Photosensitive device and surveillance camera

Abstract

The application relates to the technical field of light-sensing devices, and discloses a light-sensing device and a monitoring camera, the light-sensing device comprising: a shell, the shell being provided with a sensing window; a lens, the lens being arranged at the sensing window; a first PIR sensor and a second PIR sensor, the first PIR sensor and the second PIR sensor being arranged on the inner side of the lens; and a baffle, the baffle being arranged on the inner side of the lens and at least partially located between the first PIR sensor and the second PIR sensor to separate the first PIR sensor and the second PIR sensor. In the manner, on the basis of realizing a wide detection range through cooperation of multiple PIR sensors, the heat insulation capacity between the PIR sensors can be ensured, and mutual interference can be prevented.

Description

Technical Field

[0001] This application relates to the field of photosensitive equipment technology, specifically to a photosensitive device and a surveillance camera. Background Technology

[0002] With the development of technology, photosensitive devices are being widely used in more and more scenarios, such as camera equipment, smart homes, and smart appliances. Taking surveillance cameras as an example, in some application scenarios, surveillance cameras are equipped with light sensors to achieve functions such as target tracking, key frame saving, and alarms through sensor triggering.

[0003] Most sensors in surveillance cameras use a single passive infrared sensor (PIR sensor) to detect the thermal radiation emitted by a human or animal and trigger the sensor when the infrared heat source moves.

[0004] A single PIR sensor has a limited detection range. Therefore, how to enable multiple PIR sensors to reliably cooperate with each other to expand the detection range has become an urgent problem to be solved. Utility Model Content

[0005] In view of the above problems, embodiments of this application provide a photosensitive device and a surveillance camera that can achieve a wider detection range by cooperating with multiple PIR sensors, while ensuring the heat insulation capability between PIR sensors and preventing mutual interference.

[0006] According to one aspect of the embodiments of this application, a photosensitive device is provided, comprising: a housing having a sensing window thereon; a lens disposed at the sensing window; a first PIR sensor and a second PIR sensor disposed inside the lens; and a baffle disposed inside the lens and at least partially located between the first PIR sensor and the second PIR sensor to separate the first PIR sensor and the second PIR sensor.

[0007] In one alternative approach, the baffle rests against the inner wall of the lens.

[0008] In one alternative embodiment, the baffle includes a first plate; the first plate is disposed in front of the first PIR sensor and the second PIR sensor, and a first through hole and a second through hole are spaced apart on the first plate, the first PIR sensor extending into the first through hole and the second PIR sensor extending into the second through hole.

[0009] In one alternative embodiment, the baffle further includes a second plate disposed on the front side of the first plate and located between the first through hole and the second through hole, the front side of the second plate abutting against the lens, and the second plate being configured to partially separate the detection areas of the first PIR sensor and the second PIR sensor.

[0010] In one alternative embodiment, the sensing window is located on the front side of the housing along a first direction, and the fields of view of the first PIR sensor and the second PIR sensor overlap; the lens is divided into a first focusing area and a second focusing area along a second direction, wherein the second direction is perpendicular to the first direction; the first focusing area and the second focusing area each have a separate focal point, the first PIR sensor is set corresponding to the first focusing area, and the second PIR sensor is set corresponding to the second focusing area.

[0011] In one alternative approach, the first optical axis of the first focusing region and the second optical axis of the second focusing region are both tilted relative to the first direction, and the first optical axis and the second optical axis are in a forward-expanding state relative to each other.

[0012] In one alternative embodiment, the photosensitive device further includes a mounting housing disposed within an outer casing, wherein both the first PIR sensor and the second PIR sensor are disposed within the mounting housing; the front side of the mounting housing has an opening, and a lens covers the outer periphery of the front side of the mounting housing and closes the opening; the mounting housing and the lens are configured to jointly separate the space where the first PIR sensor and the second PIR sensor are located from other spaces within the outer casing.

[0013] In one alternative embodiment, the photosensitive device further includes a control component and a flexible circuit board. The flexible circuit board is disposed within a mounting housing. A first PIR sensor and a second PIR sensor are spaced apart and disposed on the front side of the flexible circuit board. The flexible circuit board extends out of the mounting housing and is electrically connected to the control component. The inner wall of the edge of the sensing window protrudes rearward to form a insertion wall. A lens is inserted into the insertion wall from rear to front. A first step is provided on the outer periphery of the rear side of the lens, and the first step abuts against the rear side of the insertion wall. A second step is provided on the outer periphery of the mounting housing, and the second step abuts against the rear side of the first step. A first connecting portion is also provided on the outer periphery of the mounting housing, located behind the second step. The first connecting portion is fixedly connected to the inner wall around the sensing window so that the first step is clamped between the second step and the insertion wall.

[0014] In one alternative embodiment, the photosensitive device further includes a sealing gasket fitted around the outer periphery of the lens and clamped between the first step portion and the insertion wall.

[0015] In one alternative embodiment, a first connecting hole is provided on the first connecting part, a second connecting part is provided on the outer periphery of the sealing gasket, a second connecting hole is provided on the second connecting part, and a connecting post is provided on the inner wall protruding around the sensing window. The first connecting hole, the second connecting hole and the connecting post are connected and fixed to each other by fasteners.

