Human body detection device

Abstract

The utility model provides a human body detection device, which comprises a detection main body and a mounting part, and the mounting part is connected to the detection main body. Wherein the mounting part comprises a first side wall, an abutting structure and at least two elastic arms, and the abutting structure protrudes out of the first side wall; the elastic arm extends out based on the first side wall, and the elastic arm is configured to be an elastic sheet. The human body detection device provided by the utility model is simple and convenient in installation process and is safer.

Description

Technical Field

[0001] This application relates to the field of smart homes, and more particularly to a human body detection device. Background Technology

[0002] As people's living standards improve, the demand for intelligent living is increasing, especially for intelligent detection devices. The detection results of these devices can provide reliable execution basis for terminal devices in intelligent scenarios.

[0003] Existing testing devices are divided into two types: surface-mounted and concealed-mounted. Surface-mounted means that the testing device is directly installed on the underside of the ceiling panel, eliminating the need for mounting holes and simplifying installation. Concealed-mounted means that mounting holes are made in the ceiling panel, and the testing device is embedded within these holes, becoming an integral part of the ceiling panel.

[0004] Traditional human body detection devices typically have spring-loaded claws on both sides of the detection body. During installation, the user needs to bend the spring-loaded claws upwards to the size range of the mounting hole, and then push the detection body upwards into the mounting hole. The spring-loaded claws will spring back downwards and abut against the upper surface of the ceiling panel, so that the human body detection device will not fall off under the elastic force of the spring-loaded claws.

[0005] However, the existing human body detection devices, which are based on spring-loaded claws on both sides, are inconvenient to install. Utility Model Content

[0006] One objective of this invention is to provide a human body detection device. During installation, the elastic arm is constructed as an elastic sheet and extends from the first sidewall. The user can pinch the elastic arm with their fingers to bend and deform it, allowing the elastic arm to be inserted into the external mounting hole. After the elastic arm is inserted into the external mounting hole, it springs open and abuts against the upper edge or sidewall of the external mounting hole. The abutting structure abuts against the lower edge of the external mounting hole, completing the installation. The entire installation process is simple, convenient, and safer.

[0007] Another objective of this invention is to provide a human body detection device, wherein the elastic arm is constructed as an elastic sheet, which occupies very little side space, allowing the mounting portion to be adapted to small-diameter external mounting holes.

[0008] Another objective of this utility model is to provide a human body detection device, wherein when the mounting part is installed in the external mounting hole, the first sidewall is embedded in the external mounting hole, the outer diameter of the first sidewall is slightly smaller than the inner diameter of the external mounting hole, and the first sidewall cooperates with the external mounting hole so that the mounting part and the external mounting hole are positioned in the horizontal direction.

[0009] Another objective of this invention is to provide a human body detection device, wherein the distance between the first sidewall and the detection body is less than 6mm, so as to reduce the radial width of the mounting part and enable the mounting part to be adapted to external mounting holes with smaller diameters.

[0010] Another objective of this invention is to provide a human body detection device in which the distance between the second and third surfaces is less than 5mm, and the detection body is less likely to interfere with the mounting part when rotating based on the connecting screw, thereby making the angle adjustment range of the detection body larger.

[0011] Another objective of this invention is to provide a human body detection device in which an elastic arm protrudes from the outer edge of the abutting structure. When the mounting part is installed in the external mounting hole, the elastic arm can abut against the upper edge of the external mounting hole, greatly reducing the risk of the human body detection device falling.

[0012] Another objective of this invention is to provide a human body detection device in which the extension direction of the elastic arm is tangent to the first side wall, thereby further reducing the side space occupied by the elastic arm so that the mounting part can be adapted to a smaller diameter external mounting hole; at the same time, it also makes the width of the abutment part narrower.

[0013] Another objective of this invention is to provide a human body detection device in which the tightening direction of the connecting screw is the same as the first direction. When the connecting screw is tightened, it will drive the elastic arm to rotate in the first direction, so that the elastic arm remains in an upward state, thereby ensuring that the α angle is large enough and avoiding the first edge from not being able to abut against the upper edge of the external mounting hole due to the α angle being too small.

[0014] Another objective of this invention is to provide a human body detection device in which α is set to 14°≤α≤45°, making the connection between the mounting part and the external mounting hole more stable.

[0015] Another objective of this invention is to provide a human body detection device, wherein L is set to be greater than or equal to 8mm, thereby ensuring that the height of the end of the first edge is greater than the thickness of the ceiling panel, so that the first edge can abut against the upper edge of the external mounting hole, rather than against the side wall of the external mounting hole, thus reducing the risk of falling.

[0016] Another objective of this invention is to provide a human body detection device in which the extension direction of the first edge of one elastic arm is rotated 180° along the central axis of the mounting part and coincides with the extension direction of the first edge of another elastic arm, so that the mounting part is subjected to a balanced abutment force, and the user can rotate the mounting part out of the external mounting hole.

[0017] Another objective of this invention is to provide a human body detection device in which the elastic arm, after being inserted into the external mounting hole, does not fully spring open but is pressed against the external mounting hole and remains in a bent state. Thus, the elastic force of the elastic arm acts on the external mounting hole, making the connection between the mounting part and the external mounting hole more stable.

[0018] Another objective of this invention is to provide a human body detection device, wherein the elastic arm is fitted with a rubber sleeve to increase the friction of the first edge and prevent the human body detection device from falling off; at the same time, during the process of rotating the mounting part from the external mounting hole to remove it, since the direction of the friction force on the elastic arm is biased towards the bending direction of the elastic arm, increasing the friction of the first edge can also prevent the elastic arm from slipping and making it difficult to retract, thereby preventing the mounting part from being difficult to remove; in addition, the rubber sleeve on the elastic arm has the function of preventing hand cuts.

