Double-PIR lens structure applied to doorbell

Abstract

The utility model belongs to the technical field of smart home, and discloses a double-PIR lens structure applied to a doorbell, which comprises a lens main body and two lens body parts, the two ends of the lens main body are respectively provided with an arc-shaped bending part, the two lens body parts are arranged on the left side and the right side of the lens main body, and the two arc-shaped bending parts are arranged on the lens main body. One end of each lens body part, which is far away from the center of the lens main body, is arranged on the corresponding arc-shaped bending part, one lens body part is focused on the sensing position of one PIR sensor of the doorbell, and the other lens body part is focused on the sensing position of the other PIR sensor of the doorbell. The left and right detection angles can reach 180 degrees, the upper and lower detection angles are 55 degrees, the detection range is greatly expanded, the two mirror body parts are symmetrically distributed and accurately matched with the double-PIR sensor layout of the doorbell, left and right partition independent focusing is achieved, detection blind areas are avoided, and the sensing ability of the doorbell to people approaching in different directions is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of smart home technology, and in particular to a dual PIR lens structure used in doorbells. Background Technology

[0002] Existing doorbell lens structures have certain limitations in terms of detection angle and viewing area, making it difficult to achieve accurate detection over large angles and viewing areas. This results in poor doorbell sensing performance and may lead to missed or false detections, failing to meet users' demands for high reliability in doorbells.

[0003] Therefore, a double PIR lens structure for use in doorbells is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a dual PIR lens structure for use in doorbells, thereby solving or at least alleviating one or more of the aforementioned problems and other issues existing in the prior art.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A dual PIR lens structure for use in a doorbell includes a lens body and a mirror portion. Both ends of the lens body are provided with arc-shaped bends. There are two mirror portions, which are located on the left and right sides of the lens body. The end of the mirror portion away from the center of the lens body is located on the arc-shaped bend. One mirror portion focuses on the sensing position of one of the PIR sensors of the doorbell, and the other mirror portion focuses on the sensing position of the other PIR sensor of the doorbell.

[0007] According to the present invention, a double PIR lens structure for use in a doorbell is provided, wherein the lens body is divided into a first viewing area, a second viewing area, a third viewing area, and a fourth viewing area from top to bottom. Each of the first, second, third, and fourth viewing areas is composed of several Fresnel patterned lenses, and all Fresnel patterned lenses belonging to the same lens body are focused on the same center.

[0008] According to the present invention, a dual PIR lens structure for use in a doorbell is provided, wherein the first, second, third and fourth viewing areas are each provided with a lens sheet with six rows of Fresnel patterns, and the Fresnel pattern lens sheet located away from the center of the lens body is provided on the arc-shaped bend.

[0009] According to the present invention, a dual PIR lens structure for use in a doorbell is provided, wherein the two lens portions are symmetrically distributed about the central axis of the lens body.

[0010] In a dual PIR lens structure for use in a doorbell according to the present invention, the focal center of the Fresnel pattern lens in the leftmost layer is offset to the left by 0.5mm-2mm, and the offset angle is 5°-15°; the focal center of the Fresnel pattern lens in the rightmost layer is offset to the right by 0.5-2mm, and the offset angle is 5°-15°.

[0011] According to the present invention, a dual PIR lens structure is used in a doorbell, wherein the lens structure has a left-right detection angle of 180° and a right-down detection angle of 55°.

[0012] This utility model has at least the following beneficial effects:

[0013] By combining the curved bends at both ends of the lens body with the two mirror sections, the left and right detection angle can reach 180°, and the up and down detection angle is 55°, which greatly expands the detection range. The two mirror sections are symmetrically distributed and precisely match the doorbell's dual PIR sensor layout, achieving independent focusing in the left and right zones. This accurately guides the human infrared signal to the sensor, effectively improving the doorbell's ability to sense people approaching from different directions. The one-to-one correspondence between the dual mirror sections and the dual PIR sensors avoids the detection blind spots of a single PIR system. Through the complementarity of the left and right sensor signals, the sensing reliability is further improved. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0017] Figure 3 This is a top view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the right-side structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the viewing area of ​​the lens body of this utility model in the side view and top view areas;

[0020] Figure 6 This is a schematic diagram of the lens texture of this utility model.

[0021] Explanation of icon numbers:

[0022] 1. Lens body; 101. Snap fastener; 102. Beveled cut; 103. Arc-shaped bend; 2. Lens body; 201. First-layer viewing area; 202. Second-layer viewing area; 203. Third-layer viewing area; 204. Fourth-layer viewing area. Detailed Implementation

[0023] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Please refer to Figures 1 to 6 As shown in the embodiments of this utility model,

[0025] A dual PIR lens structure for use in a doorbell includes a lens body 1 and a lens portion 2. Both ends of the lens body 1 are provided with arc-shaped bending portions 103. There are two lens portions 2, which are located on the left and right sides of the lens body 1. The end of the lens portion 2 away from the center of the lens body 1 is located on the arc-shaped bending portion 103. One lens portion 2 focuses on the sensing position of one of the PIR sensors of the doorbell, and the other lens portion 2 focuses on the sensing position of the other PIR sensor of the doorbell.

[0026] The lens body 1 serves as the basic support structure, with arc-shaped bends 103 at both ends to extend the lateral detection range. Two mirror bodies 2 are symmetrically positioned on both sides, focusing the human infrared signal onto the corresponding PIR sensor, achieving left and right zone detection. The arc-shaped bends 103 increase the edge light refraction angle, effectively expanding the horizontal detection angle to 180°.

