A detection device

Abstract

The utility model provides a kind of detection device, including shell and the first circuit board being set to the shell inside, the first circuit board is provided with induction module;The first circuit board is divided into the strong current area of carrying strong current circuit and the weak current area of carrying weak current circuit, the strong current area and weak current area are separated by an insulating region, the induction module is set to the weak current area;The weak current area of the first circuit board is provided with electronic switch, the shell is provided with the button for triggering the electronic switch.The utility model provides the induction performance of detection device and be promoted.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a detection device. Background Technology

[0002] As people's living standards improve, the demand for intelligent living is increasing, especially the demand for the sensing performance of sensors. Only by obtaining accurate sensing results can reliable execution basis be provided for terminal devices in intelligent scenarios.

[0003] There is room for improvement in the sensing performance of existing sensors. Utility Model Content

[0004] Existing top-mounted human body sensors typically contain a low-voltage board and a high-voltage board. The high-voltage board is fixedly connected to the outer casing, while the low-voltage board is supported by it. An electronic switch is located on the front of the low-voltage board, receiving pressure perpendicular to the board. A button is generally located on the front of the sensor body so that it applies pressure perpendicular to the low-voltage board to the electronic switch. When the electronic switch receives pressure parallel to the low-voltage board, it causes the board to shift in a direction parallel to the board, leading to misalignment between the low-voltage and high-voltage boards and unstable connection between them. Therefore, the button is generally not located on the side of the sensor body to avoid the electronic switch receiving pressure parallel to the board. However, placing the button on the front of the sensor body occupies frontal space and affects the sensor's sensing performance.

[0005] One objective of this invention is to provide a detection device in which an electronic switch is directly mounted on a high-voltage board, avoiding the application of pressure to a low-voltage board. Thanks to the high-voltage board being directly fixed to the outer casing, the electronic switch can receive lateral pressure. In accordance with this invention, the button is mounted on the side of the detection body, so the button does not occupy the space on the front of the detection body, thereby improving the sensing performance of the detection device.

[0006] Another objective of this invention is to provide a detection device in which the strong current area and the weak current area are separated by an insulating area, resulting in high safety in the weak current area. The electronic switch located in the weak current area does not involve the risk of electric shock, and the button can simplify the structure.

[0007] Another objective of this invention is to provide a detection device in which the distance between the high-voltage area and the low-voltage area is greater than or equal to 3mm, so as to achieve electrical isolation between the high-voltage area and the low-voltage area and eliminate the risk of electric shock from the low-voltage area. Another objective of this invention is to provide a detection device in which an electronic switch is mounted on a high-voltage board, which is fixedly installed on the outer casing, enabling the electronic switch to receive lateral pressing pressure. In this embodiment of the invention, the button is mounted on the side of the detection body, so that the button does not occupy the space on the front of the detection body, thus ensuring that the sensing performance of the detection device is not affected.

[0008] Another objective of this invention is to provide a detection device in which, thanks to the separation of the high-voltage area and the low-voltage area by an insulating area, there is no risk of electric shock in the low-voltage area. Creepage distance does not need to be considered when designing the button, and the button can be formed by dividing it with a dividing seam.

[0009] Another objective of this invention is to provide a detection device in which the button is located on the side of the detection body, thereby ensuring the integrity of the sensing cover and allowing sufficient space for the lens assembly to be installed in the sensing cover, so as to improve the sensing performance of the pyroelectric sensing element.

[0010] Another objective of this invention is to provide a detection device in which an isolation housing shields the high-voltage area of ​​the first circuit board to prevent it from being burned. The cutout portion exposes at least a portion of the low-voltage area, ensuring the normal operation of the sensing module.

[0011] Another objective of this invention is to provide a detection device in which the hollowed-out portion of the isolation housing exposes the radar module and the pyroelectric sensing element, thereby ensuring the normal operation of the radar module and the pyroelectric sensing element.

[0012] Another objective of this invention is to provide a detection device in which the distance between the radar module and the first circuit board is greater than the distance between the isolation housing and the first circuit board, i.e., the radar module is located outside the isolation housing, which improves the sensing performance of the radar module.

[0013] Another objective of this invention is to provide a detection device in which the isolation housing is made of flame-retardant material and its melting point is higher than that of the induction cover, so as to improve the fire resistance of the detection device.

[0014] Another objective of this invention is to provide a detection device in which the user presses the pressing part by pressing the extension arm, thereby increasing the safety of the wiring.

[0015] Another objective of this invention is to provide a detection device in which a portion of the conductive spring is located below the first hole, and the extension arm covers the first hole, thereby preventing the user from contacting the first hole and improving the safety of wiring.

[0016] To achieve at least one of the above objectives, the present invention provides a detection device, including a housing and a first circuit board disposed inside the housing. The first circuit board is provided with a sensing module. The first circuit board is divided into a high-voltage area carrying a high-voltage circuit and a low-voltage area carrying a low-voltage circuit. The high-voltage area and the low-voltage area are separated by an insulating area. The sensing module is disposed in the low-voltage area. An electronic switch is disposed in the low-voltage area of ​​the first circuit board, and the housing is provided with a button for triggering the electronic switch.

[0017] Furthermore, the distance between the high-voltage region and the low-voltage region is greater than or equal to 3 mm.

[0018] In some embodiments, the electronic switch is disposed at the edge of the first circuit board, the trigger lever of the electronic switch protrudes laterally from the first circuit board, and the button presses the trigger lever laterally to trigger the electronic switch.

[0019] Furthermore, the outer casing sidewall is divided by a slit, with three sides of the slit connected to form the button within the area enclosed by the slit. A connecting arm is formed on the non-connected side of the slit, and the button is integrally connected to the outer casing sidewall via the connecting arm.

[0020] In some embodiments, one side of the housing is open, and a sensing cover is provided on the open side. A Fresnel lens is integrally formed on the inner surface of the sensing cover. The sensing module includes a pyroelectric sensing element, which is disposed on the side of the first circuit board facing the sensing cover.

[0021] Furthermore, an isolation shell is provided between the sensing cover and the first circuit board. The isolation shell includes a hollow portion and a shielding portion. The shielding portion shields the high-voltage area of ​​the first circuit board, and the hollow portion exposes at least a portion of the low-voltage area.

[0022] Furthermore, the sensing module also includes a radar module, and the cutout portion of the isolation housing exposes the radar module and the pyroelectric sensing element; the distance between the radar module and the first circuit board is greater than the distance between the isolation housing and the first circuit board.

[0023] In some embodiments, the isolation housing is made of a flame-retardant material with a melting point higher than that of the induction cover.

[0024] In some embodiments, the first circuit board is provided with a connector for connecting to high voltage, the connector including a pressing part, the housing extending an extension arm that covers the pressing part, and the extension arm can be pressed to press against the pressing part.

[0025] Furthermore, the connector also includes insertion holes corresponding to the pressing parts. When the pressing part is pressed down, external wires can be inserted into or pulled out of the insertion holes. When the pressing part is released, the external wires are confined within the insertion holes. The extension direction of the extension arm is a second direction, and the insertion holes are located on the side of the pressing part facing the second direction. The connector has a first hole on the side of the pressing part away from the second direction, and the first hole is located within the coverage area of ​​the extension arm. The connector is located on the side of the first circuit board away from the sensing module, and the housing has an operation hole to expose the insertion holes so that external wires can be inserted into the insertion holes. The connector is constructed as a terminal block, and the pressing part is constructed as a columnar structure protruding from the surface of the terminal block. The terminal block includes a conductive spring, and the first hole communicates with the conductive spring.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the present invention. The foregoing descriptions of the present invention can be combined in any way, and these and other objectives of the present invention will be fully realized through the following detailed description and accompanying drawings.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the installation of a detection device according to an embodiment of the present invention; Figure 2 This is a side view of the detection device of this utility model installed on a ceiling panel according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a detection device installed on a ceiling panel according to an embodiment of the present invention, with the device facing a first orientation and a second orientation. Figure 4 This is a schematic diagram of the overall structure of the detection device according to an embodiment of the present invention; Figure 5 This is a schematic diagram showing the connection between the detection body and the installation components according to an embodiment of the present invention; Figure 6This is a partially enlarged view of the mounting ring and connecting portion according to an embodiment of the present invention; Figure 7 This is a partially enlarged view of the mounting ring and connecting portion according to an embodiment of the present invention; Figure 8 This is a partially enlarged view of the detection body according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of a detection device installed on a ceiling panel according to an embodiment of the present invention, with the device facing a first orientation and a second orientation. Figure 10 This is a schematic diagram of the detection main structure according to an embodiment of the present invention; Figure 11 This is a cross-sectional view of a detection device according to an embodiment of the present invention; Figure 12 This is a cross-sectional view of the detection device according to an embodiment of the present invention at point AA; Figure 13 This is an exploded view of the detection body according to an embodiment of this utility model; Figure 14 This is an assembly diagram of the sensor cover, outer shell, and other components of the detection body according to an embodiment of the present invention. Figure 15 This is a front view of the sensor cover according to an embodiment of the present invention; Figure 16 This is a schematic diagram of the lens unit structure according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the sensor cover structure according to an embodiment of the present invention; Figure 18 This is a schematic diagram of the sensor cover structure according to an embodiment of the present invention; Figure 19 This is a schematic diagram of the sensor cover structure according to an embodiment of the present invention; Figure 20 This is a schematic diagram of the isolation shell structure according to an embodiment of the present invention; Figure 21 This is a front view of the detection body without the sensor cover according to an embodiment of the present invention; Figure 22 This is a schematic diagram showing the connection between the first circuit board and the second circuit board according to an embodiment of the present invention; Figure 23 This is a schematic diagram of the outer shell structure of an embodiment of the present utility model; Figure 24 This is a schematic diagram of the structure of the first circuit board and electronic components according to an embodiment of the present invention; Figure 25 This is a perspective sectional view of the outer casing, first circuit board, second circuit board, and electronic components according to an embodiment of the present invention. Detailed Implementation

[0030] In the description of this utility model, the terms "inner", "outer", "horizontal", "vertical", "upper", "lower", "top", "bottom", "left", "right", etc., 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 this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by the present utility model.

[0034] Existing concealed sensors are typically embedded in ceiling panels, with only the front exposed and the sides hidden inside. The sensor has buttons on its front, allowing users to perform functions like resetting the network or restarting without removing the sensor. However, this design compromises the integrity of the sensor's front surface, and the button structure occupies space, affecting the sensor's sensing performance.

[0035] To solve the above problems, according to a first aspect of this utility model, a detection device 100 is provided. Please refer to [link to relevant documentation]. Figures 1-25The detection device 100 provided by this utility model will be specifically explained. In the embodiments of this utility model, the detection device 100 may be an infrared pyroelectric detection device, a radar detection device, or a detection device integrating an infrared pyroelectric module and a radar module. However, the protection scope of this utility model is not limited to these types of detection devices. In other embodiments, the detection device 100 may also be other directional detection devices, such as a distance detection device.

