CN217156849U - Lens structure for intelligent doorbell - Google Patents
Lens structure for intelligent doorbell Download PDFInfo
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- CN217156849U CN217156849U CN202221116816.7U CN202221116816U CN217156849U CN 217156849 U CN217156849 U CN 217156849U CN 202221116816 U CN202221116816 U CN 202221116816U CN 217156849 U CN217156849 U CN 217156849U
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Abstract
The utility model provides a lens structure for an intelligent doorbell, which comprises a circular mirror body, wherein the circular mirror body is divided into an upper visual area, a middle visual area and a lower visual area; the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of small blocks, and the small blocks are lens sheets provided with Fresnel grains and are focused on the induction position of a pyroelectric sensor of the intelligent doorbell; the top surface of the middle layer visual area is a concave curved surface, the bottom surface of the upper layer visual area is a convex curved surface matched with the concave curved surface, and the convex curved surface is embedded in the concave curved surface. The utility model provides an ingenious fresnel principle that utilizes of lens structure to intelligent doorbell's application demand, all obtains the increase at the detection angle and the visual area scope that look sideways at the region and overlook, controls detection angle and can reach 130 degrees, provides necessary hardware support for satisfying intelligent doorbell to the demand that all ring edge borders surveyed.
Description
Technical Field
The utility model belongs to the technical field of the optical accessories, especially, relate to a lens structure for intelligent doorbell.
Background
The intelligent doorbell has more and more extensive application in life and more perfect functional design, wherein one important function is infrared induction for human body movement, a passive infrared detection technology is applied to the function, and the passive infrared detection technology 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.
In the prior art, there have been "application number 202020659553.9, a lens structure for intelligent doorbell" patent, the mirror body divide into three visual areas about last, middle and middle layer visual area, and the upper strata and middle layer visual area correspond the face and be the horizontal plane, and this lens exists the detection blind area great, detection angle is little, the visual area scope is little scheduling problem between upper strata and middle layer visual area, can not satisfy the demand of intelligent camera to the human detection function of peripheral environment very well.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a lens structure for intelligent doorbell, through the optical design of the partition overall arrangement cooperation focus of lens, increase lens detection response scope reduces and surveys the blind area to satisfy intelligent doorbell and survey the demand to all ring edge borders.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a lens structure for an intelligent doorbell comprises a circular lens body, wherein the circular lens body is divided into an upper visual area, a middle visual area and a lower visual area; the upper layer visual area, the middle layer visual area and the lower layer visual area respectively comprise a plurality of small blocks, and the small blocks are lens sheets provided with Fresnel lines and are focused on the sensing position of a pyroelectric sensor of the intelligent doorbell;
the top surface of the middle layer visual area is a concave curved surface, and the bottom surface of the upper layer visual area is a convex curved surface matched with the concave curved surface.
Furthermore, the small blocks of the upper-layer visual area are arranged in parallel, an optical included angle of 65 degrees is formed, the concentric circle center of the Fresnel line of the small block at the left edge is located on the left lower side, the concentric circle center of the Fresnel line of the small block at the right edge is located on the right lower side, and the concentric circle centers of the Fresnel lines of the other small blocks located between the left small block and the right small block are located on the vertical central line of the upper-layer visual area.
Furthermore, the number of the middle-layer visual area small blocks is 2n, n is a natural number more than or equal to 2, the 2n small blocks are arranged in parallel below the upper-layer visual area and have an optical included angle of 130 degrees, the circle centers of the concentric circles of the Fresnel lines of the small blocks on the left side of the middle-layer visual area are all located on the left side of the vertical center line of the small blocks, and the circle centers of the concentric circles of the Fresnel lines of the small blocks on the right side of the middle-layer visual area are all located on the right side of the vertical center line of the small blocks.
Furthermore, the centers of the concentric circles of the Fresnel lines of the two small blocks at the left edge and the right edge of the middle layer visual area are equal in height, and the centers of the concentric circles of the Fresnel lines of the middle small block are equal in height and higher than the centers of the concentric circles of the Fresnel lines of the two small blocks at the left edge and the right edge.
Furthermore, each small block of the lower-layer visual area is arranged in parallel below the middle-layer visual area and has an optical included angle of 65 degrees, the circle center of the concentric circle of the Fresnel line of the small block at the left edge is positioned at the position which is slightly lower left outside the lower-layer visual area, the circle center of the concentric circle of the Fresnel line of the small block at the right edge is positioned at the position which is slightly lower right outside the lower-layer visual area, and the circle centers of the concentric circles of the Fresnel line of the small blocks between the other small blocks are positioned on the vertical central line of the circle center and are higher than the circle centers of the concentric circles of the small blocks at the left edge and the right edge.
Furthermore, the centers of the concentric circles of the Fresnel lines of the small blocks at the left edge and the right edge of the lower-layer visual area are equal in height.
