JP4904538B2

JP4904538B2 - Instrument device

Info

Publication number: JP4904538B2
Application number: JP2006189923A
Authority: JP
Inventors: 秀樹五十嵐
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 2006-07-11
Filing date: 2006-07-11
Publication date: 2012-03-28
Anticipated expiration: 2026-07-11
Also published as: JP2008020216A

Description

本発明は、例えば自動車を代表とする各種車両に搭載される計器装置に関する。 The present invention relates to an instrument device mounted on various vehicles such as automobiles.

従来、この種の計器装置にあっては、例えば下記特許文献１に記載されているものが知られている。この特許文献１に記載の計器装置は、指針によって指示される着色透過層からなる指標部と前記指標部の背景を形成する黒色の地色層とが無色透明材料からなる平板状の基板の前面に施された指標板と、前記指標板の背面に沿うように前記基部と略平行に設けられる平板状の導光部と前記導光部の外側端部から下方に向けて垂下する凸形状からなる受光部とを有し、光源からの光を前記受光部で受けて、前記指標板を背後からバックライト照明する無色透明材料からなる導光部材とを備え、前記導光部材の前記導光部が前記指標板（前記基部）の背面に密着するように前記指標板と前記導光部材とが一体的に形成されている構成である。一方、下記特許文献２には、周縁側の開口領域が広く、中心側に向かうに従って前記開口領域が狭くなるような略すり鉢形状を有し、略すり鉢状傾斜部の外縁（前記周縁側）近傍に指標部の施された車両用計器の指標板が開示されている。
特開２００１−３４３２６０号公報実開平５−２３０４６号公報 Conventionally, as this type of instrument device, for example, the one described in Patent Document 1 below is known. The instrument device described in Patent Document 1 is a front surface of a flat substrate in which an indicator portion made of a colored transmission layer indicated by a pointer and a black ground color layer forming a background of the indicator portion are made of a colorless transparent material. An indicator plate applied to the plate, a flat light guide portion provided substantially parallel to the base portion along the back surface of the indicator plate, and a convex shape that hangs downward from an outer end portion of the light guide portion. And a light guide member made of a colorless and transparent material that receives light from a light source at the light receiver and backlight-illuminates the indicator plate from behind, and the light guide of the light guide member. The indicator plate and the light guide member are integrally formed so that the portion is in close contact with the back surface of the indicator plate (the base). On the other hand, the following Patent Document 2 has a substantially mortar shape in which the opening region on the peripheral side is wide and the opening region becomes narrower toward the center side, and is near the outer edge (the peripheral side) of the substantially mortar-shaped inclined portion. Discloses an indicator plate of a vehicle instrument provided with an indicator portion.
JP 2001-343260 A Japanese Utility Model Publication No. 5-23046

そこで、特許文献２に記載の略すり鉢形状からなる指標板を、特許文献１に記載の計器装置の指標板に適用した場合、指標板の背面に密着するように一体形成される前記導光部材の前記導光部も略すり鉢形状を有するように構成されることになる。このため、前記指標板並びに前記導光部が、ともに略すり鉢形状に形成されると、前記指標板の背面に一体形成された前記導光部を用いて前記指標板の外縁近傍に位置する前記指標部（前記着色透過層）をバックライト照明するには、前記導光部から下方に垂下する前記受光部を特許文献１に記載の計器装置ように外側端部ではなく、内側端部（中心側開口領域に対応する端部）に複数設け、その背後に各々光源を配置する必要がある。 Therefore, when the indicator plate having a substantially mortar shape described in Patent Literature 2 is applied to the indicator plate of the instrument device described in Patent Literature 1, the light guide member is integrally formed so as to be in close contact with the back surface of the indicator plate. The light guide portion is also configured to have a substantially mortar shape. For this reason, when the indicator plate and the light guide part are both formed in a substantially mortar shape, the light guide part integrally formed on the back surface of the indicator plate is used in the vicinity of the outer edge of the indicator plate. In order to backlight illuminate the indicator portion (the colored transmission layer), the light receiving portion that hangs downward from the light guide portion is not an outer end portion but an inner end portion (center) as in the instrument device described in Patent Document 1. It is necessary to provide a plurality of light sources at the back of each of the plurality of light sources at the end corresponding to the side opening region.

従って、前記指標板並びにこれに密着している前記導光部をともに略すり鉢形状とした場合、光源からの光は、前記導光部の内側端部（中心側開口領域に対応する端部）に位置する受光部に供給され、この受光部内に供給された光が略すり鉢状傾斜部（前記導光部）の外縁に向けて放射状に反射導光されることで、前記指標部がバックライト照明されることになる。 Therefore, when both the indicator plate and the light guide part in close contact with the indicator plate are formed in a substantially mortar shape, the light from the light source is the inner end part of the light guide part (the end part corresponding to the center side opening region). The light supplied to the light receiving portion located in the light receiving portion is reflected and guided radially toward the outer edge of the substantially mortar-shaped inclined portion (the light guide portion), whereby the indicator portion is backlit. Will be illuminated.

ところで、前記導光部が略すり鉢形状であれば、前記導光部を平板状とした場合に比べて前記受光部から前記導光部外縁に至る導光経路が当然のことながら長くなるため、前記指標板を照明するには前記略すり鉢状傾斜部（前記導光部）の外縁に到達するまでの間に光のロスを最小限に抑える必要がある。しかしながら、前記導光部が、前記指標板の背面に密着し、且つ前記指標部（前記着色透過層）及び黒色の前記地色層が前記基板の前面に形成されている場合、前記導光部及び前記基板を透過する透過光の一部が、黒色の前記地色層にあたって減衰し、これにより前記略すり鉢状傾斜部の外縁に到達する光量が不足するため、照明効率が低下してしまうという問題があり、更なる改良の余地が残されていた。
そこで本発明は、前述の課題に対して対処するため、一体形成される指標板と導光部材の形状が特殊な場合であっても、照明効率の低下を抑制することが可能な計器装置の提供を目的とするものである。 By the way, if the light guide part is substantially mortar-shaped, the light guide path from the light receiving part to the outer edge of the light guide part is naturally longer than when the light guide part has a flat plate shape. In order to illuminate the indicator plate, it is necessary to minimize the loss of light before reaching the outer edge of the substantially mortar-shaped inclined portion (the light guide portion). However, when the light guide portion is in close contact with the back surface of the indicator plate, and the indicator portion (the colored transmission layer) and the black ground color layer are formed on the front surface of the substrate, the light guide portion And a part of the transmitted light that passes through the substrate attenuates in the black ground color layer, so that the amount of light reaching the outer edge of the substantially mortar-shaped inclined portion is insufficient, so that the illumination efficiency is reduced. There was a problem and there was room for further improvement.
Therefore, in order to address the above-described problems, the present invention provides an instrument device capable of suppressing a decrease in illumination efficiency even when the shape of the integrally formed indicator plate and the light guide member is special. It is for the purpose of provision.

