Novel door peep hole

Abstract

A novel door peep hole is characterized by comprising a concave lens 1, a convex lens 2, a reflecting mirror 3 and a rotary barrel frame 4. The convex lens 2 is an ocular lens, the concave lens 1 is an objective lens, the reflecting mirror 3 is mounted in the middle of the rotary barrel frame 4, an included angle is 90 degrees, an object is refracted to the reflecting mirror 3 through the concave lens 1, and then is reflected to the convex lens 2, and then a host in a house can see action of persons out of a door.

Description

technical field [0001] The invention relates to a cat's eye, in particular to a novel cat's eye installed on an anti-theft door. Background technique [0002] The security door must be installed in every family, and each door is installed with a cat's eye that can see the outside. When someone knocks on the door, the owner can observe the person outside through the cat's eye, whether it is an acquaintance or a stranger. Determine whether to open the door. However, the ordinary cat's eye observation has a limited viewing angle and can only observe the front. If a thief or a liar is encountered, they squat down after knocking on the door, and the owner cannot observe who is coming through the cat's eye. At this time, the owner wants to know who is knocking on the door. , will open the door, at this time the liar will take the opportunity to forcibly break in, causing bad consequences to the owner. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to...

AI Technical Summary

Problems solved by technology

But ordinary cat eyes have a limited viewing angle and can only observe the front. If you encounter thieves or swindlers, they squat down after knocking on the door, and the owner cannot observe who is coming through the cat eyes. At this time, the owner wants to find out who is knocking , will open the door, at this time the scammer will take the opportunity to force his way in, causing bad consequences to the owner

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