| 摘要 |
A projection system is provided to control the angle of a mirror easily and prevent the angle of the mirror from being distorted by an external force, by joining the mirror to a movable portion. A projection system comprises a base, a reflection type case fixed to the base, and a folding mirror assembly(100) joined to the reflection type case. The folding mirror assembly(100) includes a cover(110) fixed to the reflection type case, a movable portion(130) shakably joined to the cover(110), and a mirror(140) joined to a front face of the movable portion(130). The projection system further comprises a plurality of screws connecting the movable portion(130) and the cover(110), and springs(120) putted on outer circumferences of the screws to prevent the shake of the movable portion(130).
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