本発明は、駆動装置の回転軸にて回転駆動される指針と、前記指針によって指示される指標部と前記指標部の背景をなす地色部とが施された立体形状からなる指標板と、前記指標板の背後に配設され、光源からの光を受光部で受けて、前記指標板を背後から照明する導光部材とを備え、前記指標板は、前記回転軸が貫通する貫通孔を有する平板部と、前記平板部を取り巻くように前記平板部の前方側に延びる傾斜部とを有するような前記立体形状となっており、前記傾斜部には前記指標部が形成され、前記導光部材は、前記平板部の背面に沿い配設される第１の導光部と、前記傾斜部の背面に沿い配設される第２の導光部とを有し、前記指標板と前記導光部材とは一体形成されているとともに、前記指標板には、前記地色部の背面側における少なくとも所要部に前記地色部に対して光反射率の高い反射部が形成されてなり、前記回転軸の近傍に配置される前記第１の導光部には、複数個の前記光源とそれぞれ対向するように複数個の前記受光部が垂下形成されてなることを特徴とする。
The present invention provides a pointer plate having a three-dimensional shape provided with a pointer that is rotationally driven by a rotation shaft of a driving device, an index portion that is indicated by the pointer, and a ground color portion that forms a background of the indicator portion; A light guide member that is disposed behind the indicator plate and receives light from a light source at a light receiving unit and illuminates the indicator plate from behind; the indicator plate has a through-hole through which the rotating shaft passes. The solid plate portion and the inclined portion extending to the front side of the flat plate portion so as to surround the flat plate portion, and the indicator portion is formed on the inclined portion, and the light guide The member has a first light guide portion disposed along the back surface of the flat plate portion, and a second light guide portion disposed along the back surface of the inclined portion, and the indicator plate and the light guide portion. The light member is integrally formed, and the indicator plate is provided on the back side of the ground color portion. Ri Na and highly reflective portion of the light reflection factor with respect to the background color portion is formed on predetermined portions even without, wherein the first light guide portion, a plurality of the light source disposed in the vicinity of the rotary shaft And a plurality of the light receiving portions are formed so as to face each other.

また本発明は、前記反射部が、鏡面層からなることを特徴とする。 In the invention, it is preferable that the reflecting portion is a mirror surface layer.

また本発明は、駆動装置の回転軸にて回転駆動される指針と、前記指針によって指示される指標部が施された立体形状からなる指標板と、前記指標板の背後に配設され、光源からの光を受光部で受けて、前記指標板を背後から照明する導光部材とを備え、前記指標板は、前記回転軸が貫通する貫通孔を有する平板部と、前記平板部を取り巻くように前記平板部の前方側に延びる傾斜部とを有するような前記立体形状となっており、前記傾斜部には前記指標部が形成され、前記導光部材は、前記平板部の背面に沿い配設される第１の導光部と、前記傾斜部の背面に沿い配設される第２の導光部とを有し、前記指標板と前記導光部材とは一体形成されているとともに、前記導光部材には、前記受光部で受けた光が前記指標部の施されている所定範囲内に進むように、光の進行方向を規制する規制手段が設けられ、前記回転軸の近傍に配置される前記第１の導光部には、複数個の前記光源とそれぞれ対向するように複数個の前記受光部が垂下形成されてなることを特徴とする。
Further, the present invention provides a pointer that is rotationally driven by a rotation shaft of a driving device, an indicator plate having a three-dimensional shape provided with an indicator portion instructed by the indicator, and a light source disposed behind the indicator plate. A light guide member that receives light from the light receiving portion and illuminates the indicator plate from behind, the indicator plate surrounding the flat plate portion with a flat plate portion having a through hole through which the rotation shaft passes. And an inclined portion extending to the front side of the flat plate portion, the indicator portion is formed on the inclined portion, and the light guide member is disposed along the back surface of the flat plate portion. A first light guide portion provided and a second light guide portion disposed along the back of the inclined portion, and the indicator plate and the light guide member are integrally formed, On the light guide member, the light received by the light receiving portion is a predetermined range to which the indicator portion is applied. As advances within, regulating means for regulating a traveling direction of light is provided, wherein the first light guide portion, a plurality such that each a plurality of the light source facing which is disposed in the vicinity of the rotary shaft The number of the light receiving portions is formed in a hanging manner.

また本発明は、前記規制手段は、前記指針の回動範囲と前記指針の回動範囲外との境界に形成された溝部からなることを特徴とする。 In the invention, it is preferable that the restricting means includes a groove portion formed at a boundary between the turning range of the pointer and the outside of the turning range of the pointer.

また本発明は、前記指標板と前記導光部材とは、インサート成形により一体形成されてなることを特徴とする。 Further, the invention is characterized in that the indicator plate and the light guide member are integrally formed by insert molding.

本発明によれば、初期の目的を達成でき、一体形成される指標板と導光部材の形状が特殊な場合であっても、照明効率の低下を抑制することが可能な計器装置を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where the shape of the indicator plate and light guide member which are formed integrally can be achieved, the instrument apparatus which can suppress decline in illumination efficiency can be provided. .

（第１実施形態）図１から図４は、本発明の第１実施形態を示すもので、以下、これらに基づいて本発明の実施形態を例えば車両に搭載される指針式速度計に適用した場合について説明する。なお、図１は本発明の第１実施形態による計器装置の正面図、図２は図１のＡ−Ａ断面図、図３は図２の一部を拡大して示す要部断面図、図４は同実施形態による導光部材の正面図である。 (First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. Based on these, the embodiment of the present invention is applied to a pointer-type speedometer mounted on a vehicle, for example. The case will be described. 1 is a front view of the instrument device according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1, and FIG. 4 is a front view of the light guide member according to the embodiment.

図１，図２において、本実施形態による計器装置は、回路基板１と、この回路基板１に導通装着され回転軸２が前方に延びる駆動装置３と、回転軸２にて回転駆動される指針４と、この指針４によって指示される後述する指標部を有する指標板５と、この指標板５の背後に密着するように配設される後述する導光部を有する導光部材６と、指針４を照明する指針用光源７と、導光部材６内に光を供給し、前記指標部を照明する光源（指標用光源）８と、回路基板１と指標板５との間に配置されるケース体９と、指標板５の後述する立壁部を包囲する見返し部材１０とから構成される。 1 and 2, the instrument device according to the present embodiment includes a circuit board 1, a driving device 3 that is conductively attached to the circuit board 1 and has a rotating shaft 2 extending forward, and a pointer that is rotationally driven by the rotating shaft 2. 4, an indicator plate 5 having an indicator portion, which will be described later, indicated by the pointer 4, a light guide member 6 having a light guide portion, which will be described later, disposed so as to be in close contact with the back of the indicator plate 5, and a pointer 4 is arranged between the circuit board 1 and the indicator plate 5, the pointer light source 7 that illuminates 4, the light source (index light source) 8 that supplies light into the light guide member 6 and illuminates the indicator portion. It is comprised from the case body 9 and the turning member 10 surrounding the standing wall part which the index board 5 mentions later.

回路基板１は、例えばガラスエポキシ系基材に配線パターン（図示せず）を施した硬質回路基板からなり、指針用光源７と、光源８と、駆動装置３の駆動・制御を行う駆動手段（図示せず）や抵抗、コンデンサ等の各種回路部品（図示せず）が前記配線パターンに導通接続されている。 The circuit board 1 is made of a hard circuit board in which, for example, a glass epoxy base material is provided with a wiring pattern (not shown), and driving means for driving and controlling the pointer light source 7, the light source 8, and the driving device 3. Various circuit components (not shown) such as a resistor, a capacitor and the like are electrically connected to the wiring pattern.

駆動装置３は、可動磁石式計器またはステッピングモータからなり、回転軸２が回路基板１を貫通するように、その主要部が回路基板１の背後に装着され、且つ半田付け等の適宜導通手段により前記配線パターンに電気接続される。 The driving device 3 is composed of a movable magnet-type instrument or a stepping motor, the main part of which is mounted behind the circuit board 1 so that the rotating shaft 2 penetrates the circuit board 1 and is appropriately connected by means such as soldering. Electrical connection is made to the wiring pattern.