[0016] According to another aspect of the embodiments of this application, a surveillance camera is provided, including a control component, a lens component, and a photosensitive device as described above. The housing includes a front housing and a rear housing, with a sensing window opened on the front housing. The control component, the lens component, and the photosensitive device are all fixedly connected to the front housing, and the rear housing is fastened and fixed to the rear side of the front housing. The control component is electrically connected to the lens component and the photosensitive device respectively.

[0017] In one alternative embodiment, the surveillance camera also includes a battery compartment housing that is rotatably fastened to the rear side of the outer casing. The interior of the battery compartment housing is used to house the battery, and when the battery compartment housing is rotated and opened relative to the outer casing, the battery can be inserted into or removed from the battery compartment housing.

[0018] In one alternative embodiment, a limiting plate is provided on the inner wall of one side of the battery compartment housing, and a snap-fit ​​part is provided on the inner wall of the opposite side. The space behind the limiting plate is used for one side of the battery to be snapped in so that the limiting plate limits one side of the battery, and the snap-fit ​​part is used to snap with the other side of the battery. The battery includes a rechargeable battery or a combination of a dry cell battery and a tray.

[0019] In the photosensitive device provided in this application embodiment, the detection range is increased by setting a first PIR sensor and a second PIR sensor to work together. At the same time, in order to minimize the heat transfer between the first PIR sensor and the second PIR sensor, a baffle is also provided. The baffle blocks at least part of the heat between the first PIR sensor and the second PIR sensor to insulate the first PIR sensor and the second PIR sensor from heat and prevent them from interfering with each other.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1A perspective view of the front side of the photosensitive device provided in the embodiments of this application;

[0023] Figure 2 A perspective view of the photosensitive device from the rear side, provided in an embodiment of this application;

[0024] Figure 3 A perspective view of the front view of a surveillance camera provided in an embodiment of this application;

[0025] Figure 4 A perspective view of the front view of the surveillance camera provided in this application, showing the photosensitive device in an exploded state;

[0026] Figure 5 A top view of the PIR sensor and lens in a surveillance camera provided in an embodiment of this application;

[0027] Figure 6 A perspective view of the photosensitive device of the surveillance camera in an exploded state from the rear viewpoint provided in this application embodiment;

[0028] Figure 7 A cross-sectional view of a surveillance camera provided in an embodiment of this application;

[0029] Figure 8 A structural diagram of a surveillance camera with the rechargeable battery removed from the battery compartment shell, provided in an embodiment of this application.

[0030] Figure 9 This is a structural diagram of a surveillance camera with the rechargeable battery installed in the battery compartment shell, as provided in an embodiment of this application.

[0031] Figure 10 An exploded view of the rechargeable battery and battery compartment shell in a surveillance camera provided in an embodiment of this application;

[0032] Figure 11 A perspective view of the rear side of the rechargeable battery in a surveillance camera provided in an embodiment of this application;

[0033] Figure 12 An exploded view of the tray and rear side of the battery compartment shell in a surveillance camera provided in an embodiment of this application;

[0034] Figure 13 A perspective view of the front view of the dry cell battery and its tray in the surveillance camera provided in the embodiments of this application;

[0035] Figure 14 This is a structural diagram of the dry cell battery and its tray in the battery compartment of the surveillance camera provided in the embodiments of this application.

[0036] The reference numerals in the detailed embodiments are as follows:

[0037] 10. Photosensitive device;

[0038] 100. Surveillance cameras;

[0039] 110. Outer shell; 1101. Front shell; 1102. Rear shell; 1103. Protective shell; 111. Sensor window; 112. Insertion wall; 113. Connecting post; 114. Locking part;

[0040] 120. Control components; 130. Lens components;

[0041] 141. PIR sensor; 1411. First PIR sensor; 1412. Second PIR sensor;

[0042] 142. Lens; 1421. First focusing area; 1422. Second focusing area; 1423. First step;

[0043] 143. Mounting housing; 1431. Opening; 1432. Second step portion; 1433. First connecting portion; 1434. First connecting hole;

[0044] 144. Flexible circuit board;

[0045] 145. Baffle; 1451. First plate; 14511. First through hole; 14512. Second through hole; 1452. Second plate;

[0046] 146. Sealing gasket; 1461. Second connecting part; 1462. Second connecting hole;

[0047] 150. Battery compartment shell; 151. Lock; 152. Limiting plate; 153. Snap-fit ​​part; 154. Power board; 155. Pressure plate; 156. Charging interface; 157. First electrical contact;

[0048] 160. Battery; 161. Rechargeable battery; 1611. First limiting stage; 1612. First protrusion; 1613. Second electrical contact; 162. Dry cell battery; 163. Tray; 1631. Second limiting stage; 1632. Second protrusion; 1633. Third electrical contact. Detailed Implementation

[0049] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. In addition, the character " / " in this document generally indicates that the related objects before and after it have an "or" relationship.