[0036] like Figures 1-9 As shown, the detection device 100 includes a mounting assembly 120 and a detection body 110 movably connected to the mounting assembly 120. The mounting assembly 120 is used to mount on a mounting surface 210. The detection body 110 is movable relative to the mounting assembly 120 to switch between a first connection state and a second connection state. The detection body 110 includes a button 11 disposed on its side. When the mounting assembly 120 is mounted on the mounting surface 210 and the detection body 110 is in the first connection state, the button 11 is hidden. When the mounting assembly 120 is mounted on the mounting surface 210 and the detection body 110 is in the second connection state, the button 11 is exposed.

[0037] The movable connection can be a rotational connection, a sliding connection, or other movable connection methods. The first connection state can be understood as the detection body 110 being in a first position or at a first angle relative to the mounting component 120, and the second connection state can be understood as the detection body 110 being in a second position or at a second angle relative to the mounting component 120. The mounting surface 210 can be understood as the surface used to install the detection device 100, such as the lower surface of the ceiling panel 200, the outer surface of the wall panel, etc. The button 11 being hidden can be understood as the user not being able to see the button 11 after the detection device 100 is installed on the mounting surface 210.

[0038] The detection device 100 provided by this utility model has the button 11 located on the side of the detection body 110. This not only preserves the integrity of the front of the detection body 110, but also ensures that the button 11 does not occupy the space on the front of the detection body 110. This allows sufficient space on the front of the detection body 110 to arrange the sensing module 2 and the lens assembly 32. Furthermore, the related structure of the button 11 will not obstruct the sensing signal, thereby improving the sensing performance of the detection device 100.

[0039] It is worth noting that the detection body 110 can move relative to the mounting component 120 to switch between the first connection state and the second connection state, thereby switching the button 11 between the hidden and exposed states. When the button 11 is in the hidden state, the detection device 100 protrudes from the mounting surface 210 with a relatively thin thickness to achieve an ultra-thin visual effect. When the button 11 is in the exposed state, the user can press the button 11 without removing the detection device 100.

[0040] In summary, the detection device 100 provided by this utility model not only allows the button 11 to be pressed without removing the detection device 100, but also achieves an ultra-thin visual effect for the top-mounted detection device 100, while maintaining the integrity of the front of the detection body 110. The button 11 does not occupy the space on the front of the detection body 110, thereby improving the sensing performance of the detection device 100.

[0041] like Figure 9 As shown, when the detection body 110 is in the first connection state, the height of the detection body 110 protruding from the mounting surface 210 is set to H1. When the detection body 110 is in the second connection state, the height of the detection body 110 protruding from the mounting surface 210 is set to H2. Then H1 < H2, so that when the button 11 is hidden, the thickness of the detection body 110 protruding from the mounting surface 210 is thinner, so as to achieve an ultra-thin visual effect.

[0042] In some embodiments, such as Figures 1-9 As shown, the detection device 100 includes a mounting assembly 120 and a detection body 110 rotatably connected to the mounting assembly 120. The detection body 110 rotates relative to the mounting assembly 120 to switch between a first orientation and a second orientation. The detection body 110 includes a button 11 disposed on its side. When the mounting assembly 120 is mounted on the mounting surface 210 and the detection body 110 is in the first orientation, the button 11 is hidden. When the mounting assembly 120 is mounted on the mounting surface 210 and the detection body 110 is in the second orientation, the button 11 is exposed.

[0043] The detection device 100 provided by this utility model has a detection body 110 that can rotate relative to the mounting assembly 120. This not only allows for adjustment of the detection direction, but also enables the button 11 to switch between hidden and exposed states during the rotation of the detection body 110. This allows the button 11, located on the side of the detection body 110, to be operated, and the user can press the button 11 without removing the detection device 100. At the same time, it also ensures the integrity of the front of the detection body 110, as the button 11 does not occupy the space on the front of the detection body 110, thereby improving the sensing performance of the detection device 100. In addition, when the detection body 110 is rotated to the hidden state of the button 11, most of the volume of the detection device 100 is embedded in the ceiling panel 200, resulting in an ultra-thin visual effect.

[0044] Since the function of button 11 is generally to reset the network configuration or restart, its usage frequency is very low. When button 11 is not in use, it can be hidden, making the thickness of the detection device 100 protruding from the mounting surface 210 relatively thin, thus achieving an ultra-thin visual effect. When button 11 needs to be used, simply rotate the detection body 110 to expose button 11 downwards; button 11 can be pressed without removing the detection device 100.

[0045] The orientation of the detection subject 110 can be understood as the detection direction, that is, the direction in which the detection subject 110 faces the sensing area. The first orientation and the second orientation have already been... Figure 9 The sensing area can be understood as the area formed by the sensing range of the detection device 100, where a human body can trigger the detection device 100 when within the sensing area. When the detection subject 110 is in the first orientation, it is in the first connection state; when the detection subject 110 is in the second orientation, it is in the second connection state.

[0046] The button 11 being hidden can be understood as the user not being able to see the button 11 after the detection device 100 is installed on the mounting surface 210. When the detection device 100 is installed on the mounting surface 210 and in the first orientation, such as Figure 3 As shown in the first image, only the front of the detection body 110 is exposed, and the user cannot see the button 11 located on the side of the detection body 110; when the detection body 110 is in the second orientation, as... Figure 3 As shown in the second image, the button 11 located on the side of the detection body 110 is exposed downwards.

[0047] In another embodiment (not shown in the figure), the detection body 110 is slidably connected to the mounting component 120. The detection body 110 slides up and down relative to the mounting component 120 to switch between a first position and a second position. The detection body 110 includes a button 11 disposed on its side. When the mounting component 120 is mounted on the mounting surface 210 and the detection body 110 is in the first position, the button 11 is hidden. When the mounting component 120 is mounted on the mounting surface 210 and the detection body 110 is in the second position, the button 11 is exposed. When the user needs to press the button 11, the detection body 110 can slide down to expose the button 11. When the user does not need to press the button 11, the detection body 110 can be pushed up into the mounting component 120 to hide the button 11. In a further optimized embodiment, the mounting component 120 is provided with a positioning structure. When the detection body 110 is in the first position, the detection body 110 is positioned.

[0048] In some embodiments, such as Figure 2 , Figure 3 and Figure 9 As shown, the mounting assembly 120 includes a mounting ring 6 for fitting against the mounting surface 210. The detection body 110 rotates within the mounting ring 6 to switch between the first orientation and the second orientation. The rotation of the detection body 110 within the mounting ring 6 reduces the lateral gap between the detection body 110 and the mounting ring 6, thus concealing the button 11. Furthermore, when the lower surface of the detection body 110 is approximately parallel to the mounting surface 210, most of the volume of the detection body 110 is located above the mounting ring 6, and the thickness of the detection body 110 protruding from the mounting surface 210 is relatively thin, weakening the visual presence of the detection device 100 and achieving an ultra-thin visual effect.

[0049] Furthermore, the detection body 110 rotates vertically relative to the mounting ring 6, and in conjunction with the horizontal rotation of the mounting ring 6, the detection body 110 can adjust the detection direction within a conical space.

[0050] Among them, Figure 9 In the diagram, the ceiling panel 200 and the mounting components 120 are shown in cross-section, while the inspection body 110 is not shown in cross-section.

[0051] In some implementations, such as Figure 9As shown, when the detection body 110 is in the first orientation, the height of the detection body 110 protruding from the mounting surface 210 is H1; when the detection body 110 is in the second orientation, the height of the detection body 110 protruding from the mounting surface 210 is H2, where H1 < H2, so that when the button 11 is hidden, the thickness of the detection body 110 protruding from the mounting surface 210 is thinner, thereby achieving an ultra-thin visual effect. In some embodiments, H1 < 0.6 * H2, so that when the button 11 is hidden, the thickness of the detection body 110 protruding from the mounting surface 210 is even thinner. In an exemplary embodiment, H1 = 8 mm, H2 = 18.8 mm.

[0052] In some embodiments, such as Figure 11 As shown, the detection body 110 includes a sensing surface 31 facing the sensing area. The sensing surface 31 protrudes downward relative to the mounting ring 6, and the protrusion height L4 is less than 10 mm. In an exemplary embodiment, L4 = 5 mm.

[0053] Furthermore, such as Figure 2 , Figure 3 and Figure 9 As shown, the mounting component 120 is embedded in the mounting surface 210. The mounting ring 6 has a first surface 61 for conforming to the mounting surface 210. The first orientation is perpendicular to the first surface 61, and the second orientation is inclined to the first surface 61. When the detection body 110 is in the second orientation, the side of the detection body 110 is obliquely exposed to the inside of the mounting ring 6, thereby exposing the button 11. Thanks to the first orientation being perpendicular to the first surface 61, when the detection body 110 is in the first orientation, its lower surface is in a state of near-parallelism with the mounting surface 210. At this time, the thickness of the detection body 110 protruding from the mounting surface 210 reaches a minimum, achieving an ultra-thin visual effect.

[0054] Furthermore, the mounting ring 6 extends upward to form a connecting portion 7, and the mounting surface 210 has a mounting hole 220. The connecting portion 7 is embedded in the mounting hole 220, and the mounting ring 6 can rotate horizontally around the mounting hole 220. The detection body 110 rotates vertically relative to the mounting ring 6, and in conjunction with the horizontal rotation of the mounting ring 6, the detection body 110 can adjust its detection direction within a conical space.

[0055] Furthermore, such as Figure 3 and Figure 9As shown, when the detection body 110 is in the second orientation, the button 11 is fully exposed; the angle between the second orientation and the first orientation is set to be greater than 18°. Full exposure can be understood as the entire button 11 being located below the mounting ring 6. In an exemplary embodiment, as... Figure 9 As shown, the angle between the second orientation and the first orientation is set to 35°. When the detection body 110 rotates 23° clockwise relative to the first orientation, the button 11 is fully exposed. When the detection body 110 rotates 35° clockwise relative to the first orientation, the detection device 100 is in the second orientation, at which point the button 11 is lower and has a larger operable space. In other embodiments, the angle between the second orientation and the first orientation can be set to a certain angle between 18° and 43°. By designing the position of the button 11 to fit the angle between the second and first orientations, it is ensured that the button 11 is fully exposed when the detection body 110 is in the second orientation.

[0056] It should be noted that the angle between the second orientation and the first orientation is set to be greater than 18° so that the button 11 has a larger operating space, making it easier for the user to press; the angle between the second orientation and the first orientation is set to be less than 43° so that when the rotation angle of the detection body 110 is too large, the top will interfere with the mounting ring 6, and controlling the rotation angle of the detection body 110 can avoid interference with the mounting ring 6.

[0057] Furthermore, such as Figure 11 As shown, when the detection body 110 is adjusted to the first orientation, the lateral gap between the side of the detection body 110 and the mounting ring 6 is less than 2mm, so that the button 11 is hidden. That is, when the detection body 110 is in the first orientation, the lateral gap is very small, and the user cannot see the button 11 through the gap from below the detection body 110, thus visually hiding the button 11. Furthermore, reducing the lateral gap allows for a larger diameter of the detection body 110, providing sufficient space on the front of the detection body 110 to arrange the sensing module 2 and the lens assembly 32. In an exemplary embodiment, the lateral gap is 0.5mm.