指針４は、指標板５の前記指標部を指示する透光性合成樹脂からなる指示部４１と、この指示部４１の回転中心領域Ｒの外周を覆う遮光性合成樹脂からなる指針キャップ４２とを備え、指針４の回転中心領域Ｒには、背後に配置された指針用光源７から発せられる光を受光し、その光を指示部４１の先端側に反射導光する図示しない受光面が形成されている。 The pointer 4 includes an indicator 41 made of a light-transmitting synthetic resin that indicates the indicator portion of the indicator plate 5 and a pointer cap 42 made of a light-shielding synthetic resin that covers the outer periphery of the rotation center region R of the indicator 41. The rotation center region R of the pointer 4 is formed with a light receiving surface (not shown) that receives light emitted from the light source 7 for pointer disposed behind and reflects and guides the light to the distal end side of the indicator 41. ing.

なお、本実施形態の場合、指標板５における前記指標部の形成される面（指標板５の後述する傾斜部）は、後述するように略すり鉢状傾斜面に形成されていることから、指示部４１は、前記傾斜部と所定間隔を有するように、指標板５の略中心部から前記傾斜部の外縁に向けて線状に延び、前記指標部を指示しているものとする。 In the case of the present embodiment, the surface of the indicator plate 5 on which the indicator portion is formed (an inclined portion to be described later of the indicator plate 5) is formed in a substantially mortar-like inclined surface as will be described later. The part 41 extends linearly from the substantially central part of the indicator plate 5 toward the outer edge of the inclined part so as to have a predetermined distance from the inclined part, and indicates the indicator part.

指標板５は、車両の速度を表示するための速度表示部からなり、指針４の回転軌道に沿った円弧状の配列形状を有し、図３に示すように指示部４１の指示対象となる目盛５１ａ，数字５１ｂからなる指標部５１と、この指標部５１の背景をなす背景部（地色部）５２と、背景部５２に対応して形成される光反射率の高い鏡面層からなる反射部５３とを有している。 The indicator plate 5 is composed of a speed display unit for displaying the speed of the vehicle, has an arcuate array shape along the rotation trajectory of the pointer 4, and becomes an instruction target of the instruction unit 41 as shown in FIG. Reflection comprising an index part 51 composed of a scale 51a and a number 51b, a background part (ground color part) 52 forming the background of the index part 51, and a specular layer having a high light reflectance formed corresponding to the background part 52 Part 53.

また、指標部５１、背景部５２並びに反射部５３は、指標部５１が白色系の透光性インクにより、また背景部５２が黒色系の遮光性インクにより、それぞれ指標板５の母材となる薄板状の透光性基板５４の前面に印刷形成され、また鏡面層である反射部５３は、ミラーインクにより指標部５１の形成範囲を除く透光性基板５４の背面側に印刷形成される。 In addition, the index portion 51, the background portion 52, and the reflection portion 53 serve as a base material of the index plate 5 with the index portion 51 made of white light-transmitting ink and the background portion 52 made of black light-shielding ink, respectively. The reflection part 53 which is a mirror surface layer is printed and formed on the back side of the translucent substrate 54 excluding the formation range of the index part 51 by a mirror ink.

このとき、背景部５２は、後述する指標板５の平板部、傾斜部（指標部５１の非形成領域に対応する傾斜部箇所）、平坦部並びに立壁部に形成され、反射部５３は、前記平板部、前記傾斜部（指標部５１の非形成領域に対応する傾斜部箇所）並びに前記平坦部のみに形成されるものとする。なお、指標部５１、背景部５２並びに反射部５３の各印刷層は、スクリーン印刷等の手段を用いて印刷形成されている。５５は、回転軸２が貫通する略円形の貫通孔であり、この貫通孔５５は、指標板５の略中央部に開口形成されている。 At this time, the background portion 52 is formed on a flat plate portion, an inclined portion (an inclined portion corresponding to a non-formation region of the indicator portion 51), a flat portion, and a standing wall portion, which will be described later. It is formed only on the flat plate portion, the inclined portion (the inclined portion corresponding to the non-formation region of the indicator portion 51), and the flat portion. The print layers of the index part 51, the background part 52, and the reflection part 53 are formed by printing using means such as screen printing. 55 is a substantially circular through-hole through which the rotary shaft 2 passes, and this through-hole 55 is formed in an approximately central portion of the indicator plate 5.

また指標板５は、立体形状に形成されており、略中央部に回転軸２を貫通させるための貫通孔５５が形成された環状の平板部５６と、この平板部５６を取り巻くように前方側（図２中、上側）に傾斜して延び、すり鉢形状の傾斜面を構成する傾斜部５７と、この傾斜部５７から外周に向け平板部５６と略平行に延びる環状の平坦部５８と、この平坦部５８の周縁から下方に垂下する略筒状の立壁部５９とを有し、本実施形態では、指標部５１と背景部５２と反射部５３とを透光性基板５４に印刷形成した後、透光性基板５４を熱変形させる、所謂、絞り加工（絞り成形）により立体形状からなる指標板５が形成されている。 The indicator plate 5 is formed in a three-dimensional shape, and has an annular flat plate portion 56 in which a through hole 55 for penetrating the rotary shaft 2 is formed in a substantially central portion, and a front side so as to surround the flat plate portion 56. (In FIG. 2, the upper side) and an inclined portion 57 that forms a mortar-shaped inclined surface, an annular flat portion 58 that extends substantially parallel to the flat plate portion 56 from the inclined portion 57 toward the outer periphery, In this embodiment, after the index part 51, the background part 52, and the reflection part 53 are printed and formed on the translucent substrate 54, it has a substantially cylindrical standing wall part 59 that hangs downward from the periphery of the flat part 58. The indicator plate 5 having a three-dimensional shape is formed by so-called drawing (drawing) that thermally deforms the translucent substrate 54.

なお、指標板５の主要部を構成する傾斜部５７は、平板部５６に対し所定角度、本実施形態では略４５度前方に傾いており、この領域内の周縁側に指標部５１（目盛５１ａ，数字５１ｂ）が形成されている。また、貫通孔５５は、前記絞り加工後に打ち抜き加工により得られる。 The inclined portion 57 that constitutes the main portion of the indicator plate 5 is inclined at a predetermined angle with respect to the flat plate portion 56, approximately 45 degrees in the present embodiment, and the indicator portion 51 (scale 51a) on the peripheral side in this region. , 51b). The through hole 55 is obtained by punching after the drawing.

導光部材６は、透光性合成樹脂からなり、指標板５の平板部５６、傾斜部５７並びに平坦部５８の背面に沿うように配設される導光部６１と、ケース体９の後述する第１の円筒部の周囲に位置し、導光部６１の後述する第１の導光部から光源８側に垂下する受光部６２とを備えている。 The light guide member 6 is made of a translucent synthetic resin, and a light guide portion 61 disposed along the back surface of the flat plate portion 56, the inclined portion 57 and the flat portion 58 of the indicator plate 5, and the case body 9 to be described later. And a light receiving portion 62 that hangs down from a first light guide portion (described later) of the light guide portion 61 toward the light source 8.

導光部６１は、指標板５の平板部５６背面に沿い配設される円環板状の第１の導光部６３と、指標板５の傾斜部５７背面に沿い配設され、指標板５の傾斜部５７と同様に略すり鉢状傾斜面を構成する第２の導光部６４と、指標板５の平坦部５８背面に沿い配設され、第２の導光部６４から外周に向け第１の導光部６３と略平行に延びる円環板状の第３の導光部６５とを有している。そして、かかる略すり鉢形状からなる導光部６１の底部に受光部６２が連続形成されている。 The light guide 61 is disposed along the back surface of the first annular light guide 63 disposed along the back surface of the flat plate portion 56 of the indicator plate 5 and the back surface of the inclined portion 57 of the indicator plate 5. 5 is disposed along the back surface of the flat portion 58 of the indicator plate 5 and the second light guide portion 64 that constitutes a substantially mortar-like inclined surface in the same manner as the inclined portion 57 of the fifth portion, toward the outer periphery. It has the 1st light guide part 63 and the 3rd light guide part 65 of the annular | circular plate shape extended substantially parallel. And the light-receiving part 62 is continuously formed in the bottom part of the light guide part 61 which consists of this substantially mortar shape.