[0019] Another objective of this invention is to provide a human body detection device in which the thickness of the nut of the connecting screw is less than or equal to 2.5 mm, so as to reduce the side space occupied by the nut and make the width of the mounting part in the radial direction narrower, so as to be able to fit the external mounting hole with a smaller diameter.

[0020] Another objective of this invention is to provide a human body detection device, wherein the mounting part is limited to the external mounting hole by abutting, so the mounting part can rotate based on the external mounting hole. In conjunction with the rotational connection between the mounting part and the detection body, the detection body can adjust the detection direction in two rotational degrees of freedom, making the detection direction more accurate.

[0021] Another objective of this invention is to provide a human body detection device, wherein the second edge abuts against the first recessed groove, so that the elastic arm is restricted from rotating by the first recessed groove, thereby preventing the angle α between the first edge and the first surface from changing.

[0022] Another objective of this invention is to provide a human body detection device, wherein when the mounting part is installed in the external mounting hole, the connection part of the second abutting arm and the first abutting arm forms an outwardly protruding corner, which abuts against the side wall of the external mounting hole, resulting in greater abutting pressure and thus a more stable connection between the elastic arm and the external mounting hole.

[0023] Another objective of this invention is to provide a human body detection device, wherein the end of the second abutting arm abuts against the first side wall, and the second abutting arm provides support to the first abutting arm so that the abutting force between the first abutting arm and the external mounting hole is greater, thereby making the connection between the elastic arm and the external mounting hole more stable, thus preventing the human body detection device from falling off.

[0024] Another objective of this invention is to provide a human body detection device in which the anti-detachment arm is bent outward from the upper end of the main arm. When the first abutment arm disengages from the external mounting hole, the anti-detachment arm can be hooked onto the upper edge of the external mounting hole, thereby preventing the human body detection device from falling.

[0025] To achieve at least one of the above objectives, the present invention provides a human body detection device, comprising: a detection body and a mounting part, wherein the mounting part is connected to the detection body; wherein the mounting part includes a first sidewall, an abutment structure and at least two elastic arms, the abutment structure protruding from the first sidewall; the elastic arms extend from the first sidewall and are constructed as elastic sheets.

[0026] In some embodiments, the first sidewall is configured as an annular wall, and the abutment structure is configured as an abutment ring extending outward from the bottom of the first sidewall.

[0027] In some embodiments, the mounting portion is sleeved on the detection body, and the distance between the first sidewall and the detection body is less than 6 mm.

[0028] In some embodiments, the detection body is provided with a first circuit board, and a human body detection module is provided on the first circuit board. The human body detection module can be triggered in response to the presence of a stationary or moving human body in a detection area. The detection body has a second surface facing the detection area, and the mounting part has a third surface facing the detection area. The distance between the second surface and the third surface is less than 5 mm.

[0029] In some embodiments, the elastic arm protrudes beyond the outer edge of the abutment structure; the extension direction of the elastic arm is tangent to the first sidewall, and the compression direction of the elastic arm is lateral.

[0030] In some embodiments, the human body detection device is mounted on an external mounting hole via the mounting portion. The elastic arm has a first edge facing the abutting structure, the first edge abutting against the upper edge of the external mounting hole. The abutting structure has a first surface facing the elastic arm, the first surface abutting against the lower edge of the external mounting hole. The extension direction of the first edge is inclined at an angle α to a first direction based on the plane containing the first surface. The elastic arm includes a connecting end, the connecting end being connected to the mounting portion via a connecting screw, the tightening direction of the connecting screw being in the same direction as the first direction. The angle α satisfies the condition: 14°≤α≤45°. The distance between the end of the first edge and the first surface is set to L, and L is set to be greater than or equal to 8mm.

[0031] In some embodiments, the nut thickness of the connecting screw is less than or equal to 2.5 mm; the mounting part is sleeved on the detection body, the connecting screw passes through the connecting end and the first sidewall and is connected to the detection body, the mounting part can rotate based on the connecting screw, the extension direction of the connecting screw is horizontal, and the mounting part can rotate within the external mounting hole based on the first edge of the elastic arm, so that the detection body can adjust the detection direction within a conical space.

[0032] In some embodiments, the connecting end is provided with a second edge facing the abutting structure, the second edge being parallel to the first surface, and the abutting structure is provided with a first recessed groove at a position corresponding to the second edge, the second edge being accommodated in the first recessed groove, such that the first edge intersects with the first surface; the second edge abuts against the first recessed groove, such that the elastic arm is restricted from rotating by the first recessed groove.

[0033] In some embodiments, there are two elastic arms, which are respectively disposed on both sides of the mounting portion. The first edge of one elastic arm extends in a direction that coincides with the first edge of the other elastic arm after rotating 180° along the central axis of the mounting portion. The elastic arm is fitted with a rubber sleeve.

[0034] In some embodiments, the elastic arm includes a main arm and branch arms extending on both sides of the main arm. The main arm is fixedly connected to the first sidewall by connecting screws. The free ends of the branch arms are bent outward to form a first abutting arm. When the mounting part is installed in the external mounting hole, the first abutting arm abuts against the sidewall of the external mounting hole, and the external mounting hole limits the mounting part under the abutting action of the first abutting arm. The end of the first abutting arm is bent downward to form a second abutting arm. When the mounting part is installed in the external mounting hole, the end of the second abutting arm abuts against the first sidewall, so that the abutting force between the first abutting arm and the external mounting hole is greater. The upper end of the main arm is bent outward to form an anti-detachment arm. The lower end of the main arm abuts against the abutting structure to restrict the rotation of the elastic arm based on the connecting screws.

