CN2144316Y

CN2144316Y - Safety lens

Info

Publication number: CN2144316Y
Application number: CN 93201526
Authority: CN
Inventors: 傅文忠; 王正尧
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-12
Filing date: 1993-01-12
Publication date: 1993-10-20
Anticipated expiration: 2003-01-12

Abstract

The utility model discloses a safety lens which combines the optics and the electronic warning. A light path which is composed of a prism, a pair of convex and transparent objective lenses, and a view screen is arranged in the lens seat and the prism seat to lead outdoor people to be formed into an image on the view screen. Because the integral light path is a set of light path in the positive direction, inverse viewing can not be allowed. So indoor people can see outdoor people clearly. But outdoor people can not peep at indoor scene. The arrangement of the electronic alarm device can emit alarm sound to remind indoor people of alertness after people stay in front of the door for a few seconds. The utility model has the advantages of novel design and structure, clear and vivid images, alters the defects that the previous images of a door mirror are not clear and greatly distort, and ensures the safety of family members and the safety of property.

Description

Safety lens

The utility model relates to the door safety device.

Along with expanding economy, the safety of family's property has been subjected to the attention of increasing urban and rural residents, and security personnel's consciousness is just progressively strengthened, therefore, demand to anti-theft protective device is increasing, require more and more highlyer, Safety lens is complied with this situation and need be designed, and it is to design on the basis of peephole image-forming principle, but the Safety lens of prior art has following defective: 1. imaging is unclear, distortion is big, can only simple eyely take aim at and look, and can not look squarely by binocular; 2. alarm free function.

The purpose of this utility model is to overcome the defective of prior art and provides that a kind of picture is clear, true to nature, the visual field big and have the Safety lens of infrared warning device to society.

Solution of the present utility model is the Safety lens of a kind of optics of design and electronic warning system combination, by microscope base, prism table, prism, the object lens that pair of parallel is relative, set up a screen of being separated by in the Safety lens of compositions such as light shield by lining and assembly circle, making outdoors, scenery can reflect clearly on indoor screen, simultaneously, distributing box is set below light shield, the infrared alarming control system is housed in the box, in the both sides of prism table pair of sensors and color filter are housed, two pins of sensor insert the alarm control system in the distributing box, are therefore stopping in front of the door as the people and are just sending chimes of doom more than the kind in several seconds.

The Safety lens that provides by the design, novel structure, it is the ingenious combination of finder and warning system, picture is clear, true to nature, changed the defective that the peephole imaging is unclear in the past, distortion is big, IR alarm system can improve indoor people's vigilance, thereby gets rid of some eventualities effectively so take place, and makes the safety of house person, property that guarantee all arranged.

Description of drawings.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the A of Fig. 1 is to view.

Fig. 3 is that the B of Fig. 1 is to view.

Fig. 4 is the alarm control system block scheme.

Fig. 5 is the alarm control system circuit theory diagrams.

Do following describing in further detail according to above-mentioned accompanying drawing embodiment.

The specific embodiment of Safety lens sees Fig. 1～5 for details, microscope base (2) is contained on the door, the internal thread of front end is connected with the prism table that is positioned at outer side of door (10), the external thread of rear end is connected with the light shield (3) of door inboard, it is outer by the flange intercalation that protecting cover (11) is sleeved on prism table (10), be in the flange hole of flange intercalation on door of protecting cover (11), and the flange intercalation of prism table (10) is in the flange hole of protecting cover (11), because being threaded of prism table (10) and microscope base (2), so being positioned at outdoors people and just can't rotating protecting cover (11) and prism table (10) and take off.Image rotation square glass prism (9) is housed in the prism table (10), and effect is that to make the picture that is imaged on the projection screen be erect image, is bonded with pad one deck black scraps of paper between two Tps, utilizes the total reflection of prism facets to reach the purpose of image rotation.The fixing of prism (9) finished by prism pressing plate (8), a pair of protruding object lens (7) are parallel by designed distance with screen (1), relatively be installed in the microscope base (2), be separated by with lining (5), screen (1) is a frosted glass, fixing by piecing together circle (4), outdoor personage is imaged on the screen (1), because whole optical system is one group of forward light path by object lens (7), can not contrary look, therefore indoor people can see outdoor people clearly and the scenery of outdoor people in can't peeping room.

