To provide a mirror unit that is formed in a mirror holder and can suppress variation in an entire thickness of a rotation center shaft even if a length of the rotation center shaft inserted into a coil spring becomes long in the mirror unit having the mirror holder made of a resin in which a reflection mirror is fixed and the coil spring for urging the mirror holder.SOLUTION: In a mirror unit, a rotation center shaft 10b of a mirror holder 10 has a part 10e to be supported that is rotatably supported by a frame, and at least an outer peripheral surface of the part 10e to be supported is a cylindrical surface 10g. An axial thinned part 10j recessed in an axial direction from an end face in a direction of Y2 of the rotation center shaft 10b is formed in a cylindrical surface formation part 10h as a part in which the cylindrical surface 10g is formed of the rotation center shaft 10b, and plural axial thinned parts 10k recessed in a radial direction from an outer peripheral surface of the rotation center shaft 10b are formed in a part in a side of a direction of Y1 relative to the cylindrical surface formation part 10h of the rotation center shaft 10b.SELECTED DRAWING: Figure 5

    【課題】反射ミラーが固定される樹脂製のミラーホルダーと、ミラーホルダーを付勢するコイルバネとを備えるミラーユニットにおいて、ミラーホルダーに形成されるとともにコイルバネに挿通される回動中心軸の長さが長くなっても、回動中心軸の全体の肉厚のばらつきを抑制することが可能なミラーユニットを提供する。【解決手段】このミラーユニットでは、ミラーホルダー10の回動中心軸10bは、フレームに回動可能に支持される被支持部10eを備えており、少なくとも被支持部10eの外周面は、円柱面10gとなっている。回動中心軸10bの、円柱面10gが形成された部分である円柱面形成部10hには、回動中心軸10bのY2方向の端面から軸方向に窪む軸方向肉抜き部10jが形成され、回動中心軸10bの、円柱面形成部10hよりもY1方向側の部分には、回動中心軸10bの外周面から径方向に窪む径方向肉抜き部10kが複数形成されている。【選択図】図5


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    Title :

    MIRROR UNIT AND HEAD-UP DISPLAY DEVICE


    Additional title:

    ミラーユニットおよびヘッドアップディスプレイ装置


    Contributors:

    Publication date :

    2021-10-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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