[0035] 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

[0036] 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.

[0037] Figure 1 This is a schematic diagram of the overall structure of a human body detection device according to one embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall structure of a human body detection device according to one embodiment of the present invention;

[0039] Figure 3 This is an assembly diagram of the detection body and the mounting part according to an embodiment of the present invention;

[0040] Figure 4 This is a cross-sectional view of an embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of a human body detection device installed in an external mounting hole according to an embodiment of the present invention;

[0042] Figure 6 This is a schematic diagram of a human body detection device installed in an external mounting hole according to an embodiment of the present invention;

[0043] Figure 7 This is a top view of an embodiment of the present invention;

[0044] Figure 8 yes Figure 7 A cross-sectional view (AA) of the human body detection device in the embodiment when it is installed in the external mounting hole;

[0045] Figure 9 yes Figure 7 A sectional view of the BB section;

[0046] Figure 10 This is a cross-sectional view of the detection body of an embodiment of the present invention rotated to its limit position;

[0047] Figure 11 This is an exploded view of the detection body according to an embodiment of this utility model;

[0048] Figure 12 This is a schematic diagram of the installation of the first housing, the pressing component, and the first circuit board according to an embodiment of the present invention;

[0049] Figure 13 This is a schematic diagram of the first circuit board structure according to an embodiment of the present invention;

[0050] Figure 14 This is a schematic diagram of the installation of the pressing component according to an embodiment of the present invention;

[0051] Figure 15 This is a schematic diagram of the key cover and the detection body according to an embodiment of the present invention;

[0052] Figure 16 This is a schematic diagram of the overall structure of a human body detection device according to one embodiment of the present invention;

[0053] Figure 17 This is a side view of an embodiment of the present invention;

[0054] Figure 18 This is a schematic diagram of the structure of a human body detection device installed in an external mounting hole according to an embodiment of the present invention;

[0055] Figure 19 This is a schematic diagram of the elastic arm structure according to an embodiment of the present invention. Detailed Implementation

[0056] 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.

[0057] 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.

[0058] In the description of this utility model, unless otherwise expressly specified and limited, the term "connection" and other such terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between 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.

[0059] 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.

[0060] Please see Figures 1-19 This utility model provides a human body detection device, which includes a detection body 1 and a mounting part 2 connected to the detection body 1. The mounting part includes a first sidewall 21, an abutment structure 22, and at least two elastic arms 23. The mounting part 2 can be fixedly connected to the detection body 1 or movably connected to it. The human body detection device is adapted to be installed in an external mounting hole 41 via the mounting part 2. The external mounting hole 41 can be understood as a through hole in a ceiling panel 4, allowing the human body detection device to be concealed on the ceiling panel 4.

[0061] In some embodiments, such as Figures 1-7 as well as Figures 16-19 As shown, the abutting structure 22 protrudes from the first sidewall 21; the elastic arm 23 extends from the first sidewall 21, and the elastic arm 23 is constructed as an elastic sheet. The elastic sheet can be a metal sheet, a plastic sheet, or a sheet of other materials; in one embodiment, the elastic sheet is a steel sheet. The diameter of the external mounting hole 41 is smaller than the outer contour of the abutting structure 22, and the abutting structure 22 abuts against the lower edge of the external mounting hole 41. In one embodiment, as shown... Figure 5 and Figure 6 As shown, the elastic arm 23 abuts against the upper edge of the external mounting hole 41, thereby confining the mounting portion 2 within the external mounting hole 41. In another embodiment, as... Figure 16 and Figure 18 As shown, the elastic arm 23 abuts against the side wall of the external mounting hole 41, thereby limiting the mounting part 2 to the external mounting hole 41.

[0062] Traditional human body detection devices typically have spring-loaded claws on both sides of the detection body 1, which abut against the upper surface of the ceiling panel 4 to prevent the detection body 1 from falling. However, these spring-loaded claws cause inconvenience during installation. Figure 5 , Figure 6 as well as Figure 16 and Figure 18As shown, the human body detection device provided by this utility model has an elastic arm 23 constructed as an elastic sheet, which extends from the first sidewall 21. During installation, the user can pinch the elastic arm 23 with their fingers to bend and deform it, allowing the elastic arm 23 to be inserted into the external mounting hole 41. After the elastic arm 23 is inserted into the external mounting hole 41, the elastic arm 23 springs open and abuts against the upper edge or sidewall of the external mounting hole 41, while the abutting structure 22 abuts against the lower edge of the external mounting hole 41. The installation is then complete. The entire installation process is simple, convenient, and safer.

[0063] Furthermore, traditional human body detection devices place spring-loaded claws on both sides of the detection body 1. Because the springs occupy a large amount of side space, the mounting part 2 has difficulty fitting the small-diameter external mounting hole 41. The human body detection device provided by this invention has an elastic arm 23 constructed as a thin elastic sheet, occupying very little side space, allowing the mounting part 2 to fit the small-diameter external mounting hole 41. In one embodiment, the diameter of the external mounting hole 41 is 75mm.

[0064] In another exemplary installation process, such as Figure 6 As shown, when the ceiling panel 4 is thicker, the wall thickness of the external mounting hole 41 will also be thicker. Due to the limitation of the wall thickness of the external mounting hole 41, the elastic arm 23 will not fully spring open after being inserted into the external mounting hole 41. Instead, it will be pressed against the external mounting hole 41 and be in a bent state, which makes the contact force between the elastic arm 23 and the external mounting hole 41 greater, thereby making the connection between the mounting part 2 and the external mounting hole 41 more stable.

