CN211954449U

CN211954449U - Lens structure for indoor night lamp

Info

Publication number: CN211954449U
Application number: CN202020659554.3U
Authority: CN
Inventors: 黄小华; 王东民
Original assignee: Tianjin Aishi Kairui Technology Development Co Ltd
Current assignee: Tianjin Aishi Kairui Technology Development Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-11-17
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a lens structure for indoor night-light, which comprises a rectangular mirror body, wherein the rectangular mirror body comprises a central visual area positioned in the middle and two side visual areas positioned at two sides of the central visual area, and the central visual area is divided into an upper visual area, a middle visual area and a lower visual area; the two side visual areas comprise an upper area block and a lower area block on each side, the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of small area blocks, and the upper area block, the lower area block and each small area block are lens sheets with Fresnel lines and focus on the sensing position of a pyroelectric sensor of an indoor night lamp; the utility model discloses utilize fei nieer principle, to the application demand of night-light to environment detection, increased detection angle and sight area distance, and the trigger point that brings based on little block design is many, improves the infrared induction ability of night-light, realizes providing necessary hardware support to the human detection of all ring edge borders on a wider range for the night-light.

Description

Lens structure for indoor night lamp

Technical Field

The utility model belongs to the technical field of the optical accessories, especially relate to a plane lens structure for indoor night-light.

Background

With the development of modern technology, smart homes are applied more and more, such as night lights, and the intelligent home is automatically switched on and off by applying a passive infrared detection technology along with the approaching and the departing of a human body. The passive infrared detection technology used by the device needs two key elements, namely a pyroelectric infrared sensor PIR and a Fresnel lens; the pyroelectric infrared sensor (PIR) can convert infrared signal change into an electric signal and has an inhibiting effect on white light signals in nature, when no human body moves, the pyroelectric infrared sensor senses only background temperature, and when a human body enters a detection area, the pyroelectric infrared sensor senses a difference signal between the human body temperature and the background temperature through a Fresnel lens; the Fresnel lens has two functions, one is a focusing function, namely, the pyroelectric infrared signal is refracted (reflected) on the PIR, and the second function is to divide the inside of the warning area into a plurality of bright areas and dark areas, so that the moving object entering the warning area can generate a variable pyroelectric infrared signal on the PIR in the form of temperature change, and the PIR can generate a variable electric signal.

The lens structure of using at the night-light among the prior art is more single, and detection angle is little, and the visual area distance can not satisfy the function demand that the night-light surveyed indoor environment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a lens structure for indoor night-light has increased detection angle and visual area distance, realizes providing necessary hardware support to the human detection of all ring edge borders on a larger scale for the night-light.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a lens structure for an indoor night lamp comprises a rectangular mirror body, wherein the rectangular mirror body comprises a central visual area located in the middle and two side visual areas located on two sides of the central visual area, and the central visual area is divided into an upper visual area, a middle visual area and a lower visual area; the two side visual areas comprise an upper area block and a lower area block on each side, the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of small area blocks, and the upper area block, the lower area block and each small area block are lens sheets with Fresnel lines and focus on the sensing position of a pyroelectric sensor of an indoor night lamp;

the widths of the upper block and the lower block are smaller than the small blocks; the height of the lower zone is equal to the height of the lower layer visual area, and the height of the upper zone is equal to the sum of the heights of the upper layer visual area and the middle layer visual area.

Furthermore, the upper visual area corresponds to a far vision area, the small blocks of the upper visual area are arranged in parallel in a rectangular mode and have 20-degree optical included angles, the circle center of the concentric circle of the Fresnel line of each small block is located on the lower side, the circle center of the concentric circle of the Fresnel line of the small block located on the left edge is located on the left side, the circle center of the concentric circle of the Fresnel line of the small block located on the right edge is located on the right side, and the circle centers of the concentric circles of the Fresnel lines of the small blocks located between the left and the right are located on the vertical central line of the upper visual area.

Furthermore, the middle layer visual area corresponds to the middle viewing area, the small blocks of the middle layer visual area are arranged in parallel in a rectangular mode and have 20-degree optical included angles, the center of the concentric circle of the Fresnel line of each small block is located at the middle lower part, the center of the concentric circle of the Fresnel line of the small block located at the left edge is also located at the left side, the center of the concentric circle of the Fresnel line of the small block located at the right edge is also located at the right side, and the centers of the concentric circles of the Fresnel lines of the small blocks located between the left small block and the right small block are located on the vertical central line of the middle layer visual.

Furthermore, the lower visual area corresponds to a near-sighted area, the small blocks of the lower visual area are arranged in parallel in a rectangular mode and have an optical included angle of 15 degrees, the circle centers of the concentric circles of the Fresnel lines of the small blocks are arranged in a middle-upper mode, the circle centers of the concentric circles of the Fresnel lines of the small blocks at the left edge are arranged in a left-side mode, the circle centers of the concentric circles of the Fresnel lines of the small blocks at the right edge are arranged in a right-side mode, and the circle centers of the concentric circles of the Fresnel lines of the small blocks between the left-side visual area and the right-side.