[0058] Because the lateral clearance is very small, the bottom side of the detection body 110 is prone to interference with the mounting ring 6 during rotation. To avoid interference between the detection body 110 and the mounting ring 6, in some embodiments, such as... Figure 11 As shown, the detection body 110 includes a sensing surface 31 facing the sensing area, and the mounting ring 6 has a second surface 62 facing away from the first surface 61. In an exemplary embodiment, when the detection body 110 is in the first orientation, the edge of the sensing surface 31 is recessed into the second surface 62 (e.g., ...). Figure 11(as shown in the figure); in another exemplary embodiment, the edge of the sensing surface 31 is flush with the second surface 62 (not shown in the figure); in yet another exemplary embodiment, the edge of the sensing surface 31 protrudes from the second surface 62 and the protrusion height is less than 4 mm (not shown in the figure).

[0059] This embodiment avoids interference between the bottom side of the detection body 110 and the mounting ring 6 during rotation by controlling the height at which the edge of the sensing surface 31 protrudes from the second surface 62. The edge of the sensing surface 31 can be understood as the junction between the sensing surface 31 and the side surface, such as... Figure 19 As shown, the sensing surface 31 includes a protruding arc surface 311 and a rounded corner surface 312 disposed around the arc surface 311. The rounded corner surface 312 is used to connect the arc surface 311 and the side surface. The edge of the sensing surface 31 can be understood as the part where the rounded corner surface 312 connects with the side surface.

[0060] Furthermore, such as Figure 11 As shown, a hollowed-out area 63 is provided between the inner side of the mounting ring 6 and the side of the detection body 110. The hollowed-out area 63 hollows out the upper inner part of the mounting ring 6 to avoid interference between the detection body 110 and the mounting ring 6 during rotation, thereby making the gap between the lower part of the mounting ring 6 and the side of the detection body 110 smaller, which is beneficial for hiding the button 11.

[0061] In some embodiments, such as Figure 4 and Figure 5 As shown, the mounting assembly 120 includes two connecting portions 7 extending from the mounting ring 6 and spring claws 8 disposed at the ends of the connecting portions 7. The detection body 110 is rotatably connected to the connecting portions 7 on both sides; wherein, the connecting portions 7 extend upward from both sides of the mounting ring 6, and the spring claws 8 are connected to the top of the connecting portions 7. Figure 2 As shown, the mounting assembly 120 is adapted to be embedded in the ceiling panel 200. When the mounting assembly 120 is installed on the ceiling panel 200, the first surface 61 of the mounting ring 6 is in contact with the lower surface of the ceiling panel 200, and the spring claw 8 abuts against the upper surface of the ceiling panel 200. Thus, the ceiling panel 200 is clamped between the spring claw 8 and the mounting ring 6, allowing the detection device 100 to be mounted on the ceiling panel 200 in a ceiling-mounted manner. The detection body 110 protrudes from the mounting surface 210 with a relatively thin thickness, thus minimizing the visual presence of the detection device 100.

[0062] like Figure 1 and Figure 2As shown, the ceiling panel 200 has a mounting hole 220. The outer diameter of the mounting ring 6 is larger than the diameter of the mounting hole 220, and the inner diameter of the mounting ring 6 is smaller than the diameter of the mounting hole 220. When installing the detection device 100, the user needs to first bend the two spring clips upward so that the spring clips 8 can pass through the mounting hole 220. After the spring clips 8 pass through the mounting hole 220, they spring back and abut against the upper surface of the ceiling panel 200. The detection device 100 moves upward under the elastic force of the spring clips 8 until the mounting ring 6 is attached to the lower surface of the ceiling panel 200. At this time, the ceiling panel 200 is clamped between the spring clips 8 and the mounting ring 6, and the installation is completed.

[0063] Among them, Figure 2 In the middle, the ceiling panel 200 is shown in cross-section, while the testing device 100 is not shown in cross-section.

[0064] In some embodiments, such as Figures 5-8 As shown, the connecting part 7 includes an elastic snap-fit ​​arm 71, and the elastic snap-fit ​​arm 71 is provided with a snap-fit ​​shaft 72 protruding inward. The detection body 110 is provided with snap-fit ​​grooves 12 on both sides. The snap-fit ​​shaft 72 is snapped into the snap-fit ​​grooves 12 to realize the rotatable connection between the detection body 110 and the connecting part 7.

[0065] Furthermore, such as Figure 7 As shown, the end of the snap-fit ​​shaft 72 is provided with a first guide slope 721, the normal of the first guide slope 721 being inclined downwards; the snap-fit ​​shaft 72 is snapped into the snap-fit ​​groove 12 from top to bottom, as shown. Figure 8 As shown, the detection body 110 is provided with an anti-detachment step 13 above the snap-fit ​​groove 12 to prevent the snap-fit ​​shaft 72 from detaching upward from the snap-fit ​​groove 12; the anti-detachment step 13 is provided with a second guide slope 131, the normal of the second guide slope 131 being upwardly inclined. The normal of the slope can be understood as a direction radiating outward from the slope and perpendicular to the slope. The downward inclination of the normal of the first guide slope 721 can be understood as the first guide slope 721 being a slope that is wider at the top and narrower at the bottom, and the upward inclination of the normal of the second guide slope 131 can be understood as the second guide slope 131 being a slope that is narrower at the top and wider at the bottom.

[0066] The first guide slope 721 and the second guide slope 131 cooperate to facilitate the engagement of the locking shaft 72 into the locking groove 12. During the process of the locking shaft 72 engaging into the locking groove 12, the first guide slope 721 abuts against the second guide slope 131, causing the elastic locking arm 71 to elastically deform outward. When the locking shaft 72 moves downward to the corresponding position of the locking groove 12, the deformation of the elastic locking arm 71 returns to normal, and the locking shaft 72 engages into the locking groove 12. Under the limiting action of the anti-detachment step 13, the locking shaft 72 cannot detach from the locking groove 12.

[0067] Furthermore, such as Figure 6 As shown, an elastic reinforcing wall 711 is provided at the root position on the outer side of the elastic snap-fit ​​arm 71. The elastic reinforcing wall 711 connects the elastic snap-fit ​​arm 71 and the mounting ring 6, and is used to enhance the rigidity of the elastic snap-fit ​​arm 71 to prevent the snap-fit ​​shaft 72 from disengaging from the snap-fit ​​groove 12.

[0068] Furthermore, such as Figure 7 As shown, the elastic locking arm 71 is provided with a first locking ring 712 around the locking shaft 72, and the first locking ring 712 is provided with a plurality of locking teeth in the circumferential direction; as Figure 8 As shown, a second locking ring 123 is provided around the locking groove 12, and the second locking ring 123 has multiple locking teeth arranged circumferentially. When the locking shaft 72 is engaged in the locking groove 12, the first locking ring 712 and the second locking ring 123 cooperate, causing the detection body 110 to rotate relative to the connecting part 7, generating a locking sensation. This allows the detection body 110 to maintain its current detection direction after rotation, ensuring the detection direction is stable, and maintaining the stability of the detection direction when the user presses the button 11, preventing the detection body 110 from shaking.

[0069] In some embodiments, such as Figure 7 and Figure 8 As shown, the snap-fit ​​shaft 72 is constructed as a hollow shaft with a connecting hole 722 running through it. The snap-fit ​​groove 12 has a blind hole 121 at the corresponding position of the connecting hole 722. A screw (not shown in the figure) can pass through the connecting hole 722 and connect to the blind hole 121. The elastic snap-fit ​​arm 71 is connected to the blind hole 121 in the snap-fit ​​groove by the screw to enhance the connection stability and prevent the snap-fit ​​shaft 72 from disengaging from the snap-fit ​​groove 12 when the button 11 is pressed.

[0070] In some embodiments, such as Figure 6 and Figure 5 As shown, the connecting part 7 further includes a spring limiting part 73, which is used to limit the spring of the spring claw 8. The spring limiting part 73 includes a vertical wall 731 extending from the mounting ring 6 and two opposing half-shafts 732 disposed on the top of the vertical wall 731. An installation opening is provided between the two half-shafts 732. The spring of the spring claw 8 is disposed at the end of the spring claw 8 and between the two half-shafts 732. During installation, one end of the spring is first fitted onto one of the half-shafts 732 through the installation opening, and then the spring is compressed so that the other end of the spring is fitted onto the other half-shaft 732. After the spring returns to its original position, both ends will be limited by the insertion of the two half-shafts 732.

[0071] Furthermore, the end of the spring wire is bent downwards and abuts against the inner side of the vertical wall 731 to restrict the spring from rotating circumferentially.

[0072] In some embodiments, such as Figure 6 and Figure 7 As shown, the spring limiting part 73 and the elastic snap-fit ​​arm 71 are separated by a second dividing slit 74.

[0073] Furthermore, the spring limiting part 73 and the elastic snap-fit ​​arm 71 extend independently of each other in the mounting ring 6, so that the deformation of the elastic snap-fit ​​arm 71 will not cause the spring limiting part 73 to deform.

[0074] Furthermore, the upright wall 731 of the spring limiting portion 73 is divided by the second dividing slit 74 to form the elastic snap-fit ​​arm 71 inside the upright wall 731.

[0075] Furthermore, the spring limiting part 73 and the elastic snap-fit ​​arm 71 are integrally formed on the mounting ring 6.

[0076] In some embodiments, such as Figure 5 As shown, the side of the detection body 110 includes at least a first side, a second side, and a third side. The first side and the second side are arranged opposite to each other, and the third side is located between the first side and the second side. The first side and the second side are respectively rotatably connected to the mounting assembly 120. The button 11 is arranged on the third side so that when the detection body 110 is adjusted to the second orientation, the button 11 is exposed.

[0077] Furthermore, the button 11 is positioned in the middle between the first side and the second side, so that when the detection body 110 is adjusted to the second orientation, the button 11 is more exposed, making it easier for the user to press the button 11.

[0078] In some embodiments, such as Figures 13-18 As shown, the detection body 110 includes a sensing cover 3 facing the sensing area. A lens assembly 32 is integrally formed on the back of the sensing cover 3, and the lens assembly 32 includes multiple lens units 321. Because the button 11 is located on the side of the detection body 110, there is no need to place the button 11 on the front of the detection body 110, ensuring the integrity of the sensing cover 3. The lens assembly 32 located on the back of the sensing cover 3 can fully utilize the area of ​​the sensing cover 3, increasing the area of ​​the lens assembly 32, which is beneficial for improving the sensing range and sensing sensitivity. Specifically: The lens assembly 32 includes multiple lens units 321, which can be Fresnel lenses or small convex lenses. Figure 14 , Figure 15 , Figure 17In the illustrated embodiment, the lens unit 321 is configured as a Fresnel lens. Figure 18 In the illustrated embodiment, the lens unit 321 is constructed as a small convex lens. The lens unit 321 is used to focus infrared light onto the pyroelectric sensing element 21 inside the detection body 110. When a human body moves within the sensing area, the lens unit 321 focuses the infrared light generated by the human body onto the pyroelectric sensing element 21. The pyroelectric sensing element 21 responds to changes in infrared light by generating a voltage level change, and the processing module determines that someone is in the sensing area based on this voltage level change. Because the sensing cover 3 does not require a button 11, its integrity is ensured, allowing sufficient space on the back of the sensing cover 3 to house the lens assembly 32. This increases the area of ​​the lens assembly 32, thereby increasing the infrared sensing range. Furthermore, the increased area of ​​the lens assembly 32 allows for the placement of more lens units 321 and / or larger-area lens units 321, thereby improving the sensing resolution and / or sensing distance, and enhancing the sensitivity of the detection device 100.