[0065] It is worth noting that the detection subject 1 can be used to detect a stationary human body, a moving human body, human movements, or subtle human movements.

[0066] In one embodiment, the detection body 1 is provided with a first circuit board 14, and a human body detection module 141 is provided on the first circuit board 14. The human body detection module 141 can be triggered in response to the presence of a stationary or moving human body in a detection area 3 to detect whether there is a person in the detection area 3. The human body detection module 141 can be an infrared pyroelectric sensor, a microwave radar module, etc. In a specific example, such as Figure 8As shown, the human body detection module 141 is configured as a microwave radar module. Specifically, the microwave radar module emits an induction beam into the detection area 3 and detects the echoes fed back by moving objects. Based on the echoes, it determines whether a person is present in the detection area 3. In another example (not shown in the figure), the human body detection module 141 is configured as an infrared pyroelectric sensor. A Fresnel lens is positioned facing the detection area 3. The Fresnel lens focuses infrared light onto the infrared pyroelectric sensor, allowing the sensor to determine the presence of a person based on changes in the infrared light. Specifically, when a person moves within the detection area 3, the light emitted by the person moves across the infrared pyroelectric sensor, causing a changing electrical signal. The detection body 1 then determines whether a person is present in the detection area 3 based on this electrical signal. In this embodiment of the invention, a microwave radar module is used as an example for detailed description. However, the scope of protection of this invention is not limited to this. In other embodiments, the human body detection module 141 can be other detection modules.

[0067] In some embodiments, such as Figure 1 and Figure 7 As shown, the elastic arm 23 protrudes beyond the outer edge of the abutment structure 22. When the mounting part 2 is installed in the external mounting hole 41, the elastic arm 23 can abut against the upper edge of the external mounting hole 41, greatly reducing the risk of the human body detection device falling. The fact that the elastic arm 23 protrudes beyond the outer edge of the abutment structure 22 can be understood as the projection of the elastic arm 23 onto the horizontal plane exceeding the range of the projection of the outer edge of the abutment structure 22 onto the horizontal plane.

[0068] In the prior art, the human body detection device is engaged with the external mounting hole 41 by a spring-loaded claw. Because the spring-loaded claw requires longitudinal operation, it needs to be pried from bottom to top during installation, resulting in a large stroke and a risk of it springing back and hitting the user's hand. Therefore, it is difficult to pry it to the required angle, causing inconvenience during installation and posing a significant safety hazard. Based on this, in some embodiments, such as... Figure 1 and Figure 7 As shown, the extension direction of the elastic arm 23 is tangent to the first sidewall 21, and the compression direction of the elastic arm 23 is lateral, making the rebound direction of the elastic arm 23 lateral. During installation, when the user's hand is below the mounting part 2, the rebound direction of the elastic arm 23 is different from the direction of the user's hand, thus reducing the risk of hitting the hand during rebound. The lateral direction can be understood as the direction closer to or further away from the side of the detection body 1. Furthermore, the tangency of the elastic arm 23 to the first sidewall 21 further reduces the lateral space occupied by the elastic arm 23, allowing the mounting part to accommodate a smaller diameter external mounting hole 41; simultaneously, it also makes the width of the abutment part narrower. Further, the elastic arm 23 is mounted flush against the first sidewall 21.

[0069] In some embodiments, such as Figures 1-8As shown, the first sidewall 21 is constructed as an annular wall, and the abutting structure 22 is constructed as an abutting ring extending outward from the bottom of the first sidewall 21. When the mounting part 2 is installed in the external mounting hole 41, the first sidewall 21 is embedded in the external mounting hole 41, and the outer diameter of the first sidewall 21 is slightly smaller than the inner diameter of the external mounting hole 41. The first sidewall 21 and the external mounting hole 41 cooperate to position the mounting part 2 and the external mounting hole 41 in the horizontal direction.

[0070] In some embodiments, such as Figures 4-6 As shown, the elastic arm 23 has a first edge 231 facing the abutting structure 22, which abuts against the upper edge of the external mounting hole 41; the abutting structure 22 has a first surface 221 facing the elastic arm 23, which abuts against the lower edge of the external mounting hole 41; wherein, the first surface 221 is set as the upper surface of the abutting structure 22. The first edge 231 can be a straight edge or a curved edge, or a combination of a straight edge and a curved edge. In a specific embodiment, such as... Figure 4 As shown, the first edge 231 is configured as the downward-facing oblique edge of the elastic arm 23, and the first edge 231 is shown in bold in the figure.

[0071] In some embodiments, such as Figure 4 and Figure 3 As shown, the extension direction of the first edge 231 is inclined at an angle α towards the first direction based on the plane where the first surface 221 is located. The elastic arm 23 includes a connecting end 232, which is connected to the mounting part 2 by a connecting screw 16. Due to manufacturing errors, the abutment structure 22 cannot precisely restrict the rotation of the elastic arm 23. When the elastic arm 23 rotates counterclockwise, the inclination degree of the first edge 231 will decrease, which may result in the first edge 231 failing to abut against the upper edge of the thick ceiling panel. Therefore, in this embodiment, the first direction is set to be the same as the tightening direction of the connecting screw 16. The first direction can be either a clockwise direction or a counterclockwise direction. Taking the clockwise direction as an example: the connecting screw 16 is tightened in a clockwise direction. When the connecting screw 16 is tightened, the connecting screw 16 drives the elastic arm 23 to rotate in the first direction through friction, so that the elastic arm 23 remains in an upward state, thereby ensuring that the angle α is large enough and avoiding the first edge 231 failing to abut against the upper edge of the external mounting hole 41 due to the angle being too small.