[0054] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0055] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0057] This application initially considered increasing the detection range by arranging at least two PIR sensors (a first PIR sensor and a second PIR sensor). However, in practice, it was found that when the first PIR sensor and the second PIR sensor are working, the heat generated by one of them will be transferred to the other, thereby affecting the normal operation of the other.

[0058] Therefore, in addition to setting the first PIR sensor and the second PIR sensor apart, this application further adds a baffle between them to insulate the first PIR sensor and the second PIR sensor from heat and prevent them from interfering with each other.

[0059] Based on the above concept, according to one aspect of the embodiments of this application, a photosensitive device is provided. This photosensitive device can be a component integrated into a surveillance camera, night light, or other device, or it can be a standalone device. It performs photosensitive detection and signal transmission by connecting to the surveillance camera, night light, or other device. The following description and accompanying drawings illustrate the photosensitive device as a component integrated into a surveillance camera, and do not constitute a limitation on the specific implementation of the photosensitive device.

[0060] Please refer to details. Figure 1 The figure shows the exploded structure of the photosensitive device provided in the embodiment of this application. As shown in the figure, the photosensitive device 10 includes a housing 110, a PIR sensor 141, a lens 142 and a baffle 145, wherein the PIR sensor 141 includes a first PIR sensor 1411 and a second PIR sensor 1412.

[0061] The housing 110 has a sensing window 111, and the lens 142 is disposed at the sensing window 111. Specifically, the lens 142 and the housing 110 are assembled in the following ways, including but not limited to: the lens 142 is installed on the inner wall of the housing 110 and covers the sensing window 111; the lens 142 is covered on the outside of the sensing window 111; the lens 142 is embedded in the sensing window 111.

[0062] It should be noted that, along Figure 1As indicated by the double arrow X, the left side of the housing 110 is its outer side, and the right side is its inner side. The first PIR sensor 1411 and the second PIR sensor 1412 are disposed inside the lens 142. A baffle 145 is disposed inside the lens 142 and at least partially located between the first PIR sensor 1411 and the second PIR sensor 1412 to separate them.

[0063] In the photosensitive device 10 provided in this application embodiment, the detection range is increased by setting the first PIR sensor 1411 and the second PIR sensor 1412 to work together. At the same time, in order to minimize the heat transfer between the first PIR sensor 1411 and the second PIR sensor 1412, a baffle 145 is also provided. The baffle 145 blocks at least part of the first PIR sensor 1411 and the second PIR sensor 1412 to insulate the first PIR sensor 1411 and the second PIR sensor 1412 from heat and prevent them from interfering with each other.

[0064] Considering that the structural strength of lens 142 is generally low due to the limitations of available materials, in order to ensure that lens 142 is not easily deformed or damaged by force, baffle 145 can further abut against the inner wall of lens 142, thereby playing a supporting role for lens 142 and ensuring that the outer side of lens 142 is not easily deformed or damaged when subjected to pressure.

[0065] Regarding the specific structure of the baffle 145, this application proposes one embodiment, please refer to the following for details. Figure 2 The figure shows the exploded structure of the PIR sensor 141, lens 142, and baffle 145 from another perspective. As shown in the figure, the baffle 145 may include a first plate 1451, which is disposed in front of the first PIR sensor 1411 and the second PIR sensor 1412. The first plate 1451 has a first through hole 14511 and a second through hole 14512 spaced apart. The first PIR sensor 1411 extends into the first through hole 14511, and the second PIR sensor 1412 extends into the second through hole 14512. Thus, the first plate 1451 is respectively fitted around the outer periphery of the first PIR sensor 1411 and the second PIR sensor 1412, so as to separate the first PIR sensor 1411 and the second PIR sensor 1412 from each other, thereby achieving heat insulation and anti-interference, and also covering and protecting the first PIR sensor 1411 and the second PIR sensor 1412.

[0066] Furthermore, such as Figure 2As shown, the baffle 145 may further include a second plate 1452, which is disposed on the front side of the first plate 1451. Specifically, the second plate 1542 may be integrally formed with the first plate 1451 as shown, or it may be assembled and fixed to each other by means of bonding, snap-fitting, or screw connection. The second plate 1542 is located between the first through hole 14511 and the second through hole 14512, and the front side of the second plate 1452 abuts against the inner wall of the lens 142 to support the inner wall of the lens 142. The second plate 1452 is configured to partially separate the detection areas of the first PIR sensor 1411 and the second PIR sensor 1412 to prevent excessive overlap of their fields of view, which could lead to frequent repeated triggering.

[0067] The baffle 145 can be made of heat-insulating material, thereby improving the heat insulation effect between the space where the PIR sensor 141 is located and other spaces inside the housing 110, and reducing false alarms during the operation of the PIR sensor 141.

[0068] For the lens 142 that works with the PIR sensor 141, the longer its focal length, the stronger its ability to converge infrared radiation. Correspondingly, the detection distance of the PIR sensor 141 is also longer. However, as the focal length increases, the field of view of the lens will decrease, and correspondingly, the detection range of the PIR sensor will decrease.

