JP6225376B2 - Pointer-type instrument - Google Patents

Pointer-type instrument Download PDF

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JP6225376B2
JP6225376B2 JP2013178762A JP2013178762A JP6225376B2 JP 6225376 B2 JP6225376 B2 JP 6225376B2 JP 2013178762 A JP2013178762 A JP 2013178762A JP 2013178762 A JP2013178762 A JP 2013178762A JP 6225376 B2 JP6225376 B2 JP 6225376B2
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pointer
light source
light
drive shaft
circuit board
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JP2015049054A (en
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佐和子 小林
佐和子 小林
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Description

本発明は、光源から出射された光で指針を照明する指針式計器に関するものである。   The present invention relates to a pointer-type instrument that illuminates a pointer with light emitted from a light source.

従来、表示板上で回動する指針を光透過性の部材から形成し、表示板の背後に光源を配置し、この光源からの照明光を表示板の貫通孔を通じて指針に供給し、指針自体を光輝させる指針式計器が知られている。また、このような指針式計器は、貫通孔に遮光カラーを配置することによって、光源の光が表示板上に漏れることや指針内部に入射する光を調整するものである。   Conventionally, a pointer that rotates on a display board is formed from a light-transmitting member, a light source is disposed behind the display board, and illumination light from the light source is supplied to the pointer through a through-hole of the display board. There is known a pointer-type instrument that shines. In addition, such a pointer-type meter adjusts the light incident on the inside of the pointer or the light from the light source leaks onto the display plate by arranging a light-shielding collar in the through hole.

特開２０１３−４４６２１号公報JP 2013-44621 A

しかしながら、特許文献１に係る指針式計器の構成では、光源が駆動軸に近づくように配置した場合、遮光カラーの隙間から貫通孔を通過して指針基部内に入射する輝度が高すぎるため、指針の所望しない箇所が光り過ぎてしまうという問題点があった。   However, in the configuration of the pointer-type meter according to Patent Document 1, when the light source is arranged so as to approach the drive shaft, the luminance that enters the pointer base through the through hole from the gap of the light shielding collar is too high. There is a problem that an undesired portion of the light is too bright.

本発明は、上記実状に鑑みてなされたものであり、指針に入射する光の量を調節することによって、指針の輝度ムラを防ぐことが可能な指針式計器を提供することを特徴とする。   The present invention has been made in view of the above circumstances, and is characterized by providing a pointer-type instrument capable of preventing brightness unevenness of the pointer by adjusting the amount of light incident on the pointer.

本発明に係る指針式計器は、光源が配置された回路基板と、前記回路基板の裏面側に装着され前記回路基板を貫通する駆動軸を有する駆動本体と、指針本体と前記駆動軸に装着される基部とを備え、前記駆動軸の回転によって回転する指針と、指標部と、前記指針の裏面側に配置され前記駆動軸に対応した貫通孔が形成された表示板と、を備えた指針式計器において、前記光源からの光は前記基部に形成された反射部によって前記指針本体の前方及び後方に導光され、前記光源は前記駆動軸の近傍における前記指標部側の前記回路基板上に配置され、前記貫通孔は、前記光源側の上の部分は略円弧形状であり、前記略円弧形状の前記駆動軸と対向した部分が非円弧形状である。
A pointer-type instrument according to the present invention includes a circuit board on which a light source is disposed, a drive body having a drive shaft that is mounted on the back side of the circuit board and penetrates the circuit board, and a pointer body and the drive shaft. A pointer that is rotated by rotation of the drive shaft, an indicator portion, and a display plate that is disposed on the back side of the pointer and has a through hole corresponding to the drive shaft. in the instrument, the light from the light source is guided to the front and rear of the pointer body by the reflecting portion formed in the base, the light source on the circuit board of the indicator portion in the vicinity of the front Stories drive shaft The through hole has a substantially arc-shaped portion on the light source side, and a portion of the substantially arc-shaped portion facing the drive shaft has a non-arc shape.