Furthermore, the widths of the left and right edge small blocks of the upper layer visual area and the lower layer visual area are smaller than the widths of other small blocks contained in the upper layer visual area and the lower layer visual area, and the small blocks of the middle layer visual area are arranged in an equal width mode.
Compared with the prior art, a lens structure for intelligent doorbell have following advantage:
the utility model provides a fresnel principle is utilized to lens structure ingenious, left side in the circular mirror body, the concentric circles centre of a circle of the fresnel line of right edge department nubble all is located the perpendicular center line outside of self, survey angle improves 130 jiaos about will, surpass like product survey angle and visual area scope, the corresponding surface of upper visual area and lower floor's visual area is convex curved surface down simultaneously, survey blind area between upper visual area and the lower floor's visual area has been reduced, can satisfy intelligent doorbell to all ring edge borders detection demand.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a schematic structural diagram of a lens for an intelligent doorbell according to an embodiment of the present invention;
fig. 2 is a schematic view of a lens structure according to an embodiment of the present invention in a side view region and a top view region.
Description of reference numerals:
1-upper view zone; 2-middle view zone; 3-lower viewing zone.
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 understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
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 described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The utility model discloses be applied to intelligent doorbell, its vertical setting is on intelligent doorbell's main panel, and the front of lens is outwards put and is surveyed the environment, and the back then focuses on heat release sensor, constitutes infrared detection jointly, the utility model discloses the environment of using does: the detection position of the lens is 1.5 m high, the inclination angle is 0 degrees, the ambient temperature is 25 degrees, and the human body walks about 1 m/s.
As shown in fig. 1, the utility model has a circular mirror body, which is divided into an upper, a middle and a lower three viewing areas, wherein the upper viewing area is a far viewing area, and the lower viewing area is a near viewing area, which is specified as follows:
a, the upper layer VIEW region 1 corresponds to a far VIEW region (as shown in fig. 2, the region marked with 1 is the region corresponding to the upper layer VIEW region), and the main function of the upper layer VIEW region 1 in the lens structure is leakage compensation, so that detection omission of other VIEW regions caused by problems of human body positions or angles is avoided.
The upper layer visual area 1 is divided into 3 small blocks which are arranged in parallel, an optical included angle of 65 degrees is formed, and the width of the middle small block is larger than that of the left and right edge small blocks. The 3 small blocks are all lens sheets provided with Fresnel grains and focus on the induction positions of the pyroelectric sensors of the intelligent doorbell. The center of the concentric circle of the Fresnel line positioned in the small block at the left edge is eccentric to the left lower part, the center of the concentric circle of the Fresnel line positioned in the small block at the right edge is eccentric to the right lower part, and the center of the concentric circle of the Fresnel line positioned in the small block at the middle is positioned on the vertical central line of the concentric circle.
b, the middle layer VIEW region 2 corresponds to the middle VIEW region (as shown in Side VIEW of fig. 2, the region labeled 2 is the region corresponding to the middle layer VIEW region):
the high human signal of 2-5 meters is mainly surveyed to well visual area, the utility model discloses a middle level visual area includes 2n little blocks, and 4 little blocks are used as the example to explain to this embodiment, and 4 little block widths equal, and arrange side by side, have 130 optical included angles, and 4 little blocks are all for the lens sheet that is provided with the fresnel line, and all focus on the induction position of intelligent doorbell's pyroelectric sensor. The circle centers of the concentric circles of the Fresnel lines of the 2 small blocks on the left side are all located on the left side of the vertical center line of the concentric circles, the circle centers of the concentric circles of the Fresnel lines of the 2 small blocks on the right side are all located on the right side of the vertical center line of the concentric circles, the centers of the concentric circles of the Fresnel lines of the two small blocks on the left edge and the right edge are equal in height, the centers of the concentric circles of the Fresnel lines of the two small blocks in the middle are equal in height, and the centers of the concentric circles of the Fresnel lines of the two small blocks on the left edge and the right edge are slightly higher than the centers of the concentric circles of the Fresnel lines of the two small blocks on the left edge and the right edge. The structure enables the focal point of the PIR to be lower, and aims to increase the area of an upward detection area of the middle view area.
The utility model discloses in, well sight district top surface is recessed curved surface, goes up the visual area bottom surface and is lower convex curved surface, and recessed curved surface is corresponding with lower convex curved surface. The structure reduces the detection blind area between the upper visual area and the middle visual area, namely, the detection range of the middle visual area is increased, as shown in the Side VIEW in fig. 2, the position relation of the area marked with 2 and the area marked with 1 is shown. The left and right detection angle ranges of 4 small blocks in the middle layer VIEW area are shown in Top VIEW of fig. 2, and the left and right detection angles of 4 small blocks in the middle layer VIEW area can reach 130 degrees, which exceeds the detection angles and the VIEW range of similar products.