なお、第１の導光部６３の略中央部には、指標板５の貫通孔５５に対応する略円形の貫通部６６が開口形成されており、かかる貫通部６６には、ケース体９の前記第１の円筒部や回転軸２が貫通している。また、略すり鉢状傾斜面からなる第２の導光部６４は、円環板状からなる第１の導光部６３を取り巻くように前方側（図２中、上側）に傾斜して延び、第１の導光部６３に対し所定角度、本実施形態では略４５度前方に傾いている。 In addition, a substantially circular through portion 66 corresponding to the through hole 55 of the indicator plate 5 is formed in the substantially central portion of the first light guide portion 63, and the through body 66 has the case body 9. The said 1st cylindrical part and the rotating shaft 2 have penetrated. Further, the second light guide part 64 made of a substantially mortar-like inclined surface extends inclining forward (upward in FIG. 2) so as to surround the first light guide part 63 made of an annular plate shape, The first light guide part 63 is inclined forward by a predetermined angle, in this embodiment, approximately 45 degrees.

受光部６２は、本実施形態の場合、第１の導光部６３背面から突出形成された略円柱状垂下部からなる第１の受光部６２ａ，第２の受光部６２ｂ，第３の受光部６２ｃ，第４の受光部６２ｄとを有し、これら４個の各受光部６２ａ，６２ｂ，６２ｃ，６２ｄの各底部が光源８の後述する第１，第２，第３，第４の光源の発光面とそれぞれ対向する位置関係となっている（図４参照）。 In the case of the present embodiment, the light receiving unit 62 includes a first light receiving unit 62a, a second light receiving unit 62b, and a third light receiving unit that are substantially cylindrical hanging portions protruding from the back surface of the first light guiding unit 63. 62c and a fourth light receiving portion 62d, and the bottom portions of the four light receiving portions 62a, 62b, 62c, and 62d are the first, second, third, and fourth light sources described later of the light source 8, respectively. The positional relationship is opposite to the light emitting surface (see FIG. 4).

また、導光部材６は、本実施形態の場合、指標板５と一体形成されている。具体的には、前記絞り加工後に貫通孔５５を打ち抜き加工した指標板５を図示しない成形金型内にセットし、前記成形金型を閉じた後、図示しない射出成形機を用いて導光部材６となる溶融樹脂を前記成形金型内に射出する。前記溶融樹脂を射出した後、前記溶融樹脂を冷却することにより固化させ、前記成形金型を開いて取り出すことにより、導光部材６と指標板５とが一体形成される。このことから導光部材６は、指標板５を補強する補強部材としての機能を有していることになる。 In the present embodiment, the light guide member 6 is integrally formed with the indicator plate 5. Specifically, the indicator plate 5 in which the through hole 55 is punched after the drawing process is set in a molding die (not shown), and after closing the molding die, a light guide member is used using an injection molding machine (not shown). 6 is injected into the molding die. After injecting the molten resin, the molten resin is solidified by cooling, and the molding die is opened and taken out, whereby the light guide member 6 and the indicator plate 5 are integrally formed. Accordingly, the light guide member 6 has a function as a reinforcing member for reinforcing the indicator plate 5.

指針用光源７は、例えば赤色光を発するチップ型発光ダイオードからなり、指針４の回転中心領域Ｒに対応する回路基板１上に複数個配置され、指示部４１を発光させる発光体である。 The pointer light sources 7 are, for example, chip-type light emitting diodes that emit red light. A plurality of pointer light sources 7 are arranged on the circuit board 1 corresponding to the rotation center region R of the pointer 4 and are light emitters that cause the indicator 41 to emit light.

光源８は、例えば白色光を発するチップ型発光ダイオードからなり、その発光面が導光部材６の各受光部６２ａ，６２ｂ，６２ｃ，６２ｄと対向するように回路基板１上に複数個配置され、各受光部６２ａ，６２ｂ，６２ｃ，６２ｄで光を受けて、指標板５（指標部５１）を背後から照明するための発光体である。なお、本実施形態の場合、光源８は、受光部６２の形成個数と同数の４個用いられ、具体的には指標板５を正面から見たときに指標板５を左右に略２等分する縦ラインＬ１上であって、且つ指針キャップ４２の上下に各々配置される第１，第２の光源８ａ，８ｂと、同様に指標板５を正面から見たときに指標板５を上下に略２等分する横ラインＬ２上であって、且つ指針キャップ４２の左右に各々配置される第３，第４の光源８ｃ，８ｄとを有している（図１参照）。 The light source 8 is composed of, for example, a chip-type light emitting diode that emits white light, and a plurality of light emitting surfaces are arranged on the circuit board 1 so that the light emitting surfaces thereof face the light receiving portions 62a, 62b, 62c, and 62d of the light guide member 6, A light emitter for receiving light from each of the light receiving portions 62a, 62b, 62c, and 62d and illuminating the indicator plate 5 (the indicator portion 51) from behind. In the case of the present embodiment, four light sources 8 are used in the same number as the number of light receiving portions 62 formed. Specifically, when the index plate 5 is viewed from the front, the index plate 5 is divided into approximately two equal parts. The first and second light sources 8a and 8b disposed on the vertical line L1 and above and below the pointer cap 42, respectively, and similarly when the index plate 5 is viewed from the front, the index plate 5 is moved up and down. The third and fourth light sources 8c and 8d are arranged on the horizontal line L2 that is substantially equally divided and on the left and right of the pointer cap 42 (see FIG. 1).

ケース体９は、例えば白色系の合成樹脂からなり、指標板５の平板部５６を保持するための保持部である第１の円筒部９１と、この第１の円筒部９１を取り巻くように配設され、指標板５の立壁部５９の内壁面に沿うように延びる第２の円筒部９２とを備えている。また、この場合、第１の円筒部９１は、指針用光源７を収納するための収納部としての機能、指針用光源７から発せられる光を指針４側へ反射する反射部としての機能を有している。 The case body 9 is made of, for example, white synthetic resin, and is arranged so as to surround the first cylindrical portion 91 that is a holding portion for holding the flat plate portion 56 of the indicator plate 5 and the first cylindrical portion 91. And a second cylindrical portion 92 extending along the inner wall surface of the standing wall portion 59 of the indicator plate 5. In this case, the first cylindrical portion 91 has a function as a storage portion for storing the pointer light source 7 and a function as a reflection portion that reflects light emitted from the pointer light source 7 toward the pointer 4 side. is doing.