[0027] In this embodiment, the lens body 2 is divided into a first-layer viewing area 201, a second-layer viewing area 202, a third-layer viewing area 203, and a fourth-layer viewing area 204 from top to bottom. The first-layer viewing area 201, the second-layer viewing area 202, the third-layer viewing area 203, and the fourth-layer viewing area 204 are all composed of several Fresnel pattern lenses. All Fresnel pattern lenses belonging to the same lens body 2 are focused on the same center.

[0028] The four viewing zones of the mirror body 2 focus infrared signals of the human body at different heights onto the same sensing position of the PIR through Fresnel lenses. For example, the first viewing zone 201 focuses the infrared signal of a nearby low-lying object such as a pet, while the fourth viewing zone 204 focuses the infrared signal of a distant high-lying object such as a standing person, forming a vertically layered detection.

[0029] In this embodiment, the first viewing area 201, the second viewing area 202, the third viewing area 203 and the fourth viewing area 204 are all provided with lenses with six rows of Fresnel patterns. The Fresnel pattern lens located away from the center of the lens body 1 is provided on the arc-shaped bending portion 103.

[0030] Each row of lenses is responsible for focusing infrared signals within a specific angular range. The edge lenses located on the curved bend 103, through their curved design, refract light incident at large angles to the PIR, expanding the horizontal detection range. For example, the outermost lens can focus lateral light at nearly 90° onto the sensor, achieving 180° full coverage in conjunction with the other side of the mirror body.

[0031] In this embodiment, the two mirror parts 2 are symmetrically distributed about the central axis of the lens body 1.

[0032] The symmetrical design ensures uniform detection range on both sides, avoiding blind spots on one side. When a person enters the detection area from the left, the lens of the left mirror section 2 focuses the signal onto the corresponding PIR; when entering from the right, the right mirror section 2 operates, achieving seamless detection.

[0033] In this embodiment, the focal length center of the lens in each Fresnel pattern layer on the left is shifted to the left by 0.5mm-2mm, and the shift angle is 5°-15°. The focal length center of the lens in each Fresnel pattern layer on the right is shifted to the right by 0.5-2mm, and the shift angle is 5°-15°.

[0034] The focal length center offset design creates a "fan-shaped" focusing area for the lenses. For example, shifting the left lens to the left allows for more precise focusing of obliquely incident light rays onto the PIR, enhancing signal strength in edge regions. The synergistic effect of the offset angle and distance optimizes light-gathering efficiency during large-angle detection, reducing signal loss.

[0035] In this embodiment, the lens structure has a left-right detection angle of 180° and a right-down detection angle of 55°.

[0036] The 180° left and right detection is achieved by the horizontal expansion of the two mirror sections 2, while the arc-shaped bend section 103 and focal length shift further enhance the edge detection capability. The 55° up and down detection is achieved through the vertical distribution of the first-level viewing area 201, the second-level viewing area 202, the third-level viewing area 203, and the fourth-level viewing area 204, forming a three-dimensional detection space.

[0037] In this embodiment, a buckle 101 is formed at the edge of the lens body 1.

[0038] Clip 101 is used for quick assembly of the lens body 1 and the doorbell housing. The 2-4mm engagement depth ensures a secure connection and prevents the lens from loosening and causing the detection angle to shift.

[0039] In this embodiment, the bottom of the lens body 1 is provided with a beveled cut 102. The angle of the beveled cut 102 matches the curvature of the bottom of the doorbell housing, allowing the lens body 1 to fit perfectly against the housing. This design eliminates assembly gaps and prevents external light from seeping in from the bottom and interfering with the PIR.

[0040] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the present invention's conception through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A dual PIR lens structure for use in doorbells, characterized in that, The device includes a lens body (1) and a mirror body (2). Both ends of the lens body (1) are provided with arc-shaped bending portions (103). There are two mirror bodies (2), which are located on the left and right sides of the lens body (1). One end of the mirror body (2) away from the center of the lens body (1) is located on the arc-shaped bending portion (103). One mirror body (2) focuses on the sensing position of one of the PIR sensors of the doorbell, and the other mirror body (2) focuses on the sensing position of the other PIR sensor of the doorbell.

2. The dual PIR lens structure for use in a doorbell according to claim 1, characterized in that: The lens body (2) is divided into a first viewing area (201), a second viewing area (202), a third viewing area (203), and a fourth viewing area (204) from top to bottom. Each of the first viewing area (201), the second viewing area (202), the third viewing area (203), and the fourth viewing area (204) is composed of several Fresnel pattern lenses. All Fresnel pattern lenses belonging to the same lens body (2) are focused on the same center.

3. The dual PIR lens structure for use in a doorbell according to claim 2, characterized in that: The first-layer viewing area (201), the second-layer viewing area (202), the third-layer viewing area (203), and the fourth-layer viewing area (204) are all provided with lenses with six rows of Fresnel patterns. The Fresnel pattern lenses located away from the center of the lens body (1) are provided on the arc-shaped bend (103).

4. The dual PIR lens structure for use in a doorbell according to claim 3, characterized in that: The two lens bodies (2) are symmetrically distributed about the central axis of the lens body (1).

5. The dual PIR lens structure for use in a doorbell according to claim 4, characterized in that: The focal length center of the Fresnel pattern lenses in the left-hand layers is shifted to the left by 0.5mm-2mm, and the shift angle is 5°-15°. The focal length center of the Fresnel pattern lenses in the right-hand layers is shifted to the right by 0.5-2mm, and the shift angle is 5°-15°.

6. The dual PIR lens structure for use in a doorbell according to claim 5, characterized in that: The lens structure has a left-right detection angle of 180° and a right-down detection angle of 55°.

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