c, the lower viewing zone 3 corresponds to the near vision zone (as shown in fig. 2, Side VIEW shows, the region marked with 3 is the region corresponding to the lower viewing zone):
the lower-layer visual area 3 mainly detects human body signals with the height of 0.5-2m and is divided into 3 small blocks, the width of the middle small block is larger than that of the left edge small block and the right edge small block, the 3 small blocks are arranged in parallel and have 65-degree optical included angles, and the 3 small blocks are lens sheets provided with Fresnel lines and focus on the induction positions of the pyroelectric sensor of the intelligent doorbell. The circle center of the concentric circle of the Fresnel line positioned in the small block at the left edge is positioned at the position of the lower left side of the outer side of the lower layer visual area 3, the circle center of the concentric circle of the Fresnel line positioned in the small block at the right edge is positioned at the position of the lower right side of the outer side of the lower layer visual area 3, and the circle center of the concentric circle of the Fresnel line positioned in the small block at the middle is positioned on the vertical central line of the circle center and is higher than the circle centers of the concentric circles of the small blocks at the left edge and the right edge. The design is to realize that the lens downwards captures a near target, the horizontal detection range is enlarged, and the detection performance is superior to that of the similar products.
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 (7)
1. The utility model provides a lens structure for intelligent doorbell which characterized in that: the round mirror body is divided into an upper visual area (1), a middle visual area (2) and a lower visual area (3); the upper-layer visual area (1), the middle-layer visual area (2) and the lower-layer visual area (3) respectively comprise a plurality of small blocks, and the small blocks are lens sheets with Fresnel lines and are focused at the sensing positions of the pyroelectric sensors of the intelligent doorbell;
the top surface of the middle layer visual area (2) is a concave curved surface, and the bottom surface of the upper layer visual area (1) is a convex curved surface matched with the concave curved surface.
2. A lens structure for intelligent doorbells according to claim 1, characterized in that: the upper-layer visual area (1) is characterized in that the small blocks are arranged in parallel, the optical included angle is 65 degrees, the centers of the concentric circles of the Fresnel lines of the small blocks at the left edge are arranged on the left lower side, the centers of the concentric circles of the Fresnel lines of the small blocks at the right edge are arranged on the right lower side, and the centers of the concentric circles of the Fresnel lines of the small blocks between the left block and the right block are arranged on the vertical central line of the upper-layer visual area.
3. A lens structure for intelligent doorbells according to claim 1, characterized in that: the number of the small blocks of the middle-layer visual area (2) is 2n, n is a natural number more than or equal to 2, the 2n small blocks are arranged in parallel below the upper-layer visual area (1) and have an optical included angle of 130 degrees, the circle centers of the concentric circles of the Fresnel lines of the small blocks on the left side of the middle-layer visual area (2) are all located on the left side of the vertical center line of the small blocks, and the circle centers of the concentric circles of the Fresnel lines of the small blocks on the right side of the middle-layer visual area (2) are all located on the right side of the vertical center line of the small blocks.
4. A lens structure for intelligent doorbells according to claim 3, characterized in that: the centers of the concentric circles of the Fresnel lines of the two small blocks at the left edge and the right edge of the middle layer visual area (2) are equal in height, and the centers of the concentric circles of the Fresnel lines of the middle small block are equal in height and higher than the centers of the concentric circles of the Fresnel lines of the two small blocks at the left edge and the right edge.
5. A lens structure for intelligent doorbells according to claim 1, characterized in that: the Fresnel patterns of the small blocks located at the left edge are arranged on the left lower side of the outer side of the lower layer visual area (3), the Fresnel patterns of the small blocks located at the right edge are arranged on the right lower side of the outer side of the lower layer visual area (3), and the other Fresnel patterns of the small blocks located between the two concentric circle centers are located on the vertical central line of the Fresnel patterns.
6. The lens structure for intelligent doorbells according to claim 5, characterized in that: the centers of concentric circles of Fresnel lines of small blocks at the left edge and the right edge of the lower visual area (3) are equal in height.
7. A lens structure for intelligent doorbells according to claim 1, characterized in that: the widths of the small blocks at the left edge and the right edge of each of the upper visual area (1) and the lower visual area (3) are smaller than the widths of other small blocks contained in each of the upper visual area and the lower visual area, and the small blocks of the middle visual area (2) are arranged in an equal-width mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116816.7U CN217156849U (en) | 2022-04-29 | 2022-04-29 | Lens structure for intelligent doorbell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116816.7U CN217156849U (en) | 2022-04-29 | 2022-04-29 | Lens structure for intelligent doorbell |
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| Publication Number | Publication Date |
|---|---|
| CN217156849U true CN217156849U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221116816.7U Active CN217156849U (en) | 2022-04-29 | 2022-04-29 | Lens structure for intelligent doorbell |
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| Country | Link |
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| CN (1) | CN217156849U (en) |
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- 2022-04-29 CN CN202221116816.7U patent/CN217156849U/en active Active
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