なお、９３は、見返し部材１０を載置するための載置面であり、この載置面９３は、第２の円筒部９２における外壁面の略中央部から外方、つまり前記外壁面と略直交する方向に向けて延在しているものとする。一方、第２の円筒部９２における内壁面の略中央部から内方には、指標板５や導光部材６と所定間隔を有するように回路基板１側に傾斜して延び、第２の円筒部９２を補強するための補強部９４が形成されている。かかる補強部９４と回路基板１との当接面は、光源８よりもやや外側に位置しているため、光源８は、第１の円筒部９１と、補強部９４と、補強部９４と第２の円筒部９２の連結部分から上方に位置する第２の円筒部９２箇所とで囲まれる空洞部Ｓ内に収納される構成となる。 In addition, 93 is a mounting surface for mounting the facing member 10, and this mounting surface 93 is outward from a substantially central portion of the outer wall surface of the second cylindrical portion 92, that is, substantially the same as the outer wall surface. It is assumed that it extends in a direction orthogonal to each other. On the other hand, the second cylindrical portion 92 extends inward from the substantially central portion of the inner wall surface to the circuit board 1 side so as to have a predetermined distance from the indicator plate 5 and the light guide member 6, and the second cylindrical portion 92. A reinforcing portion 94 for reinforcing the portion 92 is formed. Since the contact surface between the reinforcing portion 94 and the circuit board 1 is located slightly outside the light source 8, the light source 8 includes the first cylindrical portion 91, the reinforcing portion 94, the reinforcing portion 94, and the first portion. It becomes a structure accommodated in the cavity part S enclosed by the 2nd cylindrical part 92 location located upwards from the connection part of the 2 cylindrical part 92. As shown in FIG.

見返し部材１０は、例えば黒色の合成樹脂からなり、指標板５の傾斜部５７や立壁部５９を取り巻くようにケース体９の載置面９３上に載置され、立壁部５９に対応する位置に利用者（運転者）の可視領域を定める開口部１０ａを備えている。 The facing member 10 is made of, for example, black synthetic resin, and is placed on the placement surface 93 of the case body 9 so as to surround the inclined portion 57 and the standing wall portion 59 of the indicator plate 5, and at a position corresponding to the standing wall portion 59. An opening 10a that defines the visible region of the user (driver) is provided.

かかる実施形態によれば、各光源８ａ，８ｂ，８ｃ，８ｄが点灯すると、各光源８ａ，８ｂ，８ｃ，８ｄから発せられる光は、その真上に位置する導光部材６における各受光部６２ａ，６２ｂ，６２ｃ，６２ｄの前記各底部を通じて各受光部６２ａ，６２ｂ，６２ｃ，６２ｄ内に供給され、そのまま前方に進み、導光部６１における指標板５の平板部５６背面に位置する円環板状からなる第１の導光部６３に到達する。 According to this embodiment, when each light source 8a, 8b, 8c, 8d is turned on, the light emitted from each light source 8a, 8b, 8c, 8d is each light-receiving part 62a in the light guide member 6 located right above it. , 62b, 62c, 62d are supplied into the respective light receiving portions 62a, 62b, 62c, 62d through the bottom portions, proceeding forward as they are, and the annular plate located on the back surface of the flat plate portion 56 of the indicator plate 5 in the light guide portion 61. The first light guide 63 having a shape is reached.

そして、第１の導光部６３に到達した各受光部６２ａ，６２ｂ，６２ｃ，６２ｄからの光は、円環板状からなる第１の導光部６３内部に導かれ、その後、指標板５の傾斜部５７背面に位置する略すり鉢形状傾斜面からなる第２の導光部６４内部、並びに指標板５の平坦部５８背面に位置する円環板状からなる第３の導光部６５内部に順次、導かれる構成となっている。このとき、第２の導光部６４から第３の導光部６５に導かれる光の一部が、傾斜部５７の周縁近傍に形成された指標部５１を透過することで、指標部５１の目盛５１ａ，数字５１ｂが白色で発光する。このことは、各光源８ａ，８ｂ，８ｃ，８ｄから発せられる光が、指針４の回転中心領域Ｒ側（指標板５の略中央部側）から外側（指標板５の周縁に位置する指標部５１や平坦部５８側）に向けて、導光部材６内部に放射状に導かれ、かかる導光部材６内部（受光部６２及び導光部６１）に放射状に導かれた光により、指標部５１の目盛５１ａ，数字５１ｂが白色で発光することを意味している。
And the light from each light-receiving part 62a, 62b, 62c, 62d which reached | attained the 1st light guide part 63 is guide | induced to the inside of the 1st light guide part 63 which consists of an annular plate shape, and, after that, the index plate 5 The inside of the second light guide 64 made of a substantially mortar-shaped inclined surface located on the back surface of the inclined portion 57 and the inside of the third light guide portion 65 made of an annular plate located on the back surface of the flat portion 58 of the indicator plate 5. It is the structure led to sequentially. At this time, a part of the light guided from the second light guide part 64 to the third light guide part 65 passes through the indicator part 51 formed in the vicinity of the peripheral edge of the inclined part 57, so that the indicator part 51 The scale 51a and the number 51b emit white light. This is because the light emitted from each of the light sources 8a, 8b, 8c, and 8d is an indicator portion located on the periphery of the indicator plate 5 from the rotation center region R side of the pointer 4 (substantially central portion side of the indicator plate 5). 51 and the flat portion 58 side), the indicator portion 51 is radially guided into the light guide member 6 and light guided radially into the light guide member 6 (the light receiving portion 62 and the light guide portion 61). This means that the scale 51a and the number 51b emit light in white.

ところで、本実施形態では、特に導光部６１の第１，第２の導光部６３，６４内部を通過する光が、第１，第２の導光部６３，６４と密着する指標板５における透光性基板５４の背面箇所（平板部５６並びに傾斜部５７の背面）に形成される鏡面層からなる反射部５３によって減衰されずにそのまま第３の導光部６５（指標部５１側）に導かれ、従来のように指標板の背景をなすように透光性基板に形成された黒色等の地色部にあたって減衰されないことから、このように略すり鉢形状からなる指標板５の背面に沿うように導光部材が一体形成されることで導光経路が通常より長くなる場合であっても、光源からの光が指標部５１にロスなく導かれるため、照明効率（導光効率）の低下を防止することができる。 By the way, in this embodiment, the indicator plate 5 in which the light passing through the first and second light guide parts 63 and 64 of the light guide part 61 is in close contact with the first and second light guide parts 63 and 64 in particular. The third light guide part 65 (indicator part 51 side) as it is without being attenuated by the reflection part 53 made of a mirror surface layer formed on the back part of the translucent substrate 54 (back face of the flat plate part 56 and the inclined part 57). Since it is not attenuated by the ground color portion such as black formed on the translucent substrate so as to form the background of the indicator plate as in the prior art, the back of the indicator plate 5 having a substantially mortar shape is thus formed. Even if the light guide path is longer than usual by integrally forming the light guide member along the line, the light from the light source is guided to the index part 51 without loss, so that the illumination efficiency (light guide efficiency) is improved. A decrease can be prevented.

また本実施形態では、指標板５と導光部材６とは、インサート成形によって一体的に形成されてなることによって、計器装置の組み付け時に指標板５と導光部材６とを組み付ける工程が不要となるため、生産性を向上させることができる。 In the present embodiment, the indicator plate 5 and the light guide member 6 are integrally formed by insert molding, so that the step of assembling the indicator plate 5 and the light guide member 6 is not required when the instrument device is assembled. Therefore, productivity can be improved.

また本実施形態では、指針４の回転中心領域Ｒ近傍、つまり略すり鉢形状からなる導光部６１の底部に４つの受光部６２が連続形成されており、かかる各受光部６２と対向するように４つの光源８が回転中心領域Ｒ近傍に対応する回路基板１上に集中配置されていることにより、光源の個数を必要最小限とすることができ、コスト上昇を抑制することが可能となる。 Further, in the present embodiment, four light receiving portions 62 are continuously formed in the vicinity of the rotation center region R of the pointer 4, that is, the bottom portion of the light guide portion 61 having a substantially mortar shape, so as to face each of the light receiving portions 62. Since the four light sources 8 are centrally arranged on the circuit board 1 corresponding to the vicinity of the rotation center region R, the number of light sources can be minimized, and an increase in cost can be suppressed.

