To provide a pointer for a vehicle display device which can uniformize a luminance distribution.SOLUTION: A pointer for a vehicle display device includes: a light transmissive pointer body 2 having a shaft part 21 for receiving light irradiated from a tip side, a pointer part 22 extending in a first direction X, and a light guide part 23 in which the shaft part and the pointer part are connected and an air layer 2a; and a light shielding covering part for covering the light guide part from an opposite side of the shaft part. The light guide part has a reflection surface 25 which is a boundary surface with the air layer and which reflects light incident from the shaft part toward the pointer part, and the reflection surface is a curved surface which is curved toward the air layer side and which approaches to the pointer part along the first direction as it is far away from the shaft part along an axial direction. The reflection surface has a first curved surface 25a located on the shaft part side in the axial direction and a second curved surface 25b located closer to the opposite side to the shaft part than the first curved surface, and a curvature radius of the second curved surface is larger than a curvature radius of the first curved surface.SELECTED DRAWING: Figure 10

    【課題】輝度の分布を均一化させることができる車両表示装置用指針を提供する。【解決手段】車両表示装置用指針は、先端側から照射される光を受光する軸部21と、第一方向Xに延在する指針部22と、軸部と指針部とをつなぎ、かつ空気層2aが形成された導光部23と、を有する透光性の指針本体2と、導光部を軸部とは反対側から覆う遮光性の被覆部と、備える。導光部は、空気層との境界面であって、軸部から入射する光を指針部に向けて反射する反射面25を有し、反射面は、空気層側に向けて湾曲しており、かつ軸方向に沿って軸部から遠ざかるに従って第一方向に沿って指針部へと近づく湾曲面である。反射面は、軸方向における軸部側に位置する第一湾曲面25aと、第一湾曲面よりも軸部側とは反対側に位置する第二湾曲面25bと、を有し、第二湾曲面の曲率半径は、第一湾曲面の曲率半径よりも大きい。【選択図】図10


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    Title :

    POINTER FOR VEHICLE DISPLAY DEVICE


    Additional title:

    車両表示装置用指針


    Contributors:

    Publication date :

    2019-09-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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