The invention belongs to the technical field of aerospace, and particularly relates to an expandable light shield, which comprises a plurality of mutually nested light shield lens cones with two states of expansion and contraction; the first elastic elements are arranged between the adjacent shading lens cones and used for unfolding the shading lens cones; the supporting frame is fixedly connected with the shading lens cone on the innermost side, and an annular cavity is formed in the supporting frame; the trigger element is arranged in the annular cavity; the second elastic element is located in the annular cavity, one end of the second elastic element is arranged on the inner wall of the annular cavity, and the other end is connected with the trigger element; the memory alloy wire is located in the annular cavity, one end of the memory alloy wire is arranged on the inner wall of the annular cavity, and the other end of the memory alloy wire is connected with the trigger element. According to the light shield, the memory alloy wire is adopted for driving unlocking, and the light shield has the advantages of being safe, efficient, free of pollution and the like.

    本发明属于航空航天技术领域,尤其涉及一种可展开遮光罩,包括:多个相互嵌套的遮光镜筒,其具有展开和收缩两种状态;第一弹性元件,设置在相邻遮光镜筒之间,用于将遮光镜筒展开;支撑架,与最内侧的遮光镜筒固定相连,支撑架内具有环形腔室;触发元件,设置于环形腔室内;第二弹性元件,位于环形腔室内,且一端设置于环形腔室的内壁上,另一端与触发元件相连;记忆合金丝,位于环形腔室内,且一端设置于环形腔室的内壁上,另一端与触发元件相连。本发明的遮光罩,采用记忆合金丝驱动解锁,具有安全、高效、无污染等特点。


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    Title :

    Unfoldable light shield


    Additional title:

    一种可展开遮光罩


    Contributors:
    FU JIALI (author)

    Publication date :

    2023-02-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B64G Raumfahrt , COSMONAUTICS



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