[0069] For applications involving large-scale monitoring, such as wildlife hunting surveillance and forest fire prevention monitoring, the conventional solution is to deploy more surveillance cameras to achieve more comprehensive monitoring, which undoubtedly leads to increased costs.

[0070] Therefore, this application further proposes an implementation method, please refer to [link to relevant documentation] first. Figure 3 and Figure 4 The figures show the three-dimensional structure and exploded structure of the photosensitive device 10 provided in this application embodiment from a front view. As shown in the figures, the sensing window 111 is located on the front side of the housing along the first direction (the direction indicated by the double arrow X in the figures). Please further refer to the optical path diagram of the PIR sensor 141 and lens 142 shown in Figure 5. To solve the problem of reduced detection range, such as... Figure 5 The optical path shown by the dashed line, based on the arrangement of the first PIR sensor 1411 and the second PIR sensor 1412, has its field of view of the first PIR sensor 1411 and the second PIR sensor 1412 overlapped, so that their detection fields of view can be superimposed to form a continuous and large field of view. The infrared radiation within this large field of view can be effectively captured by the first PIR sensor 1411 or the second PIR sensor 1412, so that the surveillance camera 100 can take into account both a long detection distance and a wide detection range to meet the needs of large-scale monitoring scenarios.

[0071] exist Figure 5 In the specific embodiment shown, the lens 142 is divided into a first focusing region 1421 (the part to the left of the vertical double-dotted line in the figure) and a second focusing region 1422 (the part to the right of the vertical double-dotted line in the figure) along a second direction (the direction indicated by the double arrow Y in the figure). Each of the first and second focusing regions 1421 has its own focal point. A first PIR sensor 1411 is positioned corresponding to the first focusing region 1421, and a second PIR sensor 1412 is positioned corresponding to the second focusing region 1422. For example, the first PIR sensor 1411 can be positioned at the focal point of the first focusing region 1421, or it can be positioned at a specific distance from the first focusing region 1421, as long as effective light sensing detection is achieved. The second PIR sensor 1412 and the second focusing region 1422 are positioned similarly.

[0072] Specifically, lens 142 can be a Fresnel lens, which is composed of multiple concentric rings, each ring being equivalent to a part of a traditional lens. By adjusting the curvature and angle of the rings in different areas, a multi-focal setting can be achieved. After the first PIR sensor 1411 and the second PIR sensor 1412 are respectively positioned corresponding to the first focusing area 1421 and the second focusing area 1422, the concentric ring structure on the Fresnel lens can refract and focus the infrared radiation from a distant target onto the first PIR sensor 1411 or the second PIR sensor 1412. At the same time, the focusing effect of the first focusing area 1421 and the second focusing area 1422 can increase the infrared energy density received by the first PIR sensor 1411 and the second PIR sensor 1412, thereby effectively improving the detection range of the PIR sensor 141.

[0073] As mentioned earlier, in order to enable the PIR sensor 141 to have a longer detection distance, the focal length of the first focusing area 1421 and the second focusing area 1422 needs to be set to be larger, which will reduce the field of view of the first focusing area 1421 and the second focusing area 1422, and the detection range will be reduced accordingly.

[0074] In this embodiment, the lens 142 is divided into a first focusing region 1421 and a second focusing region 1422, and a PIR sensor 141 (first PIR sensor 1411 and second PIR sensor 1412) is respectively set at the focal point of each focusing region (first focusing region 1421 and second focusing region 1422). At the same time, it is ensured that the field of view of two adjacent PIR sensors overlaps, so that when the focal length of each focusing region is long (that is, the triggering distance of each PIR sensor 141 is far), the different field of view ranges of multiple PIR sensors 141 are superimposed to form a wider detection range.

[0075] It should be noted that dividing the lens 142 into two focusing regions (the first focusing region 1421 and the second focusing region 1422) and setting a sensor (the first PIR sensor 1411 and the second PIR sensor 1412) at the focal point of each focusing region is just an example. In some other embodiments, similarly, the lens 142 can be divided into more focusing regions, and a sensor can be set at the focal point of each focusing region. In such a scheme, it is necessary to ensure that the field of view between two adjacent sensors partially overlaps, so that the field of view of all sensors can be superimposed sequentially and finally form a wider detection range.

[0076] Of course, in some other embodiments, multiple lenses 142 can also be provided, with the first PIR sensor 1411 and the second PIR sensor 1412 respectively located at the focal point of a lens 142, thereby taking into account both a longer detection distance and a wider detection range to meet the needs of large-scale monitoring scenarios.

[0077] Considering that in actual detection work, the first PIR sensor 1411 and the second PIR sensor 1412 are triggered independently, if the fields of view of the first PIR sensor 1411 and the second PIR sensor 1412 overlap too much, it is easy for the same target to cause multiple triggers. That is, the same target can easily enter the field of view of the first PIR sensor 1411 and the second PIR sensor 1412 at the same time, thus causing both the first PIR sensor 1411 and the second PIR sensor 1412 to be triggered.

