CN2166468Y

CN2166468Y - Folding safety protective door mirror

Info

Publication number: CN2166468Y
Application number: CN 93215963
Authority: CN
Inventors: 王淑荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-10
Filing date: 1993-06-10
Publication date: 1994-05-25
Anticipated expiration: 2003-06-10

Abstract

The utility model relates to a roll over formula safety protection peephole, it is by the lens cone, the prism, constitute such as lens and screen, utilize the prism structure of reprinting, with external scenery image through prism group reprinting into the positive image, enlarge the back projection through lens on plano-concave screen, the image quality that it becomes is clear, the field of view scope is big, it is long to go out the pupil distance, adjustable field of view scope, the user need not to climb and can see bigger outdoor scenery projection image on the door, provide very big convenience for the user.

Description

Refracting safety protective mirror of door

The utility model relates to a kind of optical instrument, and particularly refracting security protection peephole belongs to a kind of peep sight glass.

In the past, it was the super hemisphere magnifying glass of " flake " formula that security peephole adopted more, limited by its Imaging Principle, the serious distortion of scenery image, and the emergent pupil distance is little, and the user must climb on door and observe.This kind peephole almost can't use the elderly of not positive eye disease patient of Qu Guang and the decline of focusing ability.

Structures such as the purpose of the present utility model is to provide a kind of refracting security protection peephole, and it has overcome the image dsitortion of common peephole scenery, and the emergent pupil distance is little are not enough and observe the shortcoming of using inconvenience.

Of the present utility model being contemplated that: utilize the inverting prism structure, extraneous scenery image after changing into just as the amplification of scioptics group, the prism group is projected on the plane of plano-concave lens, this plane is non-polished surface, the clear image that it became, field range is big, distance of exit pupil is long, can adjust field range.

Fig. 1 is the utility model structure principle chart.

Fig. 2 is the utility model optical schematic diagram.

The utility model is by lens barrel (1), prism table (2), prism (3), press door circle (4), lens (5), screen mirror (6), trim ring (7) and cover plate (8) etc. are formed (with reference to Fig. 1,2), wherein prism (3) is fixed in the prism table (2), prism table (2) and lens barrel (1) threaded engagement connect and lens (5) are positioned at the front portion of lens barrel (1), trim ring (7) connects with lens barrel (1) threaded engagement will shield the rear portion that mirror (6) is fixed on lens barrel (1), press door circle (4) to connect with its threaded engagement in the outside of lens barrel (1), prism table (2) front also studs with a rectangular bar of steel chemoprevention and protects glass (8), prevent that dust from dropping on that prism (3) is gone up or artificial finger touch physical shock cause prism to damage can't imaging, prism (3) is 90 ° of right-angle prisms, and lens (5) are positive falcate, and screen mirror (6) is a plano-concave lens.The utility model in use, extraneous scenery image changes into just as the scioptics enlarging projection on the r=of plano-concave lens ∞ face through prism, so the user need not to climb on door and observes, as long as in the human eye visual range, can observe the clear scenery that is projected on the screen mirror.

The utility model also can be provided with a power switch at the peephole direction of observation in implementation process, perhaps at outdoor employing induction control system, when the visiting guest walked close to, illuminator was opened, and making within doors, the people more clearly observes the person that has come.

Characteristics of the present utility model are simple in structure, field range is big, and distance of exit pupil is long, and the user need not to climb and can see bigger outdoors scenery projected image on door, give the user the particularly not positive eye disease patient of Qu Guang, the elderly of focusing ability decline provides convenience.

Claims

1, a kind of refracting security protection peephole, by lens barrel (1), lens (5), press door circle compositions such as (4), it is characterized in that prism table (2) in addition, prism (3), screen mirror (6), trim ring (7) etc., wherein prism (3) is fixed in the prism table (2), prism table (2) connects with lens barrel (1) threaded engagement, and lens (5) are positioned at the front portion of lens barrel (1), and trim ring (7) connects with lens barrel (1) threaded engagement will shield the rear portion that mirror (6) is fixed on lens barrel (1), press door circle (4) to connect with its threaded engagement in the outside of lens barrel (1), prism (3) is 90 degree right-angle prisms, and lens (5) are positive falcate, and screen mirror (6) is a plano-concave lens.

2, refracting security protection peephole according to claim 1 is characterized in that, prism table (2) front also studs with a rectangular bar of steel chemoprevention and protects glass (8).