Cat eye door lock

The utility model discloses a cat eye door lock, and relates to the technical field of cat eye door locks. The door lock comprises a door lock body, a barrel is rotationally arranged on the door lock body, a first concave lens, a convex lens and a second concave lens are distributed in the barrel at intervals, the first concave lens and the second concave lens are perpendicularly distributed, and a plane mirror parallel to the second concave lens or forming a 45-degree included angle with the second concave lens is rotationally arranged in the barrel. During use, all scenes outside a door can be seen clearly by additionally arranging the second concave lens which is perpendicular to the first concave lens, rotating the cylinder body and adjusting the state of the plane mirror, so that multi-angle exploration is realized, the danger is reduced, and the safety is improved. 本申请公开了一种猫眼门锁，涉及猫眼门锁技术领域。本申请包括：门锁主体，其上转动设置有筒体，所述筒体内设置有间隔分布的第一凹透镜、凸透镜以及第二凹透镜，所述第一凹透镜与第二凹透镜垂直分布，所述筒体内转动设置有与第二凹透镜平行或形成四十五度夹角的平面镜。本申请在使用时，通过额外增加的