また本実施形態では、鏡面層からなる反射部５３が、背景部５２に対応するように透光性基板５４背面の全ての領域に印刷形成されている場合について説明したが、反射部５３は、必要に応じて透光性基板５４背面の所要部のみに設けることも可能である。 Further, in the present embodiment, the case where the reflective portion 53 made of a mirror surface layer is printed and formed in all areas on the back surface of the translucent substrate 54 so as to correspond to the background portion 52 has been described. If necessary, it can be provided only in a required portion on the rear surface of the translucent substrate 54.

例えば第３の光源８ｃに対応して反射部５３を速度数字「０」から「６０」の範囲内で形成する場合の一例を図５に示す。なお、速度数字側に配設されている他の第１の光源８ａや第４の光源８ｄにおいても、図示は省略するが、以下に説明するような構成を基本構成として、速度数字「６０」から「１２０」並びに速度数字「１２０」から「１８０」に反射部５３がそれぞれ形成されているものとする。 For example, FIG. 5 shows an example in which the reflecting portion 53 is formed within the range of speed numbers “0” to “60” corresponding to the third light source 8c. The other first light source 8a and the fourth light source 8d arranged on the speed number side are not shown in the figure, but the speed number “60” is based on the configuration described below as a basic configuration. It is assumed that the reflection portions 53 are formed from “120” to “120” and speed numbers “120” to “180”.

すなわち、第３の光源８ｃに対応するように透光性基板５４背面に反射部５３を形成するにあたっては、速度数字「０」から「６０」に至る各数字５１ｂのうち、第３の光源８２ｃからの距離が比較的近い速度数字「２０」や「４０」からなる数字５１ｃ箇所は、反射部５３の形成領域が、指標板５を正面から見たときに、貫通部６６内壁面から第３の光源８ｃと数字５１ｃとの略中間点に至る領域までとし、第３の光源８ｃからの距離が比較的遠い速度数字「０」や「６０」からなる数字５１ｄ箇所は、反射部５３の形成領域が、指標板５を正面から見たときに、貫通部６６内壁面から各数字５１ｄ近傍に至る領域までとすることを基本構成とする。このことは、第３の光源８ｃからの距離が遠くに設定されている速度数字程、速度数字近傍まで反射部５３を形成するようにしてもよい、ということを意味している。なお、この場合、速度数字の形成されていない第２の光源８ｂ側においては、反射部５３の形成は不要である。 That is, in forming the reflective portion 53 on the back surface of the translucent substrate 54 so as to correspond to the third light source 8c, the third light source 82c among the numbers 51b ranging from the speed numbers “0” to “60”. The numeral 51c consisting of speed numerals “20” and “40” that are relatively close to each other has a third region from the inner wall surface of the penetration part 66 when the reflecting plate 53 is formed when the indicator plate 5 is viewed from the front. The region up to a substantially intermediate point between the light source 8c and the number 51c and the number 51d of the speed numbers “0” and “60” that are relatively far from the third light source 8c are formed on the reflective portion 53. The basic configuration is that the region extends from the inner wall surface of the through portion 66 to the vicinity of each numeral 51d when the indicator plate 5 is viewed from the front. This means that the reflecting portion 53 may be formed to the vicinity of the speed number as the speed number is set to be farther away from the third light source 8c. In this case, it is not necessary to form the reflecting portion 53 on the second light source 8b side where no speed number is formed.

また本実施形態では、指標部５１と背景部５２とが透光性基板５４の前面側に印刷形成され、反射部５３が背景部５２に対応するように透光性基板５４の背面側に印刷形成されている場合について説明したが、反射部５３は、背景部５２の背面側に位置していればよく、例えば指標部５１と背景部５２とを透光性基板５４の背面に形成し、反射部５３を背景部５２に対応するように背景部５２に重ねて透光性基板５４の背面側に形成してもよい。 In the present embodiment, the indicator portion 51 and the background portion 52 are printed on the front side of the translucent substrate 54, and the reflecting portion 53 is printed on the back side of the translucent substrate 54 so as to correspond to the background portion 52. Although the case where it is formed has been described, the reflecting portion 53 only needs to be located on the back side of the background portion 52. For example, the indicator portion 51 and the background portion 52 are formed on the back surface of the translucent substrate 54, The reflective portion 53 may be formed on the back side of the translucent substrate 54 so as to overlap the background portion 52 so as to correspond to the background portion 52.

（第２実施形態）次に、図６から図９を用いて、本発明の第２実施形態を説明するが、前述した第１実施形態と同一もしくは相当個所には、同一符号を付してその詳細な説明は省略する。なお、図６は本第２実施形態における計器装置の正面図、図７は同第２実施形態による計器装置の要部断面図、図８は同第２実施形態による導光部材の正面図、図９は図８のＣ−Ｃ断面図を示している。 (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 9. The same or corresponding parts as those in the first embodiment described above are denoted by the same reference numerals. Detailed description thereof is omitted. 6 is a front view of the instrument device according to the second embodiment, FIG. 7 is a cross-sectional view of the main part of the instrument device according to the second embodiment, and FIG. 8 is a front view of the light guide member according to the second embodiment. FIG. 9 shows a cross-sectional view taken along the line CC of FIG.

この第２実施形態が、前記第１実施形態と比べて異なる点は、指標板５に設けた鏡面層からなる反射部５３、各光源８のうち縦ラインＬ１上における指針キャップ４２の下方に位置していた第２の光源８ｂ、並びに第２の光源８ｂに対向するように導光部材６に設けられていた第２の受光部６２ｂを廃止し、指針４の回動範囲とそれ以外の領域（つまり、指針４の回動範囲外となる領域）との境界となる２つの境界線Ｋに対応するように、導光部材６における略すり鉢状傾斜面からなる第２の導光部６４の背面並びに第２の導光部６４を取り巻く第３の導光部６５の背面に通常部分の肉厚形状よりも肉薄となる一対の溝部２０を設けた点である。 The second embodiment differs from the first embodiment in that the reflecting portion 53 made of a mirror layer provided on the indicator plate 5 and the position of the light source 8 below the pointer cap 42 on the vertical line L1. The second light source 8b and the second light receiving portion 62b provided on the light guide member 6 so as to face the second light source 8b are eliminated, and the rotation range of the pointer 4 and other regions are removed. That is, the second light guide portion 64 having a substantially mortar-shaped inclined surface in the light guide member 6 so as to correspond to the two boundary lines K that are the boundaries with the region outside the rotation range of the pointer 4. This is that a pair of groove portions 20 that are thinner than the thickness of the normal portion are provided on the back surface and the back surface of the third light guide portion 65 that surrounds the second light guide portion 64.

なお、ここで言う指針４の前記回動領域とは、指針４の回動に伴い、指針４（指示部４１）が、指針４の回転軌道に沿い指標板５に円弧状に配列された「０から１８０」までの数字５１ｂや、前記利用者が数字５１ｂよりも詳細情報を確認できるように数字５１ｂの外側に複数、数字５１ｂと同心円上に配列された目盛５１ａを指示可能な領域を示すものである。これに対し、指針４の前記回動範囲外となる領域とは、指針４が回動しない部分、つまり指標板５に指針４が指示可能な目盛５１ａや数字５１ｂの施されていない領域を示すものである。 The rotation area of the pointer 4 referred to here is that the pointer 4 (instruction unit 41) is arranged in an arc shape on the indicator plate 5 along the rotation path of the pointer 4 as the pointer 4 rotates. A number 51b from 0 to 180 "and an area where a plurality of scales 51a arranged concentrically with the number 51b can be indicated outside the number 51b so that the user can confirm more detailed information than the number 51b. Is. On the other hand, the region outside the rotation range of the pointer 4 indicates a portion where the pointer 4 does not rotate, that is, a region where the scale 51a or the number 51b that the pointer 4 can instruct the indicator plate 5 is not provided. Is.