Furthermore, the concentric circle center of the Fresnel lines of the upper area block and the concentric circle center of the Fresnel lines of the lower area block on the left side of the left side parts of the two side visual areas are deviated to the left lower part and the concentric circle center of the Fresnel lines of the lower area block is deviated to the left upper part; the concentric circle center of the upper block Fresnel lines on the right part is deviated from the lower right part, and the concentric circle center of the lower block Fresnel lines is deviated from the upper right part.

Further, the widths of the left and right edge small blocks of the upper layer visual area, the middle layer visual area and the lower layer visual area are larger than the widths of other small blocks contained in the upper layer visual area, the middle layer visual area and the lower layer visual area.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a fresnel principle is utilized to the ingenious night-light that utilizes of lens structure, to the application demand that the night-light surveyed the environment, has increased detection angle and visual area distance, and the trigger point that brings based on little block design is many, improves the infrared induction ability of night-light, realizes for the night-light that more extensive human detection to all ring edge borders provides necessary hardware support.

Drawings

Fig. 1 is a schematic view of a lens structure according to an embodiment of the present invention;

fig. 2 is a schematic view of a vertical detection region according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a horizontal detection area according to an embodiment of the present invention.

Wherein:

1. an upper viewing zone; 2. a middle layer viewing zone; 3. a lower viewing zone; 4. two side viewing zones.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be further explained with reference to the drawings and the embodiments.

The utility model discloses use on the night-light, the concrete environmental condition of using is as follows, and the detection position at the lens place that the night-light was installed is just to the human body, 1.5 meters height, ambient temperature 25, human walking speed 1 meter per second.

As shown in fig. 1, the utility model comprises a central visual area, in order to accurately grasp the area of the moving target, the central visual area is divided into an upper layer, a middle layer and a lower layer, a light and dark area is added, the vertical angle is controlled at 50-60 degrees, and meanwhile, the detection angles of two sides of the visual areas on two sides are designed on two sides of the central visual area;

the concrete description is as follows:

a, the upper viewing zone 1 corresponds to a far-viewing zone, and the optical angle of the zone is about 20 ° (as shown in fig. 2, the zone marked 1 is the far-viewing zone corresponding to the upper viewing zone 1);

the main human body signal of detection distance 3.5-5 meters of far-range district, the utility model discloses an upper strata visual area 1 is as shown in figure 1, divide into 4 rectangle little blocks, arrange side by side, have 20 optical included angles, 4 little blocks are all the lens sheet that is provided with the fresnel line, and all focus on the induction position of indoor night-light's pyroelectric sensor, the concentric circle centre of a circle position of the fresnel line of each little block is on the low side, the concentric circle centre of a circle of the fresnel line that is located left edge little block is on the left side simultaneously, the concentric circle centre of a circle of the fresnel line that is located right edge little block is on the right side simultaneously, the concentric circle centre of a circle of the fresnel line that is located 2 little blocks in the middle all is located self vertical center line; the width of the small blocks at the left edge and the right edge is greater than that of the small blocks at the middle 2; the upper visual area 1 is designed to mainly detect the height of a human body below 2 m and shield interference signals of an upper super-region.

b, the middle layer view area 2 corresponds to a middle view area, and the optical included angle of the area is about 20 degrees (as shown in fig. 2, the area marked 2 is the middle view area corresponding to the middle layer view area 2);

the middle visual area mainly detects 1.5-3.5 meters of human body signals, the utility model discloses a middle level visual area 2 is as shown in figure 1, divide into 4 rectangle little blocks, arrange side by side, have 20 optical included angles, 4 little blocks are all lens sheets provided with fresnel patterns, and all focus on the induction position of the pyroelectric sensor of indoor night-light, the concentric circle center position of fresnel patterns of each little block is lower than normal, the concentric circle center of fresnel patterns located in the left edge little block is still left at the same time, the concentric circle center of fresnel patterns located in the right edge little block is still right at the same time, the concentric circle center of fresnel patterns of 2 little blocks in the middle is located on the vertical central line of self; the width of the small blocks at the left edge and the right edge is greater than that of the small blocks at the middle 2; the design structure of the middle layer view area 2 is to reduce other interference in unknown directions after forming a detection area inclining downwards, and trigger points formed by 4 small blocks are enough for capturing middle distance signals.

c, the lower visual area 3 corresponds to a near vision area, and the optical included angle of the area is about 15 degrees (as the area marked 3 in fig. 2 is the near vision area corresponding to the lower visual area 3);

the myopia zone mainly detects human body signals of 0.5-1.5 meters, the lower-layer visual area 3 is divided into 4 small blocks which are arranged in parallel and have 15-degree optical included angles as shown in figure 1, the 4 small blocks are lens sheets provided with Fresnel lines and focus on the induction positions of the pyroelectric sensors of the indoor night lamps, the concentric circle centers of the Fresnel lines of the small blocks are in the middle, the concentric circle centers of the Fresnel lines of the small blocks at the left edge are on the left side at the same time, the concentric circle centers of the Fresnel lines of the small blocks at the right edge are on the right side at the same time, and the concentric circle centers of the Fresnel lines of the small blocks at the middle are on the vertical central line of the Fresnel lines of the small blocks at the middle; the width of the small blocks at the left edge and the right edge is greater than that of the small blocks at the middle 2; the structural design of the lower-layer visual area 3 is convenient for the plane lens to capture a near target downwards, the performance is excellent, and the trigger point formed by 4 small blocks is enough for signal capture at a short distance.

