Security door peep hole

Abstract

The invention relates to a security door peep hole. The security door peep hole comprises a peep hole body A and a peep hole body B, wherein a light passing tube is vertically connected between the peep hole body A and the peep hole body B, a reflector A is disposed at the connection of the peep hole body A and the light passing tube, a reflector B is disposed at the connection of the peep hole body B and the light passing tube, the reflector A and the reflector B are parallel with each other, the reflectors, rotary shafts and a control plate form a reflector adjusting mechanism, the reflector A can rotate around the rotary shaft A, the reflector B can rotate around the rotary shaft B, the rotary shafts are connected with the control plate, and the angles between the reflectors and a horizontal plane can be adjusted when the control plate is moved up and down. The security door peep hole has the advantages that one peep hole body is disposed at a high position, the other peep hole body is disposed at a low position, the two peep hole bodies are connected through the light passing tube, the reflectors at the connections of the people hole bodies and the light passing tube can be rotated, the periscope principle is used, the situation of the low position can be observed from the high position, the situation of the high position can be observed from the low position, problems brought by people height differences are solved, and observation of different outdoor positions is achieved.

Description

technical field [0001] The invention relates to the field of peepholes for anti-theft doors, in particular to a peephole which is suitable for people of different heights and can simultaneously observe outdoor high and low positions. Background technique [0002] Cat's eye is a common name for door mirrors, which are generally installed on anti-theft doors. When someone knocks on the door from the outside, it is an optical device that is convenient for observing the outdoor situation from the indoor, but the indoor situation cannot be seen from the outdoor. The cat's eye of the anti-theft door is mainly composed of two lenses, one convex lens and one concave lens. The cat's eye under the prior art is generally installed in a fixed position, and can only observe the outdoor situation from one position. There are also cat's eyes that adopt the periscope type, which can see the situation of the high place from the low place. [0003] The above-mentioned two kinds of cat's eye...

AI Technical Summary

Problems solved by technology

[0003] Both of the above-mentioned cat eyes cannot realize the scene of seeing outdoor high and low positions at the same time

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