[0079] In some embodiments, the pyroelectric sensing element 21 employs a quaternary PIR pyroelectric sensor to improve infrared sensing resolution. For example, the pyroelectric sensing element 21 specifically employs a pyroelectric infrared sensor, model L142F7, from Wuxi Ziliang Sensing Technology Co., Ltd.

[0080] In some embodiments, the radar module is a 24GHz radar module. For example, the radar module specifically uses a 24GHz millimeter-wave sensor, model MRS262, from Zhenghe Microchip Technology Co., Ltd.

[0081] Furthermore, the center of the lens assembly 32 is located in the middle region of the sensing cover 3, which helps to increase the area of ​​the lens assembly 32. A first circuit board 4 is disposed inside the detection body 110, and a pyroelectric sensing element 21 is disposed on the first circuit board 4 facing the sensing cover 3. The pyroelectric sensing element 21 is located at the corresponding position of the center of the lens assembly 32. The middle region of the sensing cover 3 can be understood as an area near the center of the sensing cover 3. The center of the lens assembly 32 can be directly opposite to the center of the sensing cover 3, or it can be slightly offset. As long as the center of the lens assembly 32 is located in the area near the center of the sensing cover 3, it is within the protection scope of this utility model.

[0082] In one embodiment, the center of the lens assembly 32 is positioned directly opposite the center of the sensing cover 3, which helps to increase the area of ​​the lens assembly 32.

[0083] In some embodiments, such as Figure 15 , Figure 17 and Figure 18As shown, the coverage area of ​​the lens assembly 32 is greater than 40% of the coverage area of ​​the sensing cover 3 to improve the infrared sensing range. Furthermore, the lens assembly 32 can be provided with a greater number of lens units 321 and / or larger area lens units 321, thereby improving the sensing resolution and / or sensing distance, and thus enhancing the sensitivity of the detection device 100. The coverage area of ​​the lens assembly 32 can be understood as the area of ​​the projected pattern formed by the lens assembly 32 on the plane where the first circuit board 4 is located, and the coverage area of ​​the sensing cover 3 can be understood as the area of ​​the projected pattern formed by the sensing cover 3 on the plane where the first circuit board 4 is located. In an exemplary embodiment, as... Figure 15 As shown, the coverage area of ​​the lens assembly 32 is equal to 55% of the coverage area of ​​the sensor cover 3. In another embodiment, as... Figure 17 As shown, the coverage area of ​​the lens assembly 32 is equal to 55% of the coverage area of ​​the sensor cover 3.

[0084] Furthermore, such as Figure 14 and Figure 18 As shown, the detection body 110 also includes a housing 1, one side of which is open. The sensing cover 3 is placed on the open side of the housing 1. A snap-fit ​​ring 33 is provided on the back of the sensing cover 3. The snap-fit ​​ring 33 is located near the edge of the sensing cover 3 and surrounds the sensing cover 3. The snap-fit ​​ring 33 is embedded in the housing 1. Multiple buckles 331 are arranged at intervals on the outer side of the snap-fit ​​ring 33. The side wall of the housing 1 is provided with corresponding snap-fit ​​positions 141. The buckles 331 snap into the snap-fit ​​positions 141 to fix the sensing cover 3 to the housing 1.

[0085] Furthermore, such as Figure 14 As shown, the sidewall of the outer shell 1 is provided with first positioning ribs 142 on both sides of the button 11. The first positioning ribs 142 extend vertically. The snap ring 33 is provided with a first positioning groove 332 that cooperates with the first positioning ribs 142. When the sensor cover 3 is installed on the outer shell 1, the first positioning ribs 142 are embedded in the first positioning groove 332 to achieve circumferential positioning of the sensor cover 3.

[0086] In addition, the first positioning rib 142 is also used to position the first circuit board 4, such as Figure 22 As shown, a third positioning groove 41 is provided on the edge of the first circuit board 4 at the position corresponding to the first positioning rib 142, and a fourth positioning groove 42 is provided on the side of the first circuit board 4 opposite to the third positioning groove 41. A second positioning rib 143 is provided on the inner wall of the outer shell 1 to cooperate with the fourth positioning groove 42. The first positioning rib 142 is embedded in the third positioning groove 41, and the second positioning rib 143 is embedded in the fourth positioning groove 42, so that the first circuit board 4 is positioned by the outer shell 1.

[0087] Furthermore, the isolation housing 5 is provided with a second positioning groove 53 at the corresponding positions of the first positioning rib 142 and the second positioning rib 143. The first positioning rib 142 and the second positioning rib 143 are respectively embedded in the second positioning groove 53 so that the isolation housing 5 is positioned with the outer shell 1.

[0088] Furthermore, the snap ring 33 is recessed inward at the corresponding position of the button 11 to form a pressing recess 333. The pressing recess 333 is used to provide pressing space for the button 11, so that the button 11 can be pressed smoothly.

[0089] Furthermore, such as Figure 15 As shown, the area enclosed by the snap ring 33 is designated as the lens arrangement area, and the coverage area of ​​the lens assembly 32 is greater than 60% of the coverage area of ​​the lens arrangement area. Figure 15 and Figure 17 In the embodiments shown, the coverage area of ​​the lens assembly 32 is 67% of the coverage area of ​​the lens arrangement area.

[0090] In some embodiments, such as Figure 11 , Figure 13 , Figure 14 As shown, the detection body 110 also has a second circuit board 22 inside, which is disposed on the first circuit board 4. The second circuit board 22 has a radar module 23, and the radar waves generated by the radar module 23 are emitted outward through the sensing cover 3. Furthermore, the second circuit board 22 is mounted on the first circuit board 4 in a raised manner, so that the distance between the radar module 23 and the sensing cover 3 can be adjusted by adjusting the height at which the second circuit board 22 is raised. A reasonable design of the height at which the second circuit board 22 is raised is beneficial to improving the performance of the radar module 23. Specifically: The applicant discovered that the distance L1 between the radar module 23 and the sensor cover 3, and the thickness of the sensor cover 3, have a significant impact on the performance of the radar module 23. This utility model elevates the second circuit board 22, allowing the height of the second circuit board 22 to be adjusted. This enables the obtaining of an optimal L1 value for the performance of the radar module 23 through experimentation, thereby fixing the L1 value and mass-producing the radar module 23 based on this L1 value, thus ensuring the performance of the radar module 23.

[0091] Furthermore, the second circuit board 22 is raised to a height higher than the pyroelectric sensing element 21, which prevents the radar waves emitted by the radar module 23 from being interfered with by the pyroelectric sensing element 21, thereby improving the performance of the radar module 23.

[0092] In some embodiments, the second circuit board 22 can be connected to the first circuit board 4 via a pin header and nut header connection; alternatively, the first circuit board 4 can first support the second circuit board 22 with a bracket, and then use a ribbon cable to achieve electrical connection between the two; or the second circuit board 22 can be directly soldered to the first circuit board 4 using pin headers 221, with the second circuit board 22 supported by the pin headers 221. In an exemplary embodiment, as shown... Figure 11 and Figure 22 As shown, a pin header 221 is soldered to the lower surface of the second circuit board 22. The pin header 221 has a plastic support block. The first circuit board 4 has a socket hole. The pin header 221 is inserted into the socket hole and soldered to the first circuit board 4. The lower surface of the plastic support block abuts against the upper surface of the first circuit board 4. The distance between the second circuit board 22 and the first circuit board 4 is controlled by the plastic support block, so that the distance between the second circuit board 22 and the first circuit board 4 can be kept consistent during mass production, thus ensuring the performance of the radar module 23. In addition, the first circuit board 4 supports and positions the second circuit board 22 through the pin header 221, making the structure more compact and helping to reduce the size of the detection body 110, adapting to the trend of miniaturization.

[0093] exist Figure 18 In the illustrated embodiment, the lens unit 321 is constructed as a small convex lens, i.e., multiple small convex lenses are spliced ​​together to form the lens assembly 32. Because the small convex lenses are thicker at their center and thinner at their edges, the thickness of the lens assembly 32 varies considerably and is difficult to control. Since radar waves pass through the lens assembly 32 and are emitted outwards, the large variation in the thickness of the lens assembly 32 leads to a large variation in the thickness of the sensor cover 3, thereby affecting the detection performance of the radar module 23.

[0094] To address the adverse effects of significant variations in the thickness of the small convex lens on the radar module 23, in some embodiments, such as... Figure 14 , Figure 15 and Figure 17 As shown, the lens unit 321 is constructed as a Fresnel lens. Fresnel lenses are characterized by their ultra-thinness and uniform thickness, making it easy to control the thickness of the sensor cover 3, which is beneficial to improving the performance of the radar module 23.

[0095] The principle of Fresnel lenses is as follows: Figure 16 As shown, the effective refraction of a plano-convex lens occurs on its convex surface. The curvature of this convex surface can be preserved, and non-optically functional material can be removed. The convex surface that produces the optical effect is then segmented into a ring and translated towards the bottom to form concentric ring teeth 322, thus forming a Fresnel lens. A Fresnel lens can be considered a thinned convex lens. As its principle shows, each ring tooth 322 of a Fresnel lens retains the corresponding curvature characteristics of a convex lens, but is much thinner and lighter.

[0096] The lens unit 321 of this embodiment is constructed as a Fresnel lens, which makes the thickness variation of the lens assembly 32 smaller and the thickness easier to control, so that researchers can control the thickness of the lens assembly 32 at an optimal value, thereby improving the detection performance of the radar module 23.

[0097] In an exemplary embodiment, the thickness of the sensor cover 3 in the area where the Fresnel lens is located is 0.55 mm to 0.7 mm.

[0098] Fresnel lenses include equal-pitch Fresnel lenses and equal-height Fresnel lenses. In one embodiment, an equal-pitch Fresnel lens is used. An equal-pitch Fresnel lens can be understood as having equal pitch between two adjacent annular teeth 322, and the annular teeth 322 are evenly spaced. This arrangement is advantageous because it is convenient to design and manufacture, and allows for a larger number of annular teeth 322. In other embodiments, an equal-height Fresnel lens can also be used. An equal-height Fresnel lens can be understood as having equal height between two adjacent annular teeth 322.

[0099] In some embodiments, to reduce the difficulty of processing, the arc surface of the annular tooth 322 of the Fresnel lens can be simplified to a conical surface, but the optical performance of the simplified Fresnel lens is reduced.

[0100] like Figure 9 As shown, the detection body 110 rotates within the mounting ring 6 to adjust its orientation. Since the mounting ring 6 is embedded within the ceiling panel 200, if the radar module 23 is improperly positioned, the radar waves from the detection body 110 may be easily blocked by the mounting ring 6 and the ceiling panel 200 during rotation, resulting in a significant reduction in the detection performance of the radar module 23. For example... Figure 9 As shown, when the detection body 110 is adjusted to the second orientation, the left half of the detection body 110 is located above the mounting ring 6. If the radar module 23 is set in the left half, the radar wave emitted by the radar module 23 is easily blocked by the mounting ring 6 and the ceiling plate 200.