[0078] In order to reduce the probability of repeated triggering, such as Figure 5 As shown, the first optical axis L1 of the first focusing region 1421 and the second optical axis L2 of the second focusing region 1422 can both be tilted relative to the direction indicated by the double arrow X, and the first optical axis L1 and the second optical axis L2 are in a forward-expanding state, that is, the first optical axis L1 and the second optical axis L2 intersect behind the first PIR sensor 1411 and the second PIR sensor 1412.

[0079] Compared to the parallel arrangement of the first optical axis L1 and the second optical axis L2, setting them in a forward-expanding state can not only reduce the overlap range of the fields of view of the first PIR sensor 1411 and the second PIR sensor 1412 and reduce the probability of repeated triggering, but also further expand the overall field of view formed by the superposition of the fields of view of the first PIR sensor 1411 and the second PIR sensor 1412, thereby expanding the detection range.

[0080] It should be noted that, for the whole consisting of the first PIR sensor 1411 and the first focusing region 1421, the closer to the first optical axis L1 of the first focusing region 1421, the longer the detection distance; the farther away from the first optical axis L1, that is, the closer to the edge of the field of view of the first focusing region 1421, the shorter the detection distance. The same principle applies to the whole consisting of the second PIR sensor 1412 and the second focusing region 1422.

[0081] Based on this, such as Figure 5 As shown, the angle θ between the first optical axis L1 and the second optical axis L2 can be set to any angle within the range of 40° to 60°, such as 40°, 45°, 50°, 55°, 60°, etc. Practical verification has shown that within this angle range, targets located between the first optical axis L1 and the second optical axis L2 can be detected by at least one of the first PIR sensor 1411 or the second PIR sensor 1412, while minimizing the probability of re-triggered events. Setting the angle θ between the first optical axis L1 and the second optical axis L2 to any angle within the range of 40° to 60° can achieve a detection range of over 90° while maintaining a detection distance of 30m.

[0082] The PIR sensor 141 may be falsely triggered by heat sources other than human or animal heat sources. In this application, the detection sensitivity is increased when the first PIR sensor 1411 and the second PIR sensor 1412 are set up and their fields of view partially overlap, which further increases the probability of false triggering.

[0083] To minimize the risk of false triggering of the PIR sensor 141 due to heat generated by other heat-generating components inside the housing 110, this application further incorporates an independent spatial design for the PIR sensor 141. Please refer again for details. Figure 4 and further combine Figure 6 , Figure 6 The exploded structure of the photosensitive device 10 is shown from a rear view. As shown, the photosensitive device 10 may also include a mounting housing 143, which is disposed within the outer casing 110. The PIR sensor 141 is disposed within the mounting housing 143. The front side of the mounting housing 143 has an opening 1431, and a lens 142 covers the outer periphery of the front side of the mounting housing 143, closing the opening 1431. With this arrangement, the PIR sensor 141 is housed in the space formed by the lens 142 and the mounting housing 143, thereby separating the space where the PIR sensor 141 is located from other spaces within the outer casing 110. Consequently, the heat generated by heating elements in other spaces is less likely to directly or indirectly enter the space where the PIR sensor 141 is located, thereby reducing the probability of false triggering of the PIR sensor 141.

[0084] For specific assembly instructions for the PIR sensor 141, please refer to [link / reference needed]. Figure 4 and Figure 6 The photosensitive device 10 may also include a flexible circuit board 144, which is disposed inside the mounting housing 143. The first PIR sensor 1411 and the second PIR sensor 1412 are disposed on the front side of the flexible circuit board 144. The flexible circuit board 144 extends out of the mounting housing 143 and is electrically connected to the control component 120 to realize communication between the first PIR sensor 1411 and the second PIR sensor 1412 and the control component 120.

[0085] To improve the stability of the photosensitive device 10 assembly, this application further proposes an implementation method, which can be found in conjunction with [the specific implementation details]. Figure 4 and Figure 7 ,in Figure 7 A cross-sectional structure of the surveillance camera 100 is shown. The inner wall of the edge of the sensing window 111 can protrude rearward to form a insertion wall 112. The lens 142 is inserted into the insertion wall 112 from back to front. A first step portion 1423 is provided on the outer periphery of the rear side of the lens 142, and the first step portion 1423 abuts against the rear side of the insertion wall 112. A second step portion 1432 is provided on the outer periphery of the mounting housing 143, and the second step portion 1432 abuts against the rear side of the first step portion 1423. A first connecting portion 1433 is also provided on the outer periphery of the mounting housing 143. The first connecting portion 1433 is located behind the second step portion 1432 and is fixedly connected to the inner wall around the sensing window 111 so that the first step portion 1423 is clamped between the second step portion 1432 and the insertion wall 112.

[0086] The first connecting part 1433 and the inner wall around the sensing window 111 can be assembled and fixed by means of threaded fasteners, snap-fit, adhesive, etc., and the specific method is not limited here.