本発明によれば、指針に入射する光の量を調節することによって、指針の輝度ムラを防ぐことが可能な指針式計器を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the pointer type meter which can prevent the brightness | luminance nonuniformity of a pointer can be provided by adjusting the quantity of the light which injects into a pointer.

本発明の第１実施形態に係る指針式計器の正面図。The front view of the pointer type meter which concerns on 1st Embodiment of this invention. 図１に示す指針式計器の断面図。Sectional drawing of the pointer type instrument shown in FIG. 図１に示す表示板の正面図。The front view of the display board shown in FIG.

本発明の一実施形態に係る指針式計器を、図面を参照して説明する。   A pointer type instrument according to an embodiment of the present invention will be described with reference to the drawings.

指針式計器は、指針１と、表示板２と、光源３と、駆動本体４と、回路基板５と、中ケース６と、裏カバー７と、前面カバー８とから主に構成されている。   The pointer-type instrument mainly includes a pointer 1, a display board 2, a light source 3, a drive body 4, a circuit board 5, a middle case 6, a back cover 7, and a front cover 8.

指針１は、ポリカーボネートやアクリル合成樹脂からなり、裏面にホットスタンプ層が形成された透光性の指針本体１０と、指針本体１０と一体成形された基部１１と、この指針本体１０の回動中心領域の観察者側及びその周囲を覆って背後が開口する、黒色系の遮光性合成樹脂からなる遮光性部材であるキャップ形の遮光性カバー１２とからなる。基部１１には、光源３の光を基部内に入光させる受光部１１ａが形成されている。 Pointer 1 is made of polycarbonate or acrylic synthetic resin, a pointer body 10 of light-transmitting hot stamp layer is formed on the rear surface, a base portion 11 integrally formed with the pointer body 10, the center of rotation of the pointer body 10 It comprises a cap-shaped light-shielding cover 12 that is a light-shielding member made of a black-colored light-shielding synthetic resin, covering the observer side of the region and the periphery thereof and opening at the back. The base 11 is formed with a light receiving portion 11a that allows light from the light source 3 to enter the base.

表示板２は、例えば、透光性合成樹脂板にスクリーン印刷を施してなるもので、光源３によって透過照明される指標部２１と、後述する駆動軸４１が貫通される貫通孔２２とを有している。表示板２は中ケース６によって回路基板５上に支持されている。 The display plate 2 is formed, for example, by screen printing on a translucent synthetic resin plate, and has an indicator portion 21 that is transmitted and illuminated by the light source 3 and a through hole 22 through which a drive shaft 41 to be described later passes. doing. The display board 2 is supported on the circuit board 5 by the middle case 6.

貫通孔２２は、光源３が実装された位置の真上にある部分は半円（円弧形状）であって、この円弧形状の駆動軸４１中心点と対向した部分は非円弧形状（Ｖ字状など）となっている。 The through hole 22 is a semicircle (arc-shaped) at a position directly above the position where the light source 3 is mounted, and a portion facing the center point of the arc-shaped drive shaft 41 is a non-arc-shaped (V-shaped). Etc.).

光源３は、回路基板５上（観察者側）であって指針１の回動領域に実装される、例えばトップビュータイプの発光ダイオードであり白色に発光する。本実施形態においては、同一の光源３によって指標部２１と指針１とが照明される。 The light source 3 is, for example, a top-view type light emitting diode that is mounted on the circuit board 5 (observer side) and in the rotation region of the pointer 1 and emits white light. In the present embodiment, the indicator portion 21 and the pointer 1 are illuminated by the same light source 3 .

駆動本体４は、例えばステッピングモーターを適用でき、駆動軸４１を有し、この駆動軸４１が指針１の基部１１と連結される。また駆動本体４は、その本体部が回路基板５の背面側に位置し、駆動軸４１が回路基板５を貫通して延びている。 For example, a stepping motor can be applied to the drive main body 4, and a drive shaft 41 is connected to the base 11 of the pointer 1. The driving body 4 is positioned the main body portion on the back side of the circuit board 5, extending Biteiru drive shaft 41 penetrates the circuit board 5.