Shadow shield (3) below is provided with distributing box (6), alarm control system is housed in the box, pair of sensors (13) and color filter (12) that the reception of light is equipped with by prism table (10) both sides are born, (13) emissions of sensor, one receives only, and two pins of sensor (13) insert the alarm control system in the distributing box (6).

Described alarm control system is made up of bistable switching circuit (21), pulse per second (PPS) generation circuit (22), oscillatory circuit (23), signal receiving circuit (24), rectification circuit (25), monostable circuit (26), delay circuit (27), vibration, promotion, warning circuit (28).

The principle of work of warning circuit is seen Figure 4 and 5, button (14) (ON), (16) (OFF) control circuit break-make.By gate circuit (31), (32) and R ₁, R ₂, R ₃, BG ₁, BG ₂Form a bistable state on-off circuit (21).The IHZ pulse square wave-generator by door (33), (34) and on every side electronic component form, produce the IHZ pulse signal, the oscillatory circuit (23) that this signal controlling is made up of gate circuit (35), (36), thus 1 second 40KHZ pulse signal at interval produced, again through BG ₃, BG ₄Amplify infrared transmitting tube D ₁, D ₂Just launch modulated infrared light.D ₄Be infrared signal receiving circuit (24), when in the certain distance man-hour being arranged outdoors, D ₄Receive enough strong infrared external reflection signal, the integrated circuit (IC) in rectification circuit (25) is amplified, D ₅, R ₁₃, C ₇Rectification produces pulse signal.Form a monostable circuit (26) by gate circuit (37), (38) and peripheral circuit, as long as gate circuit (27) input consecutive pulses signal, the output of gate circuit (28) just can keep noble potential.By gate circuit (39), (40), R ₁₇, C ₉Form a delay circuit (27).By gate circuit (11), (42) and R ₁₈, R ₁₉, C ₁₀Form an acoustic oscillations circuit (28), gate circuit (43), (44) are used to promote hummer BZ and send chimes of doom.

Entire circuit work is pressed switch (14) (ON), circuit turn-on, pilot lamp (15) (D by artificially control in the room ₈) bright, the human body infrared signal is received by sensor (13) outside the room, circuit is promptly reported to the police after time-delay, opens the door chimes of doom and promptly stops, and need stop as not opening door reporting to the police, press switch (16) (OFF) circuit be and end.

Claims

1, a kind of Safety lens, comprise the microscope base (2) that is contained on the door, the prism table (10) that is positioned at outer side of door is fixedlyed connected with microscope base (2), protecting cover (11) is sleeved on outside the prism table (10), in the seat prism (9) and prism pressing plate (8) are housed, pair of parallel object lens (7) relatively are installed in the microscope base (2), are separated by with lining (5) and assembly circle (4) between them, light shield (3) is located at an inboard and microscope base (2) is fixing, it is characterized in that:

A., the screen (1) parallel with object lens (7) also is housed in the microscope base (2);

B. distributing box (6) is located at light shield (3) below, and alarm control system is housed in the box;

C. pair of sensors (13) and color filter (12) are equipped with in prism table (10) both sides, and sensor (13) two pins insert the alarm control system in the distributing box (6).

2, Safety lens as claimed in claim 1 is characterized in that described alarm control system is made up of bistable switching circuit (21), pulse per second (PPS) generation circuit (22), oscillatory circuit (23), signal receiving circuit (24), rectification circuit (25), monostable circuit (26), delay circuit (27), vibration, promotion, warning circuit (28).

3, Safety lens as claimed in claim 1 is characterized in that protecting cover (11) and door have to prevent flange and flange hole structure in relative rotation.

4, Safety lens as claimed in claim 1 is characterized in that prism table (10) and protecting cover (11) have to prevent flange and flange hole structure in relative rotation.