[0087] After the first connecting part 1433 is fixed to the inner wall around the sensing window 111, the mounting shell 143 can be assembled and fixed on the outer shell 110. At the same time, the first step part 1423 is clamped and limited by the cooperation between the second step part 1432 and the insertion wall 112, so that the lens 142 can also be effectively fixed. While ensuring the structural stability of the lens 142, there is no need to design additional assembly and connection parts on the lens 142, thereby simplifying the structure of the lens 142 and reducing the manufacturing cost of the lens 142.

[0088] In the embodiment where a mounting housing 143 is provided and the PIR sensor 141 is accommodated by fastening the mounting housing 143 to the lens 142, the baffle 145 can be provided inside the mounting housing 143 and abut against the inner wall of the lens 142 to ensure the reliability of the assembly of the baffle 145 and to ensure that the baffle 145 can provide good support for the lens 142.

[0089] Considering that the surveillance camera 100 is usually deployed outdoors, it needs to have good waterproof and dustproof capabilities. Therefore, this application proposes an implementation method for sealing the sensor window 111. Please refer to the following for details. Figure 4 , Figure 6 and Figure 7 The photosensitive device 10 also includes a sealing gasket 146, which is sleeved on the outer periphery of the lens 142 and clamped and fixed between the first step portion 1423 and the insertion wall 112.

[0090] The sealing gasket 146 is clamped between the first step portion 1423 and the insertion wall 112, so that the deformation of the sealing gasket 146 can better seal the gap between the lens 142 and the housing 110, thereby improving the waterproof and dustproof performance of the sensing window 111.

[0091] To facilitate the positioning of the sealing gasket 146 during assembly and to ensure structural stability after assembly, such as Figure 4 , Figure 6 and Figure 7 As shown, a first connecting hole 1434 may be provided on the first connecting part 1433, a second connecting part 1461 is provided on the outer periphery of the sealing gasket 146, a second connecting hole 1462 is provided on the second connecting part 1461, and a connecting post 113 is provided on the inner wall protruding around the sensing window 111. The first connecting hole 1434, the second connecting hole 1462 and the connecting post 113 are connected and fixed to each other by fasteners (such as screws, expansion buckles, etc.).

[0092] In this embodiment, by connecting the first connecting hole 1434, the second connecting hole 1462, and the connecting post 113 to each other with fasteners, the mounting shell 143, the lens 142, and the sealing gasket 146 can be assembled and fixed onto the outer shell 110 in a single assembly operation. At the same time, the fasteners passing through the second connecting hole 1462 limit the sealing gasket 146, which can position the sealing gasket 146 during assembly. After assembly, it can also ensure that the sealing gasket 146 is not easily displaced, thereby ensuring sealing performance.

[0093] According to another aspect of the embodiments of this application, a surveillance camera is also provided, which is included, but not limited to, applications in fields such as outdoor hunting monitoring, forest fire prevention monitoring, wildlife observation, traffic monitoring and management, border protection, and urban security.

[0094] like Figure 4 and Figure 6As shown, the surveillance camera 100 includes a control component 120, a lens assembly 130, and a photosensitive device 10 provided in any of the above embodiments. The housing 110 includes a front housing 1101 and a rear housing 1102. A sensing window 111 is formed on the front housing 1101. The control component 120, lens assembly 130, and photosensitive device 10 are all fixedly connected to the front housing 1101. The rear housing 1102 is fastened and fixed to the rear side of the front housing 1101. The control component 120 is electrically connected to the lens assembly 130 and the photosensitive device 10, respectively.

[0095] Among them, the control component 120 can be Figure 4 The single motherboard shown can also be composed of multiple independent module boards that are electrically connected to each other. The lens assembly 130 can be directly integrated onto the motherboard or integrated onto an additional sub-circuit board.

[0096] like Figure 3 As shown in the diagram, the double arrow X indicates the first direction, the double arrow Y indicates the second direction, and the double arrow Z indicates the third direction, corresponding to the three axes respectively. The lens assembly 130 is exposed on the front side of the housing 110 along the first direction (i.e., Figure 3 The lens assembly 130 is located on the lower left side (as indicated by the double arrow X, and the rear side mentioned below is the opposite) and is electrically connected to the control component 120. The control component 120 controls the lens assembly 130 to acquire images of the external environment in order to realize the video monitoring function.

[0097] The control assembly 120, lens assembly 130, and photosensitive device 10 can all be locked and fixed to the inner wall of the front shell 1101 by means of screw connection or snap-fit, while the rear shell 1102 can be fixed to the front shell 1101 by snap-fit, thereby realizing the drilling-free assembly design of the front shell 1101 and the rear shell 1102, improving the overall neatness and aesthetics of the shell 110.

[0098] Considering that the control assembly 120, lens assembly 130, and photosensitive device 10 are all mounted on the front housing 1101, in order to improve the structural strength of the front housing 1101, such as Figure 4 and Figure 6 As shown, the front side of the front shell 1101 can be further covered by a protective shell 1103. The protective shell 1103 can be fixedly connected to the front shell 1101 by means of screw connection or snap-fit ​​connection. The protective shell 1103 covers the front side of the front shell 1101 to protect the front shell 1101 and prevent the front shell 1101 from being damaged due to bumps or other factors.