回路基板５は、例えばガラスエポシキ樹脂からなる周知の硬質回路基板であり、光源３と駆動本体４に電力供給を行う図示しない回路パターンを有する。   The circuit board 5 is a well-known hard circuit board made of, for example, glass epoxy resin, and has a circuit pattern (not shown) that supplies power to the light source 3 and the drive body 4.

中ケース６は、例えば白色の合成樹脂からなり、光源３の光を指標部２１方向に反射させる第１の反射部６１と、指針１の基部１１の方向に反射させる第２の反射部６２とを有し、回路基板５の観察者側に配置されている。 The middle case 6 is made of, for example, white synthetic resin, and includes a first reflecting portion 61 that reflects light from the light source 3 in the direction of the indicator portion 21, and a second reflecting portion 62 that reflects in the direction of the base portion 11 of the pointer 1. And is arranged on the observer side of the circuit board 5 .

裏カバー７は、例えばポリプロピレン等、無着色の合成樹脂からなり、回路基板５の裏側（観察者側とは反対側）を覆うように配置される。   The back cover 7 is made of an uncolored synthetic resin such as polypropylene, for example, and is disposed so as to cover the back side (the side opposite to the observer side) of the circuit board 5.

前面カバー８は、例えば、透過部材からなり、表示板２及び指針１を覆っている。前面カバー８の中央部分には、開口窓が設けられ、表示板２が透視可能なように、前面ガラス８１が嵌め込まれている。 The front cover 8 is made of a transmissive member, for example, and covers the display board 2 and the pointer 1. An opening window is provided in the central portion of the front cover 8, and a front glass 81 is fitted so that the display panel 2 can be seen through.

光源３の光は、第２の反射部６２によって形成される空間Ｓ内で乱反射し、基部１１の受光部１１ａから指針本体１０に入光する。指針本体１０に入光した光は、基部１１に形成された第３の反射部１１ｂによってさらに乱反射し、指針本体１０の前方及び後方に導光される。 The light from the light source 3 is diffusely reflected in the space S formed by the second reflecting portion 62 and enters the pointer main body 10 from the light receiving portion 11 a of the base portion 11. The light incident on the pointer main body 10 is further diffusely reflected by the third reflecting portion 11 b formed on the base 11 and guided to the front and rear of the pointer main body 10 .

本発明によれば、光源３が配置された回路基板５と、回路基板５の裏面側に装着され回路基板５を貫通する駆動軸４１を有する駆動本体４と、指針本体１０と駆動軸４１に装着される基部１１とを備え、駆動軸４１の回転によって回転する指針１と、指標部２１と、指針１の裏面側に配置され駆動軸４１に対応した貫通孔２２が形成された表示板２と、を備えた指針式計器において光源３からの光は基部１１に形成された反射部１１ｂによって指針本体１０の前方及び後方に導光され、光源３は駆動軸４１の近傍における指標部２１側の回路基板５上に配置され、貫通孔２２は、光源３側の上の部分は略円弧形状であり、略円弧形状の駆動軸４１と対向した部分が非円弧形状であり、駆動軸４１を挟んで光源３と対向した貫通孔２２箇所を非円弧形状としたことによって、光源３から直接受光部１１ａに入射する光や、第２の反射部６２によって乱反射される光の入射を抑えられるため、指針本体１０の先端に向かう輝度は落とさずに、指針本体１０の輝度ムラを調整することが可能となる。 According to the present invention, the circuit board 5 on which the light source 3 is disposed, the drive body 4 having the drive shaft 41 mounted on the back side of the circuit board 5 and penetrating the circuit board 5, the pointer body 10 and the drive shaft 41 A display board 2 that includes a base 11 to be mounted and rotates with the rotation of the drive shaft 41, an indicator portion 21, and a through hole 22 that is disposed on the back side of the pointer 1 and that corresponds to the drive shaft 41. When light from the light source 3 in the pointer-type meters with is guided to the front and rear of the pointer body 10 by the reflective portion 11b formed in the base 11, the index portion 21 in the vicinity of the light source 3 is drive shaft 41 The through hole 22 is disposed on the circuit board 5 on the side, and the upper portion on the light source 3 side is substantially arc-shaped, and the portion facing the substantially arc-shaped drive shaft 41 is non-arc-shaped. The 22 through-holes facing the light source 3 across By adopting the arc shape, it is possible to suppress the incidence of light that is directly incident on the light receiving unit 11a from the light source 3 or light that is irregularly reflected by the second reflecting unit 62, so that the luminance toward the tip of the pointer body 10 is not reduced. Therefore, it is possible to adjust the luminance unevenness of the pointer main body 10.