従って、かかる第２実施形態の場合、指針４の前記回動領域に対応して備えられる第２の光源８ｂ以外の他の光源８ａ，８ｃ，８ｄと、これら他の光源８ａ，８ｃ，８ｄに対向する受光部６２ａ，６２ｃ，６２ｄ及び一対の溝部２０を有する導光部６１とからなる導光部材６を用いて、目盛５１ａや数字５１ｂを背後から照明する構成となる。 Accordingly, in the case of the second embodiment, the light sources 8a, 8c, 8d other than the second light source 8b provided corresponding to the rotation region of the pointer 4 and these other light sources 8a, 8c, 8d are used. The scale 51a and the numbers 51b are illuminated from behind using the light guide member 6 including the light receiving parts 62a, 62c, 62d facing each other and the light guide part 61 having the pair of grooves 20.

そして、本第２実施形態の特徴点である、境界線Ｋに対応して導光部６１における第２，第３の導光部６４，６５背面に形成される一対の溝部２０について図８、図９を用いて説明すると、一対の溝部２０は、断面凹部形状からなり、第３の受光部６２ｃを通じて導光部６１内に供給される第３の光源８ｃからの光が、速度数字「０〜６０」である数字５１ｂや速度数字「０〜６０」に対応する目盛５１ａ箇所に効率よく進むように、また第４の受光部６２ｄを通じて導光部６１内に供給される第４の光源８ｄからの光が、速度数字「１１２０〜１８０」である数字５１ｂや速度数字「１２０〜１８０」に対応する目盛５１ａ箇所に効率よく進むように、光の進行方向を規制する規制手段Ｄとしての機能を有している。特に、この場合、光が到達しにくい速度数字「０」や「１８０」である数字５１ｂやこれら速度数字の外側に位置する目盛５１ａ箇所に効率よく光が進むように設定されている。 FIG. 8 shows a pair of groove portions 20 formed on the back surfaces of the second and third light guide portions 64 and 65 in the light guide portion 61 corresponding to the boundary line K, which is a characteristic point of the second embodiment. Referring to FIG. 9, the pair of grooves 20 has a concave cross-sectional shape, and the light from the third light source 8 c supplied into the light guide 61 through the third light receiving part 62 c is the velocity number “0”. The fourth light source 8d supplied into the light guide unit 61 through the fourth light receiving unit 62d so as to efficiently advance to the position of the scale 51a corresponding to the number 51b and the speed number "0 to 60". Function as a regulating means D that regulates the traveling direction of the light so that the light from the light efficiently travels to the position of the scale 51a corresponding to the number 51b that is the speed number "1120 to 180" and the speed number "120 to 180" have. In particular, in this case, the light is set so that the light efficiently travels to the number 51b that is a speed number “0” or “180” that is difficult for light to reach, or the scale 51a located outside the speed number.

言い換えると、かかる溝部２０である規制手段Ｄは、上述したように受光部６２ｃ，６２ｄで受けた光源８ｃ，８ｄからの光が指標部５１の施されている、ある一定の所定範囲内（例えば速度数字「０〜６０」や「１２０〜１８０」となる数字５１ｂやこれら速度数字に対応する目盛５１ａ）を進むように、光の進行方向を規制するものである。この規制手段Ｄの構成をもう少し詳細に説明するなら、各溝部２０における境界線Ｋに沿った指標部５１側に位置する指標側内壁面２１が、導光部６１（第２の導光部６４）内に供給される光を前記ある一定の所定範囲内に反射導光させ、前記ある一定の所定範囲内に到達する光量を補うための反射面としての機能を有していることになる。このことは、前記反射面である指標側内壁面２１が、第２の導光部６４内に供給される光の進む向きを変える規制手段Ｄであることを意味している。 In other words, the restricting means D that is the groove portion 20 is within a certain predetermined range in which the light from the light sources 8c and 8d received by the light receiving portions 62c and 62d is applied to the index portion 51 as described above (for example, The traveling direction of the light is regulated so as to go through the numbers 51b which become speed numbers “0 to 60” and “120 to 180” and scales 51a) corresponding to these speed numbers. To describe the configuration of the restricting means D in more detail, the indicator-side inner wall surface 21 located on the indicator portion 51 side along the boundary line K in each groove portion 20 includes the light guide portion 61 (second light guide portion 64). ) Is reflected and guided within the certain predetermined range, and has a function as a reflection surface for compensating the amount of light reaching the certain predetermined range. This means that the indicator-side inner wall surface 21 that is the reflection surface is a regulating means D that changes the traveling direction of the light supplied into the second light guide portion 64.

従って、かかる第２実施形態によれば、前述した第１実施形態のように指標板５の所要部に鏡面層からなる反射部５３を形成せずに、指針４の前記回動範囲と指針４の前記回動範囲外との境界において、指針４の前記回動範囲外に向かう第３，第４の光源８ｃ，８ｄからの光が、溝部２０の長手方向一側面を構成する指標側内壁面２１によって、指針４の前記回動範囲側（前記ある一定の所定範囲内）に反射導光されるため、指針４の前記回動範囲外に向かう光のロスが抑制され、速度数字「０〜６０」や「１２０〜１８０」である数字５１ｂ並びにこれら速度数字に対応する目盛５１ａ箇所を含む指標部５１全体を効率よく照明することが可能となり、前記第１実施形態と同様の作用効果を得ることができる。 Therefore, according to the second embodiment, the rotation range of the pointer 4 and the pointer 4 are not formed in the required portion of the index plate 5 as in the first embodiment described above without forming the reflecting portion 53 made of a mirror surface layer. The light from the third and fourth light sources 8c, 8d heading out of the rotation range of the pointer 4 at the boundary with the outside of the rotation range of the indicator side inner wall surface constituting one side surface in the longitudinal direction of the groove portion 20 21, the light is reflected and guided to the rotation range side of the pointer 4 (within the certain predetermined range), so that the loss of light toward the outside of the rotation range of the pointer 4 is suppressed. It is possible to efficiently illuminate the entire index portion 51 including the numeral 51b such as “60” and “120 to 180” and the scale 51a corresponding to these speed numerals, and the same effect as the first embodiment can be obtained. be able to.

また本第２実施形態では、規制手段Ｄが、指針４の前記回動範囲と指針４の前記回動範囲外との境界に形成された一対の溝部２０からなることにより、シンプルな構成で、光の進む向きを容易に変えることが可能となる。 Further, in the second embodiment, the restricting means D includes a pair of groove portions 20 formed at the boundary between the rotation range of the pointer 4 and the outside of the rotation range of the pointer 4, thereby having a simple configuration. It is possible to easily change the direction in which the light travels.

また本第２実施形態では、溝部２０の一側面を構成する指標側内壁面２１が、平坦面からなる場合について説明したが、例えば指標側内壁面２１を図１０に示すような屈曲した複数（例えば３つ）の反射面２１ａ，２１ｂ，２１ｃからなる構成としてもよい。 In the second embodiment, the case has been described in which the index-side inner wall surface 21 constituting one side surface of the groove portion 20 is a flat surface. For example, the index-side inner wall surface 21 is bent as shown in FIG. For example, it is good also as a structure which consists of three reflective surfaces 21a, 21b, and 21c.