[0099] The surveillance camera 100 may also include a battery compartment housing. To facilitate convenient battery removal and replacement, this application further improves the design of the battery compartment housing of the surveillance camera 100. Please refer to [link / reference] for details. Figure 8The figure shows the structure of the battery compartment housing in the open state. As shown, the battery compartment housing 150 is rotatably fastened to the rear side of the outer casing 110. The interior of the battery compartment housing 150 is used to accommodate the battery 160. When the battery compartment housing 150 is rotated and opened relative to the outer casing 110 (e.g., Figure 8 (As shown in the diagram), the battery 160 can be installed into or removed from the battery compartment housing 150.

[0100] exist Figure 8 In the specific embodiment shown, the battery compartment shell 150 is rotatably connected to the outer shell 110 on one side, and hooked to the locking part 114 on the outer shell 110 via a latch 151 on the other side, thereby achieving detachable fixing of the battery compartment shell 150 and the outer shell 110.

[0101] For the specific structure of the battery compartment housing 150, please refer to section 8. A limiting plate 152 is provided on a protruding inner wall on one side of the battery compartment housing 150, and a snap-fit ​​part 153 is provided on the opposite inner wall. The space behind the limiting plate 152 is used for one side of the battery 160 to be snapped in, so that the limiting plate 152 limits one side of the battery 160. The snap-fit ​​part 153 is used to snap with the other side of the battery 160 to detachably fix the battery 160 in the battery compartment housing 150. Specifically, the snap-fit ​​part 153 and the battery 160 can be engaged by two protrusions or by a protrusion and a groove; the specific method is not limited here.

[0102] To ensure compatibility with both rechargeable batteries (e.g., lithium batteries) and dry cell batteries for installation and power supply, both rechargeable and dry cell batteries are installed in the battery compartment housing 150 using the same fixing method. Furthermore, both rechargeable and dry cell batteries are configured with contact structures in the same location to form an electrical connection with the electrical contacts in the battery compartment housing 150. Specifically, as... Figure 8 As shown, for the rechargeable battery 161, a first limiting platform 1611 is provided on its top. The first limiting platform 1611 extends into the rear side of the limiting plate 152 and abuts against the limiting plate 152, so that the side of the rechargeable battery 161 where the first limiting platform 1611 is located is restricted in the battery compartment shell 150. The other side of the rechargeable battery 161 is correspondingly provided with a first protrusion 1612. After the other side of the rechargeable battery 161 is pressed into the battery compartment shell 150, the first protrusion 1612 is engaged in the engaging part 153, thereby fixing the rechargeable battery 161 in the battery compartment shell 150. Figure 9 As shown in the diagram, the process is reversed when removing the rechargeable battery 161.

[0103] Please see Figure 10 and Figure 11 , Figure 10 The exploded structure of the rechargeable battery 161 and the battery compartment shell 150 is shown. Figure 11The rear structure of the rechargeable battery 161 is shown. A power board 154 is housed inside the battery compartment housing 150. The power board 154 is electrically connected to the control assembly 120. The power board 154 can be fixed and pressed against the inner wall of the battery compartment housing 150 by a pressure plate 155. The power board 154 has a charging interface 156 exposed from the outside of the battery compartment housing 150, and a first electrical contact 157 exposed from the inside of the battery compartment housing 150. Correspondingly, the rechargeable battery 161 has a second electrical contact 1613. After the rechargeable battery 161 is inserted into the battery compartment housing 150, the second electrical contact 1613 and the first electrical contact 157 form electrical contact, thereby enabling the rechargeable battery 161 to supply power to the internal circuitry of the outer casing 110. Furthermore, the rechargeable battery 161 can be charged when an external power source is connected to the charging interface 156.

[0104] Since a dry cell battery is a single cylindrical cell, it cannot be fixed within the mounting space of the rechargeable battery 161. Therefore, this application uses a detachable tray for mounting the dry cell battery to facilitate its installation and removal. Please refer to [link to details]. Figure 12 and Figure 13 , Figure 12 The exploded structure of the dry cell battery and its tray, along with the battery compartment shell 150, is shown from a rear view. Figure 13 The figure shows a three-dimensional structure of the dry cell battery and its tray from a frontal view. As shown, the tray 163 can accommodate multiple dry cell batteries 162 and electrically connect them. The installation of the tray 163 within the battery compartment housing 150 is consistent with that of the rechargeable battery 161. Specifically, a second limiting platform 1631 is provided on one side of the tray 163, and a second protrusion 1632 is provided on the opposite side. When installing the tray 163 and the dry cell batteries 162 thereon, the second limiting platform 1631 is first snapped into the rear side of the limiting plate 152, and then the other side of the tray 163 is pressed into the battery compartment housing 150 so that the second protrusion 1632 engages with the snap-fit ​​part 153. This achieves the installation of the tray 163 and the dry cell batteries 162 thereon within the battery compartment housing 150. After installation, the tray 163 is positioned as follows: Figure 14 The state shown.