[0101] To avoid the above situation, in some embodiments, such as Figure 11 As shown, where, Figure 11 For the detection device 100 in Figure 9 The cross-sectional view shown. The side of the detection body 110 includes a third side where the button 11 is disposed; the second circuit board 22 is disposed off-center from the first circuit board 4, and the second circuit board 22 is located between the center of the first circuit board 4 and the third side; as shown Figure 7 and Figure 8As shown, a limiting structure 75 is provided at the part where the detection body 110 is connected to the mounting assembly 120. The limiting structure 75 can limit the rotation angle of the detection body 110 toward the third side to be less than 15°.

[0102] That is, in Figure 11 In this configuration, the limiting structure 75 restricts the counterclockwise rotation angle of the detection body 110 to no more than 15°, positioning the radar module 23 on the side of the detection body 110 biased towards the button 11. This prevents the radar module 23 from rotating above the mounting ring 6, thus avoiding radar wave obstruction. Furthermore, the detection body 110 can rotate a relatively large angle (at least 30°) towards the side away from the button 11. Figure 11 The detection body 110 can rotate clockwise by a large angle, ensuring a large angle adjustment range for the detection device 100. In addition, the detection body 110 can rotate by a large angle toward the side away from the button 11, so that the limiting structure 75 does not restrict the exposure of the button 11, ensuring that the button 11 can be pressed.

[0103] Furthermore, such as Figure 7 As shown, a limiting notch 751 is provided at the bottom of the snap-fit ​​shaft 72. The limiting notch 751 extends along the axial direction of the snap-fit ​​shaft 72, and the limiting notch 751 constitutes the limiting structure 75. Figure 8 and Figure 9 As shown, a limiting protrusion 122 is provided inside the snap-fit ​​groove 12. The limiting protrusion 122 is located at the bottom of the snap-fit ​​groove 12 and extends along the axial direction of the snap-fit ​​groove 12. When the snap-fit ​​shaft 72 is snapped into the snap-fit ​​groove 12, the limiting protrusion 122 is embedded in the limiting notch 751. During the rotation of the detection body 110, the two sides of the limiting protrusion 122 abut against the two sides of the limiting notch 751 in sequence to limit the rotation angle of the detection body 110.

[0104] In other embodiments, such as Figure 10 As shown, this embodiment is similar to Figure 9 The difference in the illustrated embodiment is that the detection body 110 can rotate to a 35° angle towards both the third and fourth sides, with the fourth side opposite to the third side. In this embodiment, the width of the limiting protrusion 122 is narrowed, allowing it to move more freely within the limiting notch 751. This relaxes the restriction on the rotation angle of the detection body 110 imposed by the limiting structure 75, enabling the detection body 110 to rotate to a 35° angle towards both the third and fourth sides. Furthermore, to prevent the radar module 23 from rotating above the mounting ring 6 and causing radar wave obstruction, a warning message is printed on the lower surface of the mounting ring 6 in this embodiment, reminding the user that the rotation angle towards the third side should not be too large.

[0105] In some embodiments, such as Figure 11 As shown, the bottom of the outer casing 1 is open, and the sensor cover 3 is placed on the bottom of the outer casing 1 to form a receiving cavity with the outer casing 1. The first circuit board 4 and the second circuit board 22 are housed in the receiving cavity.

[0106] In some embodiments, such as Figure 11 and Figure 22 As shown, a first circuit board 4 is disposed inside the detection body 110, with the first circuit board 4 facing the sensing area. An electronic switch 43 is disposed on the edge of the first circuit board 4 at the position corresponding to the button 11. The trigger rod of the electronic switch 43 can be pressed to trigger the electronic switch 43. The trigger rod protrudes laterally from the first circuit board 4, and the button 11 abuts against the trigger rod. The trigger rod of the button 11 protrudes laterally from the first circuit board 4 to adapt to the button 11 located on the side of the detection body 110, thereby improving the pressing feel of the button 11.

[0107] Furthermore, such as Figure 23 As shown, the detection body 110 includes a housing 1, and the button 11 is integrally formed on the housing 1. The sidewall of the housing 1 is divided by a dividing slit 15, with three sides of the dividing slit 15 connected to form the button 11 within the area enclosed by the dividing slit 15. A connecting arm is formed on the non-connected side of the dividing slit 15, and the button 11 is integrally connected to the sidewall of the housing 1 via the connecting arm. Figure 11 As shown, a trigger post extends from the back of the button 11, and the trigger post abuts against the trigger rod of the electronic switch 43 to reduce the travel of the button 11 in triggering the electronic switch 43. Since the button 11 relies on the deformation of the connecting arm to generate a restoring force, reducing the pressing travel helps to reduce the pressing force required to trigger the electronic switch 43. When the button 11 is pressed, reducing the pressing force can prevent the detection body 110 from rotating under the pressing force, which is more suitable for the retractable button 11 provided by this utility model.

[0108] In some embodiments, this embodiment is not shown in the accompanying drawings. The difference from the previous embodiment is that the detection body 110 provided in this embodiment only has radar detection function and does not have infrared sensing function. The pyroelectric sensing element 21 is not provided inside the detection body 110, and the lens assembly 32 is not provided on the back of the sensing cover 3. A second circuit board 22 is provided inside the detection body 110, and a radar module 23 is provided on the second circuit board 22 facing the sensing area. The detection body 110 only relies on the radar module 23 to detect the presence of a human body. Further, the sensing cover 3 is placed on the bottom of the outer shell 1, forming a receiving cavity with the outer shell 1. The second circuit board 22 is housed in the receiving cavity; the radar module 23 is located at the center of the sensing cover 3.

[0109] In the existing technology, the infrared sensing module and the radar module of the detection device are arranged side by side without interference. This results in the front of the detection device being divided into an infrared sensing surface and a radar sensing surface. The infrared sensing surface and the radar sensing surface are distributed independently on the front of the detection device. The space on the front of the detection device is limited, and the area occupied by both is relatively small. This design is not only not conducive to the miniaturization of the detection device, but also affects the detection performance of the detection device.

[0110] To address the above problems, in some embodiments, such as Figures 1-25 As shown, the detection device 100 includes: a housing 1; a sensing cover 3, which covers one open side of the housing 1, and a lens assembly 32 integrally formed on the inner surface of the sensing cover 3; a pyroelectric sensing element 21, disposed inside the housing 1, with an infrared receiving surface 211 facing the lens assembly 32 for receiving infrared light; and a radar module 23, disposed inside the housing 1, with a transmitting antenna 231 and a receiving antenna 232 facing the sensing cover 3; wherein, as... Figure 11 and Figure 14 As shown, the transmitting antenna 231 and the receiving antenna 232 are located within the coverage area of ​​the lens assembly 32, so that the radar waves generated by the radar module 23 pass through the lens assembly 32 and are transmitted outward.

[0111] This invention innovatively places the transmitting antenna 231 and receiving antenna 232 of the radar module 23 within the coverage area of ​​the lens assembly 32, so that the infrared sensing surface and the radar sensing surface overlap and are distributed on the front of the detection device 100. Both the infrared sensing surface and the radar sensing surface can occupy a large area of ​​the sensing cover 3, thereby increasing the area of ​​the lens assembly 32 and improving the infrared sensing sensitivity. Furthermore, thanks to the overlap of the infrared sensing surface and the radar sensing surface, both have a large area ratio, allowing the detection device 100 to further reduce its size while meeting detection performance requirements, achieving miniaturization.

[0112] The outer casing 1 has at least one open side. In an exemplary embodiment, the bottom of the outer casing 1 is open to form the open side. The sensing cover is disposed on the open side, and the sensing cover and the outer casing form a receiving cavity.

[0113] The infrared sensing surface can be understood as the surface formed by the sensing cover 3 in the corresponding area of ​​the lens assembly 32, and the radar sensing surface can be understood as the surface formed by the sensing cover 3 in the area through which radar waves pass.

[0114] The lens assembly 32 is composed of multiple lens units 321, which can be Fresnel lenses or small convex lenses. Figure 14 , Figure 15 and Figure 17 In the illustrated embodiment, the lens unit 321 is configured as a Fresnel lens. Figure 18 In the illustrated embodiment, the lens unit 321 is configured as a small convex lens. Figure 18 In the illustrated embodiment, multiple small convex lenses are spliced ​​together to form the lens assembly 32. Because the small convex lenses are thicker at their centers and thinner at their edges, the thickness of the lens assembly 32 varies considerably and is difficult to control. Since radar waves pass through the lens assembly 32 and are emitted outwards, a large variation in the thickness of the lens assembly 32 will lead to a large variation in the thickness of the sensor cover 3, thereby affecting the performance of the radar module 23.

[0115] To reduce the impact of the lens assembly 32 on the performance of the radar module 23, in a preferred embodiment of this invention, such as... Figures 14-16 As shown, the lens unit 321 includes multiple concentric annular teeth 322 to allow the lens assembly 32 to adapt to the passage of radar waves. Further, the lens unit 321 is constructed as a Fresnel lens. The technical details of the Fresnel lens have been described in detail above and will not be repeated here. A Fresnel lens can be considered a thinned convex lens. As its principle shows, each annular tooth 322 of a Fresnel lens retains the corresponding curvature characteristics of a convex lens, but is thinner and lighter. This invention constructs the lens unit 321 as a Fresnel lens, resulting in smaller thickness variations and easier thickness control for the lens assembly 32. This allows researchers to control the thickness of the lens assembly 32 at an optimal value, thereby avoiding any impact on the performance of the radar module 23. This makes the lens assembly 32 more suitable for the structure provided by this invention, which places the transmitting antenna 231 and the receiving antenna 232 within the coverage area of ​​the lens assembly 32.

[0116] Thanks to the overlapping distribution of the infrared sensing surface and the radar sensing surface on the front of the detection device 100, the lens assembly 32 can occupy a large area of ​​the sensing cover 3. In some embodiments, the coverage area of ​​the lens assembly 32 is greater than 40% of the coverage area of ​​the sensing cover 3. In an exemplary embodiment, as shown... Figure 15 As shown, the coverage area of ​​the lens assembly 32 is equal to 55% of the coverage area of ​​the sensor cover 3. In another embodiment, as... Figure 17 As shown, the coverage area of ​​the lens assembly 32 is equal to 55% of the coverage area of ​​the sensor cover 3.

[0117] In some embodiments, such as Figure 15 and Figure 17As shown, the annular teeth 322 located in the same lens unit 321 are arranged in layers surrounding each other from the inside out, and the number of layers of the annular teeth 322 is greater than or equal to 4. Among them, by Figure 16 It is known that the more layers of the annular teeth 322, the smaller the thickness variation of the lens unit 321, but the higher the requirements for processing precision. This utility model designs the number of layers of the annular teeth 322 to be greater than 4 layers in order to reduce the thickness variation of the lens unit 321, so that the lens assembly 32 has less impact on the performance of the radar module 23.