[0072] Furthermore, the angle α satisfies the condition: 14°≤α≤45°. When α is small, the first edge 231 is biased towards the horizontal direction, and the space between the first edge 231 and the first surface 221 is small. If the ceiling panel 4 is thick, the thickness of the ceiling panel 4 may exceed the height of the first edge 231, making it impossible for the first edge 231 to abut against the upper edge of the external mounting hole 41, and the mounting part 2 is at risk of falling off. When α is large, the first edge 231 is biased towards the vertical direction, and the vertical component of the contact force between the first edge 231 and the external mounting hole 41 is small, making it easy for the mounting part 2 to fall off from the external mounting hole 41. Through force analysis and multiple experimental studies, the applicant found that setting α to 14°≤α≤45° provides the best connection stability between the mounting part 2 and the external mounting hole 41. In a preferred embodiment, α = 20°.

[0073] The thickness of commonly available ceiling panels is approximately 8mm. Therefore, if... Figure 4 As shown, the distance between the end of the first edge 231 and the first surface 221 is set to L, and L is set to be greater than or equal to 8mm. This ensures that the height of the end of the first edge 231 is greater than the thickness of the ceiling panel 4, allowing the first edge 231 to abut against the upper edge of the external mounting hole 41, rather than against the side wall of the external mounting hole 41, thus reducing the risk of falling. In a preferred embodiment, L = 16mm to accommodate the thickness of most ceiling panels 4 on the market.

[0074] In some embodiments, such as Figure 1 and Figure 7 As shown, there are two elastic arms 23, which are respectively disposed on both sides of the mounting part 2. One elastic arm 23, after its first edge 231 extends 180° along the central axis of the mounting part 2, coincides with the first edge 231 of the other elastic arm 23, allowing the user to rotate and remove the mounting part 2 from the external mounting hole 41. Specifically, as... Figure 6 and Figure 7 As shown, when the mounting part 2 is installed in the external mounting hole 41, the first edges 231 of the two elastic arms 23 symmetrically abut against both sides of the external mounting hole 41, and the mounting part 2 is subjected to a balanced abutting force. At this time, the two elastic arms 23 are pressed and are in a bent state, and the extension direction after bending is clockwise. If the user rotates the mounting part 2 counterclockwise and pulls the mounting part 2 downward, the frictional force on the elastic arms 23 is in the same direction as the extension direction of the first edges 231. At this time, the frictional force is minimal, so that the user can remove the human body detection device.

[0075] In some embodiments, after the human body detection device is installed, the mounting part 2 can be rotated slightly at a certain angle toward the extension direction of the elastic arm 23, so that the contact force between the elastic arm 23 and the external mounting hole 41 is greater, which can enhance the connection stability between the mounting part 2 and the external mounting hole 41.

[0076] In some embodiments (not shown in the figures), the elastic arm 23 is fitted with a rubber sleeve to increase the friction of the first edge 231 and prevent the human body detection device from falling off. Simultaneously, during the process of rotating the mounting part 2 from the external mounting hole 41, since the direction of the friction force on the elastic arm 23 is biased towards the bending direction of the elastic arm 23, increasing the friction of the first edge 231 also prevents the elastic arm 23 from slipping and becoming difficult to retract, thus preventing the mounting part 2 from being difficult to remove. It is worth noting that since the elastic arm 23 is made of steel sheet, the rubber sleeve on its outer surface serves to prevent hand cuts. Furthermore, the first edge 231 is constructed with a wavy, toothed shape (not shown in the figures), thereby further increasing the friction of the first edge 231.

[0077] In some embodiments, such as Figure 3 , Figure 9 and Figure 10 As shown, the nut thickness of the connecting screw 16 is less than or equal to 2.5 mm to reduce the side space occupied by the nut, making the width of the mounting part 2 in the radial direction narrower and able to fit the smaller diameter external mounting hole 41. In a specific embodiment, the nut thickness of the connecting screw 16 is 1.7 mm. The mounting part 2 is sleeved on the detection body 1, and the connecting screw 16 passes through the connecting end 232 and the first side wall 21 to connect to the detection body 1. The mounting part 2 can rotate based on the horizontal axis of the extension direction of the connecting screw 16. Since the extension direction of the connecting screw 16 is horizontal, the detection body 1 can rotate in the vertical plane based on the mounting part 2. Since the mounting part 2 is confined to the external mounting hole 41 by abutment, the mounting part 2 can rotate within the external mounting hole 41 based on the first edge 231 of the elastic arm 23. With the rotational connection between the detection body 1 and the mounting part 2, the detection body 1 can adjust the detection direction within a conical space, improving the accuracy of the detection.

[0078] In one embodiment, when the mounting screw 16 is screwed into the threaded connection hole 114, it has at least a first position and a second position. The screwing stroke of the mounting screw 16 in the first position and the second position are different, and the rotational damping between the detection body 1 and the mounting part 2 is different in the first position and the second position. The first position can be understood as a position where the screw 16 is screwed in to a relatively shallow depth, and the second position can be understood as a position where the screw 16 is screwed in to a deeper depth. As the screw 16 is screwed in to a deeper depth, the rotational damping between the detection body 1 and the mounting part 2 gradually increases, thereby adjusting the rotational damping by adjusting the screwing depth of the screw 16.

