CN201034008Y

CN201034008Y - Anti-theft gate one-way visible opal

Info

Publication number: CN201034008Y
Application number: CNU200720037810XU
Authority: CN
Inventors: 张瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-21
Filing date: 2007-05-21
Publication date: 2008-03-12
Anticipated expiration: 2017-05-21

Abstract

The utility model relates to a housing security device, in particular to a cat-eye (door mirror), which comprises a casing, an objective lens, an eyepiece and a support mechanism in prior cat-eye, and is characterized in that the outside surface of the objective lens is coated with an optical unidirectional perspective film. The utility model has the advantages that: by using the unidirectional visual cat-eye, persons in the house can see outside things conveniently but those outside the housing can not see into housing from outside, so the utility model can enhance the safety or meet various demands of users; the utility model also retains the advantages of prior cat eye, such as simple structure, convenient manufacture and low cost.

Description

Security door one-way viewable opal

Technical field

The utility model relates to building safety equipment, is specifically related to the making of opal (peephole).

Background technology

On the present dwelling house gate, all be provided with opal usually, so that the people in the house can observe situation outdoors, thereby whether decision opens the door.Generally speaking, the people who is positioned at the house does not wish that people outdoors can see oneself, comprises that whether oneself is in movements such as observation open airs.But opal of the prior art can not be accomplished this point fully.Because present peephole opal is made up of about two corresponding lens.When light is secretly outside the room within doors, outside the room, cannot see within doors, but when light is brighter within doors, outside the room, still can see through opal and observe the active situation of people in the subregion within doors, this has brought certain potential safety hazard to the user.At this situation, CN200420062370.x provides a kind of safe opal that adopts the periscope form, effectively hidden owner's within doors activity.But this mode complex structure implements inconvenience, has also improved cost price simultaneously.So far do not find that other can overcome the safe opal of above-mentioned defective.

Summary of the invention

The purpose of this utility model is, at the deficiencies in the prior art, provides a kind of one-way viewable opal that can't observe within doors outside the room.

The purpose of this utility model is realized by following technical scheme.

Security door one-way viewable opal of the present utility model comprises shell, object lens, eyepiece and supporting mechanism thereof in the existing opal, it is characterized in that, is coated with optical-unidirectional (extroversion) perspective rete on the outer surface of described object lens.

One-way viewable opal of the present utility model, can be from observing the situation outside the room within doors easily, and outside the room, can't observe within doors situation, even when light is brighter within doors, can not outside the room, observe situation within doors, thereby help safety more, perhaps can satisfy the needs of some particular case; And, characteristics such as the technical program has still kept the simple in structure of existing opal, and is easy to make, with low cost.

The specific embodiment

Be further described below by drawings and Examples.

Fig. 1 is a kind of example structure schematic diagram of the present utility model.

Embodiment

Referring to Fig. 1, object lens 3 are concavees lens, and eyepiece 4 is convex lens, and both all place the endoporus of shell 1. Inner sleeve 2 usefulness With the location of object lens and eyepiece, scribble adhesive of the prior art at the periphery of eyepiece, make it can not move left and right. 5 Be clamp nut. Described these modular constructions and shape are all same as the prior art. Outer surface at object lens 3 plates Optical-unidirectional (extroversion) perspective rete 6 is arranged, and for example silverskin or aluminium film make described object lens 3 become optical-unidirectional (extroversion) Photoscope.

Claims

1. a security door one-way viewable opal comprises shell, object lens, eyepiece and supporting mechanism thereof in the existing opal, it is characterized in that, is coated with optical-unidirectional perspective rete on the outer surface of described object lens.