[0118] In one embodiment, such as Figure 15 As shown, the lens assembly 32 includes a centrally located first lens unit 321, eight second lens units 321 surrounding the first lens unit 321, sixteen third lens units 321 surrounding the second lens units 321, and twenty fourth lens units 321 surrounding the third lens units 321. The eight second lens units 321 are evenly distributed circumferentially and joined together to form a ring; the sixteen third lens units 321 are evenly distributed circumferentially and joined together to form a ring; and the twenty fourth lens units 321 are evenly distributed circumferentially and joined together to form a ring. The periphery of the first lens unit 321 is joined with the eight second lens units 321; the periphery of the eight second lens units 321 is joined with the sixteen third lens units 321; and the periphery of the sixteen third lens units 321 is joined with the twenty fourth lens units 321.

[0119] Furthermore, such as Figure 15 As shown, the center of the annular teeth of the first lens unit 321 is located at the center of the first lens unit 321, while the centers of the annular teeth of the second lens unit 321, the third lens unit 321 and the fourth lens unit 321 are located on the side of their respective lens units 321 away from the center of the lens assembly 32.

[0120] In another embodiment, such as Figure 17 As shown, this embodiment is similar to Figure 15The difference in the illustrated embodiment is that the lens assembly 32 includes a centrally located first lens unit 321, eight second lens units 321 surrounding the first lens unit 321, twelve third lens units 321 surrounding the second lens units 321, and sixteen fourth lens units 321 surrounding the third lens units 321. The eight second lens units 321 are evenly distributed circumferentially and joined together to form a ring; the twelve third lens units 321 are evenly distributed circumferentially and joined together to form a ring; and the sixteen fourth lens units 321 are evenly distributed circumferentially and joined together to form a ring. The periphery of the first lens unit 321 is joined with six second lens units 321; the periphery of the six second lens units 321 is joined with the twelve third lens units 321; and the periphery of the twelve third lens units 321 is joined with the sixteen fourth lens units 321.

[0121] Furthermore, such as Figure 17 As shown, the center of the annular teeth of the first lens unit 321 is located at the center of the first lens unit 321, the centers of the annular teeth of the second lens unit 321 and the third lens unit 321 are located on the side of their respective lens units 321 away from the center of the lens assembly 32, and the center of the annular teeth of the third lens unit 321 is located on the side of the first lens unit 321 closer to the center of the lens assembly 32.

[0122] In some embodiments, such as Figure 14 and Figure 21 As shown, the pyroelectric sensing element 21 is disposed at the center of the lens assembly 32, and the radar module 23 is disposed off-center from the center of the lens assembly 32.

[0123] In some embodiments, such as Figure 11 and Figure 19 As shown, the side of the sensing cover 3 facing the sensing area is designated as the sensing surface 31, which is constructed as an outwardly convex arc surface to increase the infrared sensing range.

[0124] Furthermore, the protrusion height of the sensing surface 31 is set to H1, and the diameter of the sensing surface 31 is set to Φ1. Then, Φ1 satisfies the relationship: H1 / Φ1≤0.15, to control the protrusion height of the sensing surface 31 from being too high. For example... Figure 11 As shown, since the radar module 23 is located at a position off from the center of the lens assembly 32, if the height of the protrusion of the sensing surface 31 is higher, the tilt of the sensing surface 31 relative to the radar module 23 will be greater. The wall thickness of the radar wave passing through different positions of the sensing cover 3 will vary greatly, and the distance L1 between the radar module 23 and the sensing cover 3 will also vary greatly, which will affect the performance of the radar module 23.

[0125] Therefore, this utility model controls the height of the protrusion of the sensing surface 31 to reduce the wall thickness difference of radar waves passing through different positions of the sensing cover 3, and makes the distance L1 between the radar module 23 and the sensing cover 3 easier to control, thereby reducing the impact on the radar module 23.

[0126] Among them, such as Figure 19 As shown, the sensing surface 31 includes an arc surface 311 and a rounded corner surface 312 disposed around the arc surface 311. The rounded corner surface 312 is used to connect the arc surface 311 and the side surface.

[0127] In some embodiments, such as Figure 11 As shown, the transmitting antenna 231 is arranged facing a first direction. In the first direction, the distance between the lens assembly 32 and the transmitting antenna 231 is set as L1. L1 satisfies the relationship: 4mm≤L1≤10mm, so as to improve the performance of the radar module 23. In an exemplary embodiment, L1=6mm.

[0128] In some embodiments, such as Figure 11 and Figure 22 As shown, the outer shell 1 and the sensing cover 3 form a receiving cavity. Inside the receiving cavity, a first circuit board 4 supporting the pyroelectric sensing element 21 and a second circuit board 22 supporting the radar module 23 are disposed. The second circuit board 22 is mounted on top of the first circuit board 4. The mounting of the second circuit board 22 allows the distance between the radar module 23 and the sensing cover 3 to be adjusted by changing the height of the second circuit board 22. A well-designed mounting height of the second circuit board 22 is beneficial for improving the performance of the radar module 23. Specific technical details have been described in detail above and will not be repeated here.

[0129] Furthermore, the second circuit board 22 is electrically connected to the first circuit board 4 via a pin header 221. The pin header 221 supports the second circuit board 22. The technical details of the pin header 221 have been described in detail above and will not be repeated here.

[0130] like Figure 11 As shown, in the direction perpendicular to the first circuit board 4, the distance between the second circuit board 22 and the first circuit board 4 is set to L2, where L2 satisfies the relationship: 4mm ≤ L2 ≤ 8mm. Since the housing of the pyroelectric sensing element 21 is made of metal, setting L2 ≥ 4mm avoids interference from the pyroelectric sensing element 21 with radar waves; setting L2 ≤ 8mm avoids the second circuit board 22 blocking the infrared light converged by the lens unit 321, thus reducing the infrared sensing range. In an exemplary embodiment, L2 = 6.1mm.

[0131] Wherein, the direction perpendicular to the first circuit board 4 is parallel to the first direction.

[0132] Furthermore, such as Figure 21 As shown, in the direction parallel to the first circuit board 4, the distance between the second circuit board 22 and the infrared receiving surface 211 is set to L3, where L3 satisfies the relationship: 3mm ≤ L3 ≤ 8mm. Setting L3 to L3 ≥ 3mm avoids the second circuit board 22 blocking the infrared light converged by the lens unit 321, thus reducing the infrared sensing range. Setting L3 ≤ 8mm prevents the radar module 23 from getting too close to the side wall of the housing 1, thus preventing the radar waves emitted by the radar module 23 from being blocked by the housing 1 and the mounting ring 6, which would reduce the radar sensing range. In an exemplary embodiment, L3 = 6mm.

[0133] In some embodiments, such as Figure 21 and Figure 22 As shown, a brightness sensor 222 is provided on the side of the second circuit board 22 facing the sensing cover 3. The brightness sensor 222 is used to sense ambient light. Ambient light shines through the sensing cover 3 onto the brightness sensor 222. The brightness sensor 222 is located on the side of the second circuit board 22 near the pyroelectric sensing element 21 to make the sensing result of the brightness sensor 222 more accurate. Furthermore, the brightness sensor 222 is located in a corner area, that is, the brightness sensor 222 is located in the corner area of ​​the second circuit board 22 on the side near the pyroelectric sensing element 21, to avoid the brightness sensor 222 blocking the infrared light converged by the lens unit 321 and causing a reduction in the infrared sensing range. Here, the corner area can be understood as the outermost corner of the second circuit board.

[0134] Furthermore, the second circuit board 22 has a protrusion on the side facing the pyroelectric sensing element 21, the protrusion being located at a corner of the second circuit board 22, and the brightness sensing element 222 being disposed on the protrusion.

[0135] In one exemplary embodiment, the brightness sensor 222 is a phototransistor.

[0136] In existing top-mounted detection devices, the buttons are typically located on the front of the detection body, allowing the buttons to apply pressure to the electronic switch perpendicular to the low-voltage board. When the electronic switch receives pressure parallel to the low-voltage board, it causes the low-voltage board to shift in a direction parallel to the low-voltage board, resulting in misalignment between the low-voltage board and the high-voltage board, causing unstable connection between them.

[0137] To address the problem that the electronic switch of the detection device in the prior art cannot receive pressing pressure parallel to the weak current plate, in some embodiments, such as Figure 11 , Figure 22 and Figure 24As shown, the detection device 100 includes a housing 1 and a first circuit board 4 disposed inside the housing 1. The first circuit board 4 is provided with a sensing module 2. The first circuit board 4 is divided into a high-voltage area 441 carrying a high-voltage circuit and a low-voltage area 442 carrying a low-voltage circuit. The high-voltage area 441 and the low-voltage area 442 are separated by an insulating area 443. The sensing module 2 is disposed in the low-voltage area 442. An electronic switch 43 is disposed in the low-voltage area 442 of the first circuit board 4. The housing 1 is provided with a button 11 for triggering the electronic switch 43.

[0138] This invention directly mounts the electronic switch 43 onto the high-voltage board, avoiding pressure applied to the low-voltage board. Because the high-voltage board is directly fixed to the outer casing, the electronic switch 43 can receive lateral pressure. This aligns with the invention's placement of the button 11 on the side of the detection body 110, preventing the button 11 from occupying space on the front of the detection body 110 and improving the sensing performance of the detection device 100. Furthermore, thanks to the insulating area 443 separating the high-voltage area 441 and the low-voltage area 442, the low-voltage area 442 is highly safe, and the electronic switch 43 located in the low-voltage area 442 poses no risk of electric shock. The button 11 also simplifies the structure.

[0139] The sensing module 2 includes the pyroelectric sensing element 21, the second circuit board 22, and the radar module 23 disposed on the second circuit board 22. The insulating region 443 can be understood as a non-energized region; for example, the insulating region 443 is a blank area on the first circuit board 4 where no copper plate is covered and no electronic component pins are soldered. In an exemplary embodiment, as... Figure 24 As shown, the low-voltage area 442 and the high-voltage area 441 are represented by dashed boxes. The left dashed box represents the low-voltage area 442, and the right dashed box represents the high-voltage area 441. The area between the left and right dashed boxes is an insulating area 443. The high-voltage area 441 is equipped with a terminal block for connecting to household AC power, while the low-voltage area 442 is equipped with the induction module 2, electronic switch 43, processor, communication unit, etc.

[0140] In some embodiments, such as Figure 23 As shown, the sidewall of the outer casing 1 is divided by a dividing slit 15. Three sides of the dividing slit 15 are connected to form the button 11 within the area enclosed by the dividing slit 15. A connecting arm is formed on the non-connected side of the dividing slit 15. The button 11 is integrally connected to the sidewall of the outer casing 1 via the connecting arm. Thanks to the insulating region 443 separating the high-voltage region 441 and the low-voltage region 442, there is no risk of electric shock in the low-voltage region 442. Therefore, creepage distance does not need to be considered when designing the button 11, allowing the button 11 to be formed by the dividing slit 15.

[0141] Furthermore, the three interconnected sides of the dividing slit 15 form a 270° arc shape to form a circular button 11 inside the dividing slit 15.