また前記各実施形態では、指標板５の傾斜部５７を取り巻く平坦部５８並びに平坦部５８の背後に重なる導光部材６の第３の導光部６５が、ともに略円環板状からなる例について説明したが、例えば略円環板状からなる平坦部５８に円環状の貫通孔部を設け、第３の導光部６５の表面に前記貫通孔部を貫通して前方側に延びる略筒形状からなるリング部材を一体形成することも可能である。このように前記リング部材を第３の導光部６５、つまり導光部材６に一体形成することで、専用のリング部材を別部材として製作することが不要となるのでコスト上昇を抑制することができる。 Moreover, in each said embodiment, the 3rd light guide part 65 of the light guide member 6 which overlaps behind the flat part 58 surrounding the inclination part 57 of the parameter | index plate 5 and the flat part 58 is a substantially annular plate shape. However, for example, an annular through-hole portion is provided in the flat portion 58 having a substantially annular plate shape, and a substantially cylinder extending forward through the through-hole portion on the surface of the third light guide portion 65. It is also possible to integrally form a ring member having a shape. Thus, by integrally forming the ring member in the third light guide portion 65, that is, the light guide member 6, it is not necessary to manufacture a dedicated ring member as a separate member, thereby suppressing an increase in cost. it can.

また前記各実施形態では、指標部５１の目盛５１ａ，数字５１ｂを傾斜部５７の周縁に設けた例について説明したが、例えば指標部５１の数字５１ｂを傾斜部５７の周縁に設け、指標部５１の目盛５１ａを平坦部５８に設けてもよい。 In each of the above embodiments, the scale 51a and the number 51b of the indicator 51 are provided on the periphery of the inclined portion 57. For example, the number 51b of the indicator 51 is provided on the periphery of the inclined portion 57. The scale 51a may be provided on the flat portion 58.

なお前記各実施形態では、指標部５１の目盛５１ａ，数字５１ｂが、白色系の透光性インクにより印刷形成されていた例について説明したが、例えば指標部５１の目盛５１ａ，数字５１ｂは、背景部５２の印刷にあたり目盛５１ａ，数字５１ｂとなる部分を抜き印刷することで、背景部５２を形成する印刷層が形成されない抜き印刷部として形成してもよい。なお、この場合、前記抜き印刷部を通じて導光部６１（第２，第３の導光部６４，６５）の所定箇所が部分的に臨む構成となり、この導光部６１（第２，第３の導光部６４，６５）の前記所定箇所にて意匠である指標部５１の目盛５１ａ，数字５１ｂが形成されることになる。 In each of the above-described embodiments, the scale 51a and the number 51b of the index part 51 have been described as being printed with white translucent ink. However, for example, the scale 51a and the number 51b of the index part 51 have a background When printing the portion 52, the portion to be the scale 51 a and the number 51 b may be punched and printed to form a blank printing portion in which the printing layer forming the background portion 52 is not formed. In this case, a predetermined portion of the light guide unit 61 (second and third light guide units 64 and 65) partially faces through the punched printing unit, and the light guide unit 61 (second and third units) is faced. The scale 51a and the number 51b of the indicator 51, which is a design, are formed at the predetermined locations of the light guides 64 and 65).

本発明の第１実施形態による計器装置の正面図である。It is a front view of the instrument apparatus by 1st Embodiment of this invention. 図１のＡ−Ａ断面図である。It is AA sectional drawing of FIG. 図２の一部を拡大して示す要部断面図である。FIG. 3 is an enlarged cross-sectional view of a main part showing a part of FIG. 2. 同実施形態による導光部材の正面図である。It is a front view of the light guide member by the embodiment. 同実施形態による他の反射部の形成範囲を示す図である。It is a figure which shows the formation range of the other reflection part by the embodiment. 本発明の第２実施形態による計器装置の正面図である。It is a front view of the instrument apparatus by 2nd Embodiment of this invention. 同第２実施形態による計器装置の要部断面図である。It is principal part sectional drawing of the meter apparatus by the 2nd Embodiment. 同第２実施形態による導光部材の正面図である。It is a front view of the light guide member by the 2nd embodiment. 図８のＣ−Ｃ断面図である。It is CC sectional drawing of FIG. 同第２実施形態による規制手段の変形例を示す図である。It is a figure which shows the modification of the control means by the 2nd Embodiment.

Explanation of symbols

４指針
５指標板
６導光部材
８光源
２０溝部
２１指標側内壁面
４１指示部
５１指標部
５１ａ目盛
５１ｂ数字
５２地色部（背景部）
５３反射部（鏡面層）
５６平板部
５７傾斜部
５８平坦部
６１導光部
６２受光部
６３第１の導光部
６４第２の導光部
６５第３の導光部
Ｄ規制手段
Ｋ境界線 4 Pointer 5 Index plate 6 Light guide member 8 Light source 20 Groove portion 21 Index side inner wall surface 41 Pointer portion 51 Index portion 51a Scale 51b Number 52 Ground color portion (background portion)
53 Reflector (mirror layer)
56 flat plate portion 57 inclined portion 58 flat portion 61 light guide portion 62 light receiving portion 63 first light guide portion 64 second light guide portion 65 third light guide portion D regulating means K boundary line

Claims

A pointer that is rotationally driven by the rotation shaft of the driving device;
An indicator plate having a three-dimensional shape provided with an indicator portion instructed by the pointer and a ground color portion that forms the background of the indicator portion;
A light guide member disposed behind the indicator plate, receiving light from a light source at a light receiving unit, and illuminating the indicator plate from behind;
The indicator plate has the three-dimensional shape having a flat plate portion having a through-hole through which the rotation shaft passes and an inclined portion extending forward of the flat plate portion so as to surround the flat plate portion, The indicator portion is formed on the inclined portion,
The light guide member has a first light guide portion disposed along the back surface of the flat plate portion, and a second light guide portion disposed along the back surface of the inclined portion,
The indicator plate and the light guide member are integrally formed, and the indicator plate has a reflective portion having a high light reflectance with respect to the ground color portion at least in a required portion on the back side of the ground color portion. Ri name is formed,
The instrument device according to claim 1, wherein a plurality of the light receiving portions are suspended from the first light guide portion disposed in the vicinity of the rotation shaft so as to face the plurality of light sources, respectively .

2. The instrument device according to claim 1, wherein the reflecting portion is made of a mirror surface layer.

A pointer that is rotationally driven by the rotation shaft of the driving device;
An indicator plate having a three-dimensional shape with an indicator portion instructed by the pointer;
A light guide member disposed behind the indicator plate, receiving light from a light source at a light receiving unit, and illuminating the indicator plate from behind;
The indicator plate has the three-dimensional shape having a flat plate portion having a through-hole through which the rotation shaft passes and an inclined portion extending forward of the flat plate portion so as to surround the flat plate portion, The indicator portion is formed on the inclined portion,
The light guide member has a first light guide portion disposed along the back surface of the flat plate portion, and a second light guide portion disposed along the back surface of the inclined portion,
The indicator plate and the light guide member are integrally formed, and light is received by the light guide member so that light received by the light receiving portion travels within a predetermined range where the indicator portion is applied. There is a regulation means to regulate the direction of travel ,
The instrument device according to claim 1, wherein a plurality of the light receiving portions are suspended from the first light guide portion disposed in the vicinity of the rotation shaft so as to face the plurality of light sources, respectively .

4. The instrument device according to claim 3, wherein the restricting means comprises a groove formed at a boundary between the turning range of the pointer and the outside of the turning range of the pointer.

The instrument device according to claim 1, wherein the indicator plate and the light guide member are integrally formed by insert molding.