[0079] Furthermore, such as Figure 3 and Figure 8 As shown, threaded connection holes 114 are respectively provided on both sides of the detection body 1. The first sidewall 21 is provided with a first connecting through hole 211 at the corresponding position of the threaded connection hole 114. The connecting end 232 of the elastic arm 23 fits against the first sidewall 21. The connecting end 232 is provided with a second connecting through hole 233 at the corresponding position of the threaded connection hole 114. The connecting screw 16 passes through the second connecting through hole 233 and the first connecting through hole 211 and is fixedly connected to the threaded connection hole 114. A first convex shaft 212 is provided on the first sidewall 21 facing the detection body 1 at the corresponding position of the first connecting through hole 211. The first connecting through hole 211 passes through the first convex shaft 212. A semi-circular bushing 115 is provided on the sidewall of the detection body 1 at the corresponding position of the first convex shaft 212. The semi-circular bushing 115 is sleeved on the upper side of the first convex shaft 212 to position the first convex shaft 212. Furthermore, the first sidewall 21 is provided with a fitting portion 214 at a position corresponding to the connecting end 232 of the elastic arm 23. The shape of the fitting portion 214 corresponds to the connecting end 232, and the side of the fitting portion 214 facing the elastic arm 23 is set as a plane so that the elastic arm 23 can be fitted and installed in the fitting portion 214, thereby making the extension direction of the elastic arm 23 tangent to the first sidewall 21. The first convex shaft 212 is disposed inside the fitting portion 124, and the first connecting through hole 211 is formed in the fitting portion 214.

[0080] like Figure 9 and Figure 10As shown, a limiting inclined surface 213 is provided on the inner side of the first sidewall 21. When the detection body 1 rotates to its limit position based on the mounting part 2, the limiting inclined surface 213 abuts against the side of the detection body 1, thereby limiting the limit position of the rotation of the detection body 1. The function of providing the limiting inclined surface 213 on the first sidewall 21 is to reduce the thickness of the first sidewall 21, allowing the detection body 1 to rotate to a larger limit angle. In a specific embodiment, the limiting inclined surface 213 is provided on the inner side of the first sidewall 21 and the inner side of the abutment structure 22. The detection body 1 reaches its limit position after rotating 30° clockwise or counterclockwise from a vertically downward direction.

[0081] Furthermore, such as Figure 3 , Figure 9 and Figure 10 As shown, the first sidewall 21 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. The first side, the second side, the third side, and the fourth side are evenly distributed around the perimeter of the first sidewall 21. The first side and the second side are respectively provided with the connecting screws 16, and the third side and the fourth side are respectively provided with the limiting inclined surfaces 213. The height of the third side and the fourth side of the first sidewall 21 is less than 3mm, which makes the limit angle of rotation of the detection body 1 larger.

[0082] In some embodiments, such as Figure 4 and Figure 3 As shown, the connecting end 232 is provided with a second edge 234 facing the abutting structure 22. The second edge 234 is parallel to the first surface 221. The abutting structure 22 is provided with a first recessed groove 222 at the corresponding position of the second edge 234. The second edge 234 is accommodated in the first recessed groove 222, so that the first edge 231 intersects with the first surface 221, thereby avoiding the bottom of the first edge 231 from not being able to abut against the external mounting hole 41 when the ceiling panel 4 is very thin.

[0083] Furthermore, since the elastic arm 23 is fixed to the first sidewall 21 by only one connecting screw 16, the elastic arm 23 can rotate based on the connecting screw 16 without other limiting action, causing the angle α between the first edge 231 and the first surface 221 to change, resulting in a change in the height of the end of the first edge 231. To prevent the elastic arm 23 from rotating based on the connecting screw 16, in this embodiment, the second edge 234 abuts against the first recessed groove 222, so that the elastic arm 23 is restricted from rotating by the first recessed groove 222.

[0084] In some embodiments, such as Figure 9 and Figure 8As shown, the mounting part 2 is sleeved on the detection body 1, and the distance between the first sidewall 21 and the detection body 1 is less than 6mm, so as to reduce the radial width of the mounting part 2 and enable the mounting part 2 to fit the external mounting hole 41 with a smaller diameter.

[0085] In some embodiments, such as Figure 2 and Figure 9 As shown, the detection body 1 has a second surface 13 facing the detection area 3, and the mounting part 2 has a third surface 24 facing the detection area 3. The distance between the second surface 13 and the third surface 24 is less than 5 mm. When the detection body 1 rotates based on the connecting screw 16, it is less likely to interfere with the mounting part 2, thereby allowing for a larger angle adjustment range of the detection body 1. In a preferred embodiment, the second surface 13 is flush with the third surface 24.

[0086] In some embodiments, such as Figure 9 and Figure 11 As shown, the detection body 1 includes a first circuit board 14 and a second circuit board 15. The first circuit board 14 is configured as a low-voltage board, and the second circuit board 15 is configured as a high-voltage board. A terminal block 151 is soldered onto the second circuit board 15 for connecting to 220V household AC power. A voltage converter is installed on the second circuit board 15 to convert the 220V AC power to low-voltage DC power. The second circuit board 15 is connected to the first circuit board 14 via pin headers 152 and female headers 146. The low-voltage DC power supplies power to the first circuit board 14. Further, as... Figure 9 , Figure 12 and Figure 13As shown, the first circuit board 14 is disposed inside the detection body 1; the human body detection module 141 is disposed on the side of the first circuit board 14 facing the detection area 3. The human body detection module 141 is specifically a microwave radar module, which can sense and identify moving, micro-moving, standing, sitting, and lying human bodies, so that the detection body 1 can sense whether there is a person in the detection area 3. The specific model of the microwave radar module is HLK-LD2410, which includes a radar circuit board, a radar chip, a transmitting antenna, and a receiving antenna. The radar chip, the transmitting antenna, and the receiving antenna are all disposed on the side of the radar circuit board facing the detection area 3. One end of the radar circuit board is soldered to the first circuit board 14 through pin headers, and the other end is bonded to the first circuit board 14 through foam 1411. The thickness of the foam 1411 is adapted to the height of the pin headers, so that the radar circuit board is horizontal, thereby making the detection direction vertical. The radar chip transmits the detection wave through the transmitting antenna, thereby forming a detection area 3 that can be covered by the detection wave. The receiving antenna receives the echo fed back by the moving object in the detection area 3. The radar chip generates sensing data based on the processing of the echo and transmits it to the first circuit board 14.