[0142] In some embodiments, a transformer 45 spans the insulation region 443, with one end of the transformer 45 welded to the high-voltage region 441 and the other end welded to the low-voltage region 442.

[0143] Furthermore, such as Figure 24 As shown, the distance between the high-voltage area 441 and the low-voltage area 442 is greater than or equal to 3mm, so as to achieve electrical isolation between the high-voltage area 441 and the low-voltage area 442 and eliminate the risk of electric shock in the low-voltage area 442.

[0144] In some embodiments, such as Figure 22 and Figure 11 As shown, the electronic switch 43 is located at the edge of the first circuit board 4, and the trigger rod of the electronic switch 43 protrudes laterally from the first circuit board 4. The button 11 presses the trigger rod laterally to trigger the electronic switch 43. Because the electronic switch 43 is located on the power board, which is fixedly installed on the outer casing 1, the electronic switch 43 can receive lateral pressing pressure. In this embodiment of the invention, the button 11 is located on the side of the detection body 110, so the button 11 does not occupy the space on the front of the detection body 110, and the sensing performance of the detection device 100 is not affected.

[0145] In some embodiments, such as Figure 14 As shown, a Fresnel lens is integrally formed on the inner surface of the sensing cover 3; the sensing module 2 includes a pyroelectric sensing element 21, which is disposed on the side of the first circuit board 4 facing the sensing cover 3. In this invention, the electronic switch 43 is placed on the high-voltage board, allowing it to receive lateral pressing pressure. This is compatible with placing the button 11 on the side of the detection body 110, thus ensuring the integrity of the sensing cover 3 and providing sufficient space for the lens assembly 32 to improve the sensing performance of the pyroelectric sensing element 21.

[0146] In some embodiments, the housing 1 is injection molded from PC material, which has good flame-retardant properties. Since the Fresnel lens is integrally molded onto the sensor cover 3, to ensure the optical performance of the Fresnel lens, the sensor cover 3 is injection molded from HDPE material. However, HDPE material has poor flame-retardant properties; if the sensor cover 3 burns, it will damage the first circuit board 4. To improve the fire resistance of the detection device 100, such as... Figure 13 and Figure 14As shown, an isolation housing 5 is provided between the sensing cover 3 and the first circuit board 4. The isolation housing 5 includes a cutout portion 51 and a shielding portion. The shielding portion shields the high-voltage area 441 of the first circuit board 4, while the cutout portion 51 exposes at least a portion of the low-voltage area 442. Specifically, the isolation housing 5 shields the high-voltage area 441 of the first circuit board 4 to prevent it from being burned. The cutout portion 51 exposes at least a portion of the low-voltage area 442 to ensure the normal operation of the sensing module 2.

[0147] Furthermore, the sensing module 2 also includes a radar module 23, and the hollow portion 51 of the isolation housing 5 exposes the radar module 23 and the pyroelectric sensing element 21 to ensure that the radar module 23 and the pyroelectric sensing element 21 work normally.

[0148] Furthermore, such as Figure 11 As shown, the distance between the radar module 23 and the first circuit board 4 is greater than the distance between the isolation housing 5 and the first circuit board 4, meaning the radar module 23 is located outside the isolation housing 5, resulting in better sensing performance of the radar module 23. Furthermore, the radar module 23 is mounted on a second circuit board 22, which is mounted on top of the first circuit board 4, and the distance between the second circuit board 22 and the first circuit board 4 is greater than the distance between the isolation housing 5 and the first circuit board 4.

[0149] Furthermore, such as Figure 14 and Figure 20 As shown, the hollowed-out portion 51 includes a circular hole slightly larger than the pyroelectric sensing element 21 and a square hole slightly larger than the second circuit board 22. The circular hole is positioned corresponding to the pyroelectric sensing element 21, and the square hole is positioned corresponding to the second circuit board 22. The circular hole is connected to the square hole.

[0150] like Figure 21 As shown, the communication unit includes an antenna 46, which is disposed near the edge of the first circuit board 4. The isolation housing 5 is cut off at the corresponding position of the antenna 46 to avoid the isolation housing 5 from blocking the antenna 46.

[0151] like Figure 13 , Figure 20 and Figure 22 As shown, the isolation housing 5 has four first through holes 52 distributed near the edge. The first circuit board 4 has a second through hole 47 at the corresponding position of the first through hole 52. The outer shell 1 has a threaded connecting post 19 at the position directly opposite the second through hole 47. Four second screws 471 pass through the first through hole 52 and the second through hole 47 respectively and are connected to the threaded connecting post 19, so that the second screws 471 fix the isolation housing 5 and the first circuit board 4 to the outer shell 1.

[0152] In some embodiments, the isolation housing 5 is made of a flame-retardant material with a melting point higher than that of the sensing cover 3, to improve the fire resistance of the detection device 100. In an exemplary embodiment, the isolation housing 5 is made of PC (polycarbonate) material, and the sensing cover 3 is made of HDPE (high-density polyethylene) material.

[0153] In some embodiments, a light-emitting unit 49 is provided on the first circuit board 4. The light-emitting unit 49 is located within the area covered by the isolation housing 5, and the light emitted by the light-emitting unit 49 passes through the isolation housing 5 and the sensor cover 3 and is transmitted to the outside. The isolation housing 5 is made of white semi-transparent PC material to facilitate the passage of light.

[0154] In some embodiments, such as Figure 24 and Figure 25 As shown, the first circuit board 4 is provided with a connector 48 for connecting to high-voltage electricity. The connector 48 includes a pressing part 481, and the housing 1 extends an extension arm 161 that covers the pressing part 481. The extension arm 161 can be pressed to press against the pressing part 481. The user can increase the safety of the wiring by pressing the extension arm 161 to press against the pressing part 481.

[0155] Furthermore, such as Figure 25 As shown, the connector 48 also includes insertion holes 482 corresponding to the pressing parts 481. When the pressing parts 481 are pressed down, external wires can be inserted into or pulled out of the insertion holes 482. When the pressing parts 481 are released, the external wires are confined in the insertion holes 482. The connector 48 includes a connector housing, inside which a curved conductive spring 483 is disposed. The end of the conductive spring 483 is located below the insertion holes 482. The pressing parts 481 are columnar, and the bottom of the pressing parts 481 abuts against the conductive spring 483. When the pressing part 481 is pressed down, the end of the conductive spring 483 rotates downward, and the gap between the conductive spring 483 and the inner wall of the wiring housing 485 increases. At this time, the external wire can be inserted into the insertion hole 482. After the external wire is inserted into the insertion hole 482, the pressing part 481 springs up, and the external wire is clamped between the conductive spring 483 and the inner wall of the wiring housing 485. When the pressing part 481 is pressed down again, the gap between the conductive spring 483 and the inner wall of the wiring housing 485 increases, the external wire is no longer clamped by the conductive spring 483, and the external wire can be pulled out of the insertion hole 482.

[0156] like Figure 25As shown, the extension arm 161 extends in a second direction, and the insertion hole 482 is located on the side of the pressing part 481 facing the second direction. The connector 48 has a first hole 484 on the side of the pressing part 481 opposite to the second direction, and the first hole 484 is located within the coverage area of ​​the extension arm 161. Further, the connector 48 is located on the side of the first circuit board 4 opposite to the sensing module 2, and the housing 1 has an operation hole that exposes the insertion hole 482, allowing external wires to be inserted into it. The connector 48 is configured as a terminal block, and the pressing part 481 is configured as a columnar structure protruding from the surface of the terminal block. The terminal block includes a conductive spring 483, and the first hole 484 communicates with the conductive spring 483. A portion of the conductive spring 483 is located below the first hole 484, and the extension arm 161 covers the first hole 484, preventing the user from contacting it and improving wiring safety.

[0157] Furthermore, such as Figure 23 and Figure 25 As shown, the top of the outer casing 1 extends downward to form a surrounding wall 162, which surrounds the connector 48, and the upper end of the connector 48 is embedded in the surrounding wall 162.

[0158] To increase the angle adjustment range of the detection device, such as Figure 2 and Figures 4-9 As shown, the detection device 100 provided by this utility model includes a detection body 110 and an installation assembly 120. The installation assembly 120 includes an installation ring 6 surrounding the detection body 110, connecting portions 7 extending upward from both sides of the installation ring 6, and spring claws 8 disposed at the ends of the connecting portions 7. The two sides of the detection body 110 are respectively rotatably connected to the connecting portions 7, and the detection body 110 is provided with a first avoidance portion 171 for avoiding the spring claws 8. The detection device 100 provided by this utility model is suitable for installation on a ceiling panel 200. The ceiling panel 200 has an installation hole 220. The connecting portion 7 is embedded in the installation hole 220. The installation ring 6 is attached to the lower surface of the ceiling panel 200, and the spring claws 8 abut against the upper surface of the ceiling panel 200. The installation ring 6 can rotate horizontally around the installation hole 220. The detection body 110 rotates vertically relative to the mounting ring 6, and in conjunction with the horizontal rotation of the mounting ring 6, the detection body 110 can adjust the detection direction within a conical space, thereby increasing the angle adjustment range of the detection device 100.

[0159] It is worth noting that the upper part of the detection body 110 is provided with the first avoidance part 171 to avoid the spring claw 8. While ensuring that the spring claw 8 can be inserted into the mounting hole 220, the diameter of the lower part of the detection body 110 can be maximized, so that the lower part of the detection body 110 has enough space to accommodate the pyroelectric sensing element 21 and the radar module 23, and the area of ​​the lens assembly 32 can also be larger, which is beneficial to improving the detection performance of the detection device 100.

[0160] Furthermore, such as Figure 5 and Figure 9 As shown, the side of the detection body 110 includes a first side and a second side arranged opposite to each other, as well as a third side and a fourth side arranged opposite to each other, wherein the direction of the first side toward the second side is perpendicular to the direction of the third side toward the fourth side; The first and second sides are rotatably connected to the connecting portion 7, allowing the detection body 110 to rotate based on the connecting portion 7, thereby adjusting the orientation of the detection body 110; the first and second sides are respectively provided with a first clearance portion 171, and the third and fourth sides are respectively provided with a second clearance portion 172 for clearance of the mounting ring 6. Figure 9 As shown, when the detection body 110 rotates in the vertical direction, the upper part of the detection body 110 is prone to colliding with the mounting ring 6. The second avoidance part 172 creates an avoidance space for the upper part of the detection body 110, thereby making the detection body 110 rotate at a larger angle in the vertical direction and increasing the angle adjustment range of the detection device 100.

[0161] The first clearance portion 171 and the second clearance portion 172 may be recessed, chamfered, or other inwardly contracting structures.

[0162] In one embodiment, such as Figure 5 As shown, the outer shell 1 includes a lower shell 18 and an upper shell 17. The lower shell 18 is cylindrical. The two sides of the lower shell 18 are connected to the connecting part 7. The upper shell 17 is square-column shaped. The side of the square-column shape is inwardly tapered compared to the side of the cylindrical shape. The side of the square-column shape forms the first clearance part 171.

[0163] Furthermore, the first and second sides of the square column are contracted inward relative to the cylindrical shape to form the first clearance portion 171, and the third and fourth sides of the square column are contracted inward relative to the cylindrical shape to form the second clearance portion 172.