d, the two side visual areas 4 are mainly detection visual areas in the two extended side directions, heat sources on two sides are relatively weak in aggregation due to the self short plate characteristics of the PIR pyroelectric sensor, and the angle and the distance are difficult to meet design requirements, so that the two side visual areas 4 are designed, each side of the two side visual areas 4 comprises an upper block and a lower block, the concentric circle center of the Fresnel lines of the upper blocks on the left side part of the two side visual areas 4 is lower to the left, and the concentric circle center of the Fresnel lines of the lower blocks is upper to the left; the center of the concentric circle of the Fresnel lines of the upper block at the right part is deviated to the right lower part, and the center of the concentric circle of the Fresnel lines of the lower block is deviated to the right upper part; the widths of the upper block and the lower block are smaller than the small blocks; the height of the lower zone is equal to the height of the lower layer visual area, and the height of the upper zone is equal to the sum of the heights of the upper layer visual area and the middle layer visual area. The two-sided viewing zone 4 is designed to expand the detection angle on both sides of the lens, and can be seen in detail in the two-sided sensing zone shown in FIG. 3.

As shown in FIG. 2, the vertical angle of the present embodiment is controlled to be 50-60 degrees, and the upper, middle and lower layers of lenses form a vertical detection angle; as shown in fig. 3, the two side viewing zones and the central viewing zone divided into 4 small zones in each layer form 6 adjacent visual zones in the transverse direction, and the maximum angle of the left and right detecting viewing zones is up to 100 degrees; the utility model discloses a planar lens design, the structure needs of perfect adaptation night-light infrared induction.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens structure for an indoor night lamp comprises a rectangular mirror body, wherein the rectangular mirror body comprises a central visual area located in the middle and two side visual areas located on two sides of the central visual area, and the central visual area is divided into an upper visual area, a middle visual area and a lower visual area; the two side visual areas comprise an upper area block and a lower area block on each side, the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of small area blocks, and the upper area block, the lower area block and each small area block are lens sheets with Fresnel lines and focus on the induction positions of the pyroelectric sensors of the indoor night lamps;

2. The lens structure for indoor night light of claim 1, wherein the upper layer visual area corresponds to a far vision area, the small blocks in the upper layer visual area are arranged in parallel in a rectangular shape and have an optical included angle of 20 degrees, the circle centers of the Fresnel lines of the small blocks are located at lower positions, the circle centers of the Fresnel lines of the small blocks at the left edge are also located at left positions, the circle centers of the Fresnel lines of the small blocks at the right edge are also located at right positions, and the circle centers of the Fresnel lines of the small blocks between the left and right positions are located on a vertical center line of the lens structure.

3. The lens structure for indoor night light as claimed in claim 1, wherein the middle layer view zone corresponds to the middle viewing zone, the small blocks in the middle layer view zone are arranged in parallel in a rectangular shape and have 20 ° optical included angles, and the concentric circle centers of the fresnel patterns of the small blocks are arranged in a center-to-center manner, the concentric circle centers of the fresnel patterns of the small blocks at the left edge are also arranged in a left-to-right manner, the concentric circle centers of the fresnel patterns of the small blocks at the right edge are also arranged in a right-to-right manner, and the concentric circle centers of the fresnel patterns of the small blocks between the small blocks are all arranged on the vertical center line of the lens structure.

4. The lens structure for indoor night light of claim 1, wherein the lower visual area corresponds to a near-sighted region, each small block of the lower visual area is arranged in parallel in a rectangular manner and has an optical included angle of 15 degrees, the center of a concentric circle of Fresnel lines of each small block is middle in a bias manner, the center of a concentric circle of Fresnel lines of the small block at the left edge is also left in a bias manner, the center of a concentric circle of Fresnel lines of the small block at the right edge is also right in a bias manner, and the centers of concentric circles of Fresnel lines of all small blocks between the left edge and the right edge are all located on a vertical center line of the lens structure.

5. The lens structure of claim 1, wherein the concentric circle center of the fresnel pattern of the upper section is left lower and the concentric circle center of the fresnel pattern of the lower section is left upper in the left side of the two side viewing zones; the concentric circle center of the upper block Fresnel lines on the right part is deviated from the lower right part, and the concentric circle center of the lower block Fresnel lines is deviated from the upper right part.

6. The lens structure of an indoor night light as claimed in claim 1, wherein the width of each of the left and right edge small areas of the upper viewing zone, the middle viewing zone and the lower viewing zone is larger than the width of each of the other small areas.