[0087] A wireless communication module 147 is provided on the first circuit board 14. The wireless communication module 147 generates a sensing result based on the preset processing of the sensing data and sends a wireless signal to the outside. The wireless signal can control the switching of the working state of the actuator, such as a light, curtain motor, or fresh air unit.

[0088] Furthermore, Figure 13 As shown, the wireless communication module 147 is arranged perpendicular to the human body detection module 141.

[0089] Furthermore, such as Figures 12-14As shown, the detection body 1 further includes: a first housing 11 and a pressing component 18, with the first circuit board 14 disposed inside the first housing 11; the pressing component 18 is movably connected to the first housing 11, and the movable connection can be a rotational connection, a sliding connection, a flexible connection, or other movable connection methods. A detection switch 142 is provided on the first circuit board 14 at a position corresponding to the pressing component 18. The pressing component 18 can respond to external pressing pressure by moving the first housing 11, thereby pressing and triggering the detection switch 142; the first circuit board 14 is also provided with a light intensity detection module 143 for detecting light intensity, and the light intensity detection module 143 is positioned opposite the pressing component 18; the portion of the pressing component 18 corresponding to the light intensity detection module 143 is light-transmitting. The detection switch 142 can be a micro switch, a tactile switch, a membrane switch, a Hall effect switch, or other types of detection switches 142. In a specific embodiment, the detection switch 142 is a tactile switch. Furthermore, the pressing component 18 has a trigger rib 182 protruding towards the detection switch 142, and the pressing component 18 presses against and triggers the detection switch 142 through the trigger rib 182. Furthermore, the pressing component 18 has a light guide post 181 positioned opposite the illuminance detection module 143, and ambient light outside the first housing 11 is transmitted to the illuminance detection module 143 through the light guide post 181; wherein, setting the light guide post 181 directly opposite the illuminance detection module 143 can improve the illuminance detection sensitivity. The first circuit board 14 has two light-emitting modules 144, which are respectively located on both sides of the illuminance detection module 143. The distance between the light-emitting modules 144 and the illuminance detection module 143 is less than a preset value, so that the light emitted by the light-emitting modules 144 is transmitted to the outside of the first housing 11 through the light guide post 181. In this embodiment, the preset value is 3mm. Furthermore, the light-emitting module 144 is specifically an LED light, and the illuminance detection module 143 is specifically a photoresistor. The pressing component 18 provided in this embodiment can not only be pressed to trigger the detection switch 142, but also transmit light, allowing the illuminance detection module 143 to detect ambient light. It can also display the light emitted by the light-emitting module 144, integrating the button 184, indicator light, and light sensor into a single structure, simplifying the structure. Moreover, it reduces the number of openings in the housing of existing products from three to one, improving the uniformity of the housing thickness, thereby improving the sensing accuracy of the human body detection module 141 and reducing the adverse effects of the housing openings on the sensing effect of the human body detection module 141. Additionally, in a dark environment, when the detection subject 1 detects the presence of someone, the light-emitting module 144 emits light, allowing the user to clearly determine the position of the pressing component 18 and accurately operate the pressing component 18 to trigger the detection switch 142.

[0090] like Figure 11 and Figure 12 As shown, the first housing 11 is specifically a cup-shaped structure with an open top. The threaded connection hole 114 is formed on the side wall of the first housing 11. A second housing 12 is provided on the top of the first housing 11, and the second housing 12 is fixedly connected to the first housing 11 by screws. The first housing 11 is provided with circuit board support ribs, which abut against the lower surface of the second circuit board 15 to support the second circuit board 15. The second housing 12 is provided with ribs that abut against the upper surface of the second circuit board 15, thereby clamping and fixing the second circuit board 15. The second housing 12 has a wiring hole 121 at the corresponding position of the wiring terminal 151, which exposes the wiring terminal 151 for wiring. A limiting wall is provided at the corresponding position of the side wall of the wiring hole 121, which abuts against the side wall of the wiring terminal 151, thereby positioning the wiring terminal 151 and the wiring hole 121. Figure 12 and Figure 13 As shown, the first circuit board 14 has three circuit board connection holes 148 and three positioning holes 149. The first housing 11 is provided with a threaded connection post 116 and a positioning post 117. The positioning post 117 is inserted into the positioning hole 149 to position the first circuit board 14. The circuit board connection holes 148 are fixedly connected to the threaded connection post 116 by screws.

[0091] Furthermore, such as Figure 14 and Figure 7 As shown, the pressing component 18 is rotatably connected to the first housing 11 via a rotating shaft 183. In the second direction, the detection switch 142, the rotating shaft 183, and the light guide post 181 are sequentially distributed. The second direction is set to be parallel to the first circuit board 14 and perpendicular to the rotating shaft 183. The rotatable connection can be understood as a connection method that can generate rotational movement. It can be achieved through the cooperation of a shaft and a hole, through a limiting method, through a flexible connection, or through other methods. The rotating shaft 183 can be a solid shaft or an axis. In this embodiment, the rotating shaft 183 is specifically a second protruding shaft protruding outward from both sides of the pressing component 18. The second direction has already been... Figure 14 As indicated in the winning bid, in this embodiment, the detection switch 142, the rotating shaft 183, and the light guide column 181 are distributed sequentially. When the pressing component 18 moves, the trigger rib 182 presses against the detection switch 142, and the light guide column 181 moves in a direction away from the illuminance detection module 143 to prevent the light guide column 181 from damaging the illuminance detection module 143.

