element by being set so as to be opposed to both of the third reflection portions, and capable of suppressing light-emitting unevenness at low cost. can do.
【図1】本発明の実施例に係わる指針照明装置の分解斜
視図。FIG. 1 is an exploded perspective view of a pointer lighting device according to an embodiment of the present invention.
【図2】図1の断面図。FIG. 2 is a sectional view of FIG.
【図3】指針と発光素子との位置関係を示す正面図。FIG. 3 is a front view showing a positional relationship between a pointer and a light emitting element.
【図4】(a)〜(g)は、指針の反射部と発光素子と
の位置関係を説明する説明図。FIGS. 4A to 4G are explanatory diagrams illustrating a positional relationship between a reflecting portion of a pointer and a light emitting element.
【図5】(a)〜(g)は、指針の反射部と発光素子と
の位置関係を説明する説明図。FIGS. 5A to 5G are explanatory diagrams illustrating a positional relationship between a reflecting portion of a pointer and a light emitting element.
1 駆動軸 2 計器本体 3 回路基板 31 貫通孔 4 連結部材 41 ボス部 42 載置部 43 開口部 5 指針 51 回転中心基部 52 指示部 53 第1の反射面 54 第2の反射面 55 第3の反射面 56 反射部 6 指針キャップ 7(7a〜7f) 発光素子 8 計器文字板 C 中央部 L 長手方向軸線 P 軸心 W 幅寸法 X 中心 REFERENCE SIGNS LIST 1 drive shaft 2 instrument main body 3 circuit board 31 through hole 4 connecting member 41 boss part 42 mounting part 43 opening part 5 pointer 51 rotation center base 52 indicating part 53 first reflecting surface 54 second reflecting surface 55 third Reflecting surface 56 Reflecting part 6 Pointer cap 7 (7a to 7f) Light emitting element 8 Instrument dial C Central part L Longitudinal axis P Axis W Width X Center
Claims (1)
透光性の指針を複数の発光素子の照明光にて光輝させる
指針照明装置であって、前記発光素子は前記指針の背後
に前記駆動軸の軸心を中心とする略同心弧状の配列軌跡
に沿って互いに隣接する前記各発光素子が略等間隔とな
るように配置され、前記指針は前記駆動軸の軸線方向に
対し略直交する方向に長手状に伸びる指示部とこの指示
部の長手方向軸線に対応する位置を中央部として前記指
示部の後端側に形成される第1の反射面とこの第1の反
射面の両側方であってこれとは互いに等間隔を有して前
記指示部の後端側に形成される第2の反射面及び第3の
反射面とで構成され各々が前記発光素子の配列軌跡に応
じて前記発光素子の照明光を前記指示部に向けて反射す
るように配置される反射部とを備え、前記発光素子の配
列軌跡に対応する前記反射部の幅寸法は略等間隔にて各
々隣接する任意の3つの前記発光素子のうち中央に位置
する1つの発光素子の中心が前記第1の反射部の中央部
に対向するとき両脇に位置する他の2つの前記発光素子
が前記第2,第3の反射部に対向しないと共に前記任意
の3つの発光素子のうち中央に位置する前記発光素子が
前記第1の反射部に対向しないとき中央に位置する前記
発光素子及びこれと互いに隣接する何れか一方の前記発
光素子が前記第2,第3の反射部の双方に各々対向する
ように設定されていることを特徴とする指針照明装置。1. A pointer illuminating device for illuminating a translucent pointer driven around an axis by a driving shaft of an instrument body with illumination light of a plurality of light emitting elements, wherein the light emitting element is provided behind the pointer. The light-emitting elements adjacent to each other are arranged at substantially equal intervals along a substantially concentric arc-shaped array locus about the axis of the drive shaft, and the hands are substantially orthogonal to the axial direction of the drive shaft. And a first reflecting surface formed on a rear end side of the indicating portion with a position corresponding to a longitudinal axis of the indicating portion as a center portion, and both sides of the first reflecting surface. And a second reflecting surface and a third reflecting surface formed on the rear end side of the indicating portion at equal intervals from each other, each of which corresponds to the arrangement trajectory of the light emitting element. Arranged so as to reflect the illumination light of the light emitting element toward the indicator. A reflecting portion, and a width dimension of the reflecting portion corresponding to the arrangement trajectory of the light emitting element is such that the center of one light emitting element located at the center of any three light emitting elements adjacent to each other at substantially equal intervals is When facing the center of the first reflector, the other two light-emitting elements located on both sides do not face the second and third reflectors, and are located at the center of the arbitrary three light-emitting elements. When the light emitting element located is not opposed to the first reflecting section, the light emitting element located at the center and any one of the light emitting elements adjacent to the light emitting element are provided on both the second and third reflecting sections, respectively. An indicator lighting device characterized by being set to face each other.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28968596A JPH10132618A (en) | 1996-10-31 | 1996-10-31 | Pointer illuminating device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28968596A JPH10132618A (en) | 1996-10-31 | 1996-10-31 | Pointer illuminating device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10132618A true JPH10132618A (en) | 1998-05-22 |
Family
ID=17746427
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28968596A Pending JPH10132618A (en) | 1996-10-31 | 1996-10-31 | Pointer illuminating device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10132618A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007046958A (en) * | 2005-08-08 | 2007-02-22 | Yazaki Corp | Measuring instrument, and dial therefor |
JP2007285850A (en) * | 2006-04-17 | 2007-11-01 | Yazaki Corp | Pointer of instrument |
JP2008020209A (en) * | 2006-07-10 | 2008-01-31 | Denso Corp | Light emitting indicator for meter and meter with the same |
JP2009092462A (en) * | 2007-10-05 | 2009-04-30 | Yazaki Corp | Light-emitting pointer instrument |
JP2011033342A (en) * | 2009-07-29 | 2011-02-17 | Honda Motor Co Ltd | Meter structure for motorcycle |
-
1996
- 1996-10-31 JP JP28968596A patent/JPH10132618A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007046958A (en) * | 2005-08-08 | 2007-02-22 | Yazaki Corp | Measuring instrument, and dial therefor |
JP2007285850A (en) * | 2006-04-17 | 2007-11-01 | Yazaki Corp | Pointer of instrument |
JP2008020209A (en) * | 2006-07-10 | 2008-01-31 | Denso Corp | Light emitting indicator for meter and meter with the same |
JP4665853B2 (en) * | 2006-07-10 | 2011-04-06 | 株式会社デンソー | Emission indicator for instrument and instrument equipped with the same |
JP2009092462A (en) * | 2007-10-05 | 2009-04-30 | Yazaki Corp | Light-emitting pointer instrument |
JP2011033342A (en) * | 2009-07-29 | 2011-02-17 | Honda Motor Co Ltd | Meter structure for motorcycle |
CN102649401A (en) * | 2009-07-29 | 2012-08-29 | 本田技研工业株式会社 | Meter structure for motorcycle |
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