本実施形態の場合、Ｖ字状の非円弧形状の例を説明したが、これに限定されるものではなく、指針本体１０の輝度ムラに応じて貫通孔２２の形状を変更することができ、例えば四角形や台形などの多角形状であってもよい。   In the case of the present embodiment, the example of the V-shaped non-arc shape has been described, but the present invention is not limited to this, and the shape of the through hole 22 can be changed according to the luminance unevenness of the pointer body 10. For example, it may be a polygonal shape such as a square or a trapezoid.

１ 指針
２ 表示板
３ 光源
４ 駆動本体
５ 回路基板
６ 中ケース
７ 裏カバー
８ 前面カバー
１０ 指針本体
１１ 基部
１１ａ 受光部
１１ｂ 第３の反射部
１２ 遮光性カバー
２１ 指標部
２２ 貫通孔
４１ 駆動軸
８１ 前面ガラス
Ｓ 空間 DESCRIPTION OF SYMBOLS 1 Pointer 2 Display board 3 Light source 4 Drive main body 5 Circuit board 6 Middle case 7 Back cover 8 Front cover 10 Pointer main body 11 Base part 11a Light-receiving part 11b 3rd reflection part 12 Light-shielding cover 21 Index part 22 Through-hole 41 Drive shaft 81 Front glass S space

Claims (1)

光源が配置された回路基板と、前記回路基板の裏面側に装着され前記回路基板を貫通する駆動軸を有する駆動本体と、指針本体と前記駆動軸に装着される基部とを備え、前記駆動軸の回転によって回転する指針と、指標部と、前記指針の裏面側に配置され前記駆動軸に対応した貫通孔が形成された表示板と、を備えた指針式計器において、前記光源からの光は前記基部に形成された反射部によって前記指針本体の前方及び後方に導光され、前記光源は前記駆動軸の近傍における前記指標部側の前記回路基板上に配置され、前記貫通孔は、前記光源側の上の部分は略円弧形状であり、前記略円弧形状の前記駆動軸と対向した部分が非円弧形状であることを特徴とする指針式計器。
A circuit board on which a light source is disposed; a drive main body having a drive shaft that is attached to the back side of the circuit board and penetrates the circuit board; a pointer main body; and a base that is attached to the drive shaft; In a pointer-type meter comprising a pointer that rotates by rotation of the pointer, an indicator portion, and a display plate that is disposed on the back side of the pointer and that has a through hole corresponding to the drive shaft, the light from the light source is is guided to the front and rear of the pointer body by the reflecting portion formed in the base, the light source is disposed on the circuit board of the indicator portion in the vicinity of the front SL drive shaft, the through hole, the The pointer-type instrument characterized in that the upper part on the light source side has a substantially arc shape, and the part of the substantially arc shape facing the drive shaft has a non-arc shape.
JP2013178762A 2013-08-30 2013-08-30 Pointer-type instrument Active JP6225376B2 (en)

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10246653A (en) * 1997-03-05 1998-09-14 Yazaki Corp Lighting device for measuring instrument
JP2012220290A (en) * 2011-04-07 2012-11-12 Nippon Seiki Co Ltd Pointer type measuring apparatus

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