[0105] Accordingly, such as Figure 12 As shown, a third electrical contact 1633 is provided on the tray 163 to form an electrical connection with the dry cell battery 162 thereon. After the tray 163 and the dry cell battery 162 thereon are put into the battery compartment shell 150, the third electrical contact 1633 forms an electrical contact with the first electrical contact 157, thereby realizing the power supply of the dry cell battery 162 to the circuit inside the outer shell 110.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A photosensitive device, characterized in that, include: The outer casing has a sensor window on it; A lens, wherein the lens is disposed at the sensing window; The first PIR sensor and the second PIR sensor are disposed inside the lens; A baffle is disposed inside the lens and at least partially located between the first PIR sensor and the second PIR sensor to separate the first PIR sensor and the second PIR sensor.

2. The photosensitive device according to claim 1, characterized in that, The baffle abuts against the inner wall of the lens.

3. The photosensitive device according to claim 2, characterized in that, The baffle includes a first plate body; The first plate is disposed in front of the first PIR sensor and the second PIR sensor. A first through hole and a second through hole are spaced apart on the first plate. The first PIR sensor extends into the first through hole and the second PIR sensor extends into the second through hole.

4. The photosensitive device according to claim 3, characterized in that, The baffle also includes a second plate, which is disposed on the front side of the first plate and located between the first through hole and the second through hole. The front side of the second plate abuts against the lens, and the second plate is configured to partially separate the detection areas of the first PIR sensor and the second PIR sensor.

5. The photosensitive device according to claim 1, characterized in that, The sensing window is located on the front side of the housing along the first direction, and the field of view of the first PIR sensor and the second PIR sensor overlap. The lens is divided into a first focusing region and a second focusing region along a second direction, wherein the second direction is perpendicular to the first direction; The first focusing area and the second focusing area each have a separate focal point. The first PIR sensor is set for the first focusing area, and the second PIR sensor is set for the second focusing area.

6. The photosensitive device according to claim 5, characterized in that, The first optical axis of the first focusing region and the second optical axis of the second focusing region are both inclined relative to the first direction, and the first optical axis and the second optical axis are in a forward-expanding state relative to each other.

7. The photosensitive device according to claim 1, characterized in that, The photosensitive device further includes a mounting housing, which is disposed within the outer casing, and both the first PIR sensor and the second PIR sensor are disposed within the mounting housing; The mounting housing has an opening on its front side, and the lens covers the outer periphery of the front side of the mounting housing and closes the opening. The mounting housing and the lens are configured to jointly separate the space where the first PIR sensor and the second PIR sensor are located from other spaces within the housing.

8. The photosensitive device according to claim 7, characterized in that, The photosensitive device further includes a control component and a flexible circuit board. The flexible circuit board is disposed inside the mounting housing. The first PIR sensor and the second PIR sensor are disposed at intervals on the front side of the flexible circuit board. The flexible circuit board extends out of the mounting housing and is electrically connected to the control component. The inner wall of the edge of the sensing window protrudes rearward to form an insertion wall. The lens is inserted into the insertion wall from back to front. A first step is provided on the outer periphery of the rear side of the lens, and the first step abuts against the rear side of the insertion wall. A second step is provided on the outer periphery of the mounting shell, and the second step abuts against the rear side of the first step. The outer periphery of the mounting housing is also provided with a first connecting part, which is located on the rear side of the second step portion. The first connecting part is fixedly connected to the inner wall around the sensing window so that the first step portion is clamped between the second step portion and the insertion wall.

9. The photosensitive device according to claim 8, characterized in that, The photosensitive device also includes a sealing gasket, which is sleeved on the outer periphery of the lens and clamped and fixed between the first stepped portion and the insertion wall.

10. The photosensitive device according to claim 9, characterized in that, The first connecting part has a first connecting hole, the outer periphery of the sealing gasket has a second connecting part, the second connecting part has a second connecting hole, the inner wall around the sensing window has a protruding connecting post, and the first connecting hole, the second connecting hole and the connecting post are connected and fixed to each other by fasteners.

11. A surveillance camera, characterized in that, The device includes a control assembly, a lens assembly, and a photosensitive device according to any one of claims 1-10. The housing includes a front housing and a rear housing. The sensing window is opened on the front housing. The control assembly, the lens assembly, and the photosensitive device are all fixedly connected to the front housing. The rear housing is fastened and fixed to the rear side of the front housing. The control component is electrically connected to the lens assembly and the photosensitive device, respectively.

12. The surveillance camera according to claim 11, characterized in that, The surveillance camera also includes a battery compartment housing, which is rotatably fastened to the rear side of the outer shell. The interior of the battery compartment housing is used to house the battery. When the battery compartment housing is rotated and opened relative to the outer shell, the battery can be inserted into or removed from the battery compartment housing.

13. The surveillance camera according to claim 12, characterized in that, A limiting plate is provided on the inner wall of one side of the battery compartment shell, and a snap-fit ​​part is provided on the inner wall of the opposite side. The space behind the limiting plate is used for one side of the battery to be snapped in, so that the limiting plate limits one side of the battery. The snap-fit ​​part is used to snap with the other side of the battery. The battery includes a rechargeable battery or a combination of a dry cell battery and a tray.

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