[0164] In some embodiments, such as Figure 9As shown, a button 11 is provided on the third side of the detection body 110. When the detection body 110 is adjusted to face the vertical direction, the button 11 is hidden; when the orientation of the detection body 110 is adjusted to be biased towards the fourth side, the button 11 is exposed. Thanks to the first clearance portion 171 and the second clearance portion 172 provided on the upper part of the detection body 110, the diameter of the lower part of the detection body 110 can be maximized, thereby controlling the gap between the detection body 110 and the mounting ring 6 to be very small, thus facilitating the concealment of the button 11.

[0165] Furthermore, such as Figure 11 and Figure 12 As shown, the detection body 110 also includes a sensing cover 3 and a first circuit board 4. The bottom of the outer shell 1 is open, and the sensing cover 3 covers the bottom of the outer shell 1, forming a receiving cavity with the outer shell 1. The first circuit board 4 is housed in the receiving cavity. The first circuit board 4 is disposed within the lower shell 18, and at least part of the electronic components located on the upper surface of the first circuit board 4 are housed within the upper shell 17. The placement of the first circuit board 4 within the lower shell 18 increases its area, providing ample space for the sensing module 2. A power module and terminals are provided on the upper surface of the first circuit board 4. The terminals are used to connect to high-voltage electricity, and the power module converts the high-voltage electricity into low-voltage electricity. Parts of the terminals and parts of the power module are located inside the upper shell 17.

[0166] Furthermore, such as Figure 11 As shown, a sensing module 2 is disposed on the lower surface of the first circuit board 4. The technical details of the sensing module 2 have been described in detail above and will not be repeated here.

[0167] Existing top-mounted human body sensors typically contain a low-voltage board and a high-voltage board. The high-voltage board is fixedly connected to the outer casing, while the low-voltage board is supported by it. An electronic switch is located on the front of the low-voltage board, receiving pressure perpendicular to the board. A button is generally located on the front of the sensor body so that it applies pressure perpendicular to the low-voltage board to the electronic switch. When the electronic switch receives pressure parallel to the low-voltage board, it causes the board to shift in a direction parallel to the board, leading to misalignment between the low-voltage and high-voltage boards and unstable connection between them. Therefore, the button is generally not located on the side of the sensor body to avoid the electronic switch receiving pressure parallel to the board. However, placing the button on the front of the sensor body occupies frontal space and affects the sensor's sensing performance.

[0168] To address the problem that the electronic switch of the existing detection device cannot receive pressing pressure parallel to the low-voltage board, according to the second aspect of this utility model, please refer to... Figures 1-25 A detection device 100 is provided, wherein the structure of the detection device 100 is the same as that of the detection device 100 provided in the first aspect of this utility model, and the technical details of its structure can be referred to the above description. Figure 11 , Figure 22 and Figure 24 As shown, the detection device 100 includes a housing 1 and a first circuit board 4 disposed inside the housing 1. The first circuit board 4 is provided with a sensing module 2. The first circuit board 4 is divided into a high-voltage area 441 carrying a high-voltage circuit and a low-voltage area 442 carrying a low-voltage circuit. The high-voltage area 441 and the low-voltage area 442 are separated by an insulating area 443. The sensing module 2 is disposed in the low-voltage area 442. An electronic switch 43 is disposed in the low-voltage area 442 of the first circuit board 4. The housing 1 is provided with a button 11 for triggering the electronic switch 43.

[0169] This invention directly mounts the electronic switch 43 onto the high-voltage board, avoiding pressure applied to the low-voltage board. Because the high-voltage board is directly fixed to the outer casing, the electronic switch 43 can receive lateral pressure. This aligns with the invention's placement of the button 11 on the side of the detection body 110, preventing the button 11 from occupying space on the front of the detection body 110 and improving the sensing performance of the detection device 100. Furthermore, thanks to the insulating area 443 separating the high-voltage area 441 and the low-voltage area 442, the low-voltage area 442 is highly safe, and the electronic switch 43 located in the low-voltage area 442 poses no risk of electric shock. The button 11 also simplifies the structure.

[0170] In some embodiments, such as Figure 24 As shown, a transformer 45 spans the insulation region 443, with one end of the transformer 45 welded to the high-voltage region 441 and the other end welded to the low-voltage region 442.

[0171] Furthermore, such as Figure 24 As shown, the distance between the high-voltage region 441 and the low-voltage region 442 is greater than or equal to 3 mm.

[0172] In some embodiments, such as Figure 22 and Figure 11 As shown, the electronic switch 43 is located at the edge of the first circuit board 4, and the trigger rod of the electronic switch 43 protrudes laterally from the first circuit board 4. The button 11 presses the trigger rod laterally to trigger the electronic switch 43.

[0173] Furthermore, such as Figure 23As shown, the side wall of the outer casing 1 is divided by a dividing slit 15, and the three sides of the dividing slit 15 are connected to form the button 11 within the area surrounded by the dividing slit 15. A connecting arm is formed on the side of the dividing slit 15 that is not connected, and the button 11 is integrally connected to the side wall of the outer casing 1 through the connecting arm.

[0174] In some embodiments, such as Figure 14 As shown, one side of the outer casing 1 is open, and a sensing cover 3 is provided on the open side. A Fresnel lens is integrally formed on the inner surface of the sensing cover 3. The sensing module 2 includes a pyroelectric sensing element 21, which is disposed on the side of the first circuit board 4 facing the sensing cover 3.

[0175] Furthermore, such as Figure 13 and Figure 14 As shown, an isolation housing 5 is provided between the sensing cover 3 and the first circuit board 4. The isolation housing 5 includes a hollow part 51 and a blocking part. The blocking part blocks the high-voltage area 441 of the first circuit board 4, and the hollow part 51 exposes at least a part of the low-voltage area 442.

[0176] Furthermore, such as Figure 13 and Figure 14 As shown, the sensing module 2 also includes a radar module 23, and the hollow portion 51 of the isolation housing 5 exposes the radar module 23 and the pyroelectric sensing element 21; the distance between the radar module 23 and the first circuit board 4 is greater than the distance between the isolation housing 5 and the first circuit board 4.

[0177] In some embodiments, the isolation housing 5 is made of a flame-retardant material, and its melting point is higher than that of the induction cover 3.

[0178] In some embodiments, such as Figure 24 and Figure 25 As shown, the first circuit board 4 is provided with a connector 48 for connecting to high voltage. The connector 48 includes a pressing part 481. The housing 1 extends an extension arm 161, which covers the pressing part 481. The extension arm 161 can be pressed to press against the pressing part 481.

[0179] Furthermore, such as Figure 25As shown, the connector 48 also includes a wire insertion hole 482 corresponding to the pressing part 481. When the pressing part 481 is pressed down, an external wire can be inserted into or pulled out of the wire insertion hole 482. When the pressing part 481 is released, the external wire is confined in the wire insertion hole 482. The extension direction of the extension arm 161 is the second direction, and the wire insertion hole 482 is provided on the side of the pressing part 481 facing the second direction. The connector 48 has a first hole 484 on the side of the pressing part 481 away from the second direction, and the first hole 484 is located within the coverage area of ​​the extension arm 161.

[0180] Furthermore, such as Figure 25 As shown, the connector 48 is disposed on the side of the first circuit board 4 facing away from the sensing module 2. The housing 1 has an operation hole to expose the plug hole 482 so that external wires can be inserted into the plug hole 482. The connector 48 is constructed as a terminal block, and the pressing part 481 is constructed as a columnar structure protruding from the surface of the terminal block. The terminal block includes a conductive spring 483, and the first hole 484 communicates with the conductive spring 483.

[0181] It should also be noted that the above embodiments can be combined with each other. For the same or similar concepts or processes, they may not be described again in some embodiments. That is, the technical solutions disclosed in the later (in the order of the text) embodiments should include the technical solutions described in this embodiment and the technical solutions described in all embodiments before this embodiment.

[0182] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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. Such 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 utility model.

Claims

1. A detection device, characterized in that, It includes a housing and a first circuit board disposed inside the housing, the first circuit board being provided with a sensing module; The first circuit board is divided into a high-voltage area carrying high-voltage circuits and a low-voltage area carrying low-voltage circuits. The high-voltage area and the low-voltage area are separated by an insulating area. The sensing module is disposed in the low-voltage area. An electronic switch is provided in the low-voltage area of ​​the first circuit board, and a button for triggering the electronic switch is provided in the housing.

2. The detection device according to claim 1, characterized in that, The distance between the high-voltage area and the low-voltage area is greater than or equal to 3 mm.

3. The detection device according to claim 1, characterized in that, The electronic switch is located at the edge of the first circuit board, and the trigger rod of the electronic switch protrudes laterally from the first circuit board. The button presses the trigger rod laterally to trigger the electronic switch.

4. The detection device according to claim 3, characterized in that, The outer casing sidewall is divided by a slit, the three sides of which are connected to form the button within the area enclosed by the slit. A connecting arm is formed on the non-connected side of the slit, and the button is integrally connected to the outer casing sidewall through the connecting arm.

5. The detection device according to any one of claims 1-4, characterized in that, One side of the housing is open, and a sensing cover is provided on the open side. A Fresnel lens is integrally formed on the inner surface of the sensing cover. The sensing module includes a pyroelectric sensing element, which is disposed on the side of the first circuit board facing the sensing cover.

6. The detection device according to claim 5, characterized in that, An isolation shell is provided between the sensor cover and the first circuit board. The isolation shell includes a hollow part and a blocking part. The blocking part blocks the high-voltage area of ​​the first circuit board, and the hollow part exposes at least a portion of the low-voltage area.

7. The detection device according to claim 6, characterized in that, The sensing module also includes a radar module, and the hollowed-out portion of the isolation housing exposes the radar module and the pyroelectric sensing element; The distance between the radar module and the first circuit board is greater than the distance between the isolation housing and the first circuit board.

8. The detection device according to claim 6, characterized in that, The isolation housing is made of flame-retardant material, and its melting point is higher than that of the induction cover.

9. The detection device according to any one of claims 1-4, characterized in that, The first circuit board is provided with a connector for connecting to high voltage. The connector includes a pressing part, and the housing extends an extension arm that covers the pressing part. The extension arm can be pressed to press against the pressing part.

10. The detection device according to claim 9, characterized in that, The connector also includes a wire insertion hole corresponding to each of the pressing parts. When the pressing part is pressed down, an external wire can be inserted into or pulled out of the wire insertion hole. When the pressing part is released, the external wire is confined in the wire insertion hole. The extension arm extends in a second direction, and the insertion hole is located on the side of the pressing part facing the second direction. The connector has a first hole on the side of the pressing part opposite to the second direction, and the first hole is located within the coverage area of ​​the extension arm; The connector is located on the side of the first circuit board opposite to the sensing module, and the housing has an operation hole to expose the plug hole so that external wires can be inserted into the plug hole. The connector is configured as a terminal block, and the pressing part is configured as a columnar structure protruding from the surface of the terminal block; the terminal block includes a conductive spring, and the first hole communicates with the conductive spring.

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