[0092] Furthermore, such as Figure 14 and Figure 15As shown, the pressing assembly 18 includes a button 184 and a button cover 185. The button 184 is rotatably connected to the first housing 11 and is disposed on the inner side of the first housing 11. The light guide post 181, the rotating shaft 183, and the trigger rib 182 are all disposed on the button 184. Specifically, the rotating shaft 183 is provided on both sides of the button 184. The first housing 11 is provided with a rotating shaft hole 111 that cooperates with the rotating shaft 183. The rotating shaft 183 is inserted into the rotating shaft hole 111 to realize the rotatable connection between the button 184 and the first housing 11. The button 184 extends horizontally outward from both sides of the trigger rib 182, with S-shaped arms 186 extending outward. The ends of the S-shaped arms 186 have snap-fit ​​holes 1861. The first housing 11 is correspondingly provided with a snap-fit ​​shaft 112. The snap-fit ​​holes 1861 are fitted into the snap-fit ​​shaft 112, and the snap-fit ​​shaft 112 and snap-fit ​​holes 1861 are heat-fused and fixed, allowing the button 184 to be elastically connected to the first housing 11. The S-shaped arms 186 provide a restoring force for the button 184. When the pressing force is removed, the button 184 returns to its original position under the elastic force of the S-shaped arms 186. The button cover 185 covers the outer surface of the button 184 and is located on the outside of the first housing 11. The first housing 11 has a button receiving groove 113 (e.g., [insert groove here]) at the corresponding position of the button cover 185, which is adapted to the shape of the button cover 185. Figure 15 As shown, the bottom of the button receiving groove 113 is inclined to the button cover 185. Specifically, the depth of one end of the button receiving groove 113 facing the trigger rib 182 is greater than the depth of the other end, which is used to provide pressing space for the button cover 185, so that the button cover 185 can drive the button 184 to trigger the detection switch 142. At the same time, the button receiving groove 113 supports one end of the button cover 185 facing the light guide column 181, preventing the button 184 from pressing the light guide column 181 and causing damage to the illuminance detection module 143.

[0093] Furthermore, the button cover 185 is integrally formed from a light-transmitting material, and a light-shielding sheet (not shown in the figure) is covered on the inner side of the button cover 185. The light-shielding sheet has a light-transmitting hole at the position corresponding to the light guide post 181, so that the light guided by the light guide post 181 can be transmitted to the outside.

[0094] In another embodiment, such as Figures 16-19 As shown, this embodiment is similar to Figures 1-15The difference between the embodiments lies in the structure of the elastic arm 23 and the fitting part 214; all other structures are the same. The elastic arm 23 provided in this embodiment includes a main arm 235 and branch arms 236 extending from both sides of the main arm 235. The main arm 235 has a third connecting through hole 239, the position of which is opposite to the position of the threaded connecting hole 114. The main arm 235 is fixedly connected to the first sidewall 21 by connecting screws 15, and the main arm 235 extends from the first sidewall 21. The first sidewall 21 has a first connecting through hole 211 at a position corresponding to the threaded connecting hole 114. The connecting screw 16 passes through the third connecting through hole 239 and the first connecting through hole 211 and is fixedly connected to the threaded connecting hole 114. The branch arms 236 extend downward from both sides of the main arm 235, and the free ends of the branch arms 236 are bent outward to form first abutting arms 2361, as shown below. Figure 18 As shown, when the mounting part 2 is installed in the external mounting hole 41, the first abutting arm 2361 abuts against the side wall of the external mounting hole 41. The main arm 235, the branch arm 236, and the first abutting arm 2361 undergo elastic deformation. Under the abutting action of the first abutting arm 2361, the external mounting hole 41 limits the mounting part 2, so that the mounting part 2 is embedded in the external mounting hole 41. Further, the branch arm 236 is slightly bent towards the detection body 1 relative to the main arm 235, so that the abutting part of the first abutting arm 2361 fits more closely to the curvature of the external mounting hole 41.

[0095] Furthermore, such as Figures 16-19 As shown, the main arm 235 is attached to the fitting part 214. Since the first abutting arm 2361 and the branch arm 236 will undergo elastic deformation toward the detection body 1 when the first abutting arm 2361 is abutted, the width of the fitting part 214 in this embodiment is narrower than the distance between the two branch arms 236, so as to avoid interference between the branch arm 236 and the first abutting arm 2361 and the fitting part 214 when they undergo elastic deformation.

[0096] like Figure 16 and Figure 19 As shown, in some embodiments, the end of the first abutment arm 2361 is bent downward to form a second abutment arm 2362, such as... Figure 18As shown, when the mounting part 2 is installed in the external mounting hole 41, the connection between the second abutting arm 2362 and the first abutting arm 2361 forms an outwardly protruding corner. This corner abuts against the side wall of the external mounting hole 41, resulting in greater abutting pressure and a more stable connection between the elastic arm 23 and the external mounting hole 41. In addition, the end of the second abutting arm 2362 abuts against the first side wall 21, and the second abutting arm 2362 provides support force to the first abutting arm 2361, so that the abutting force between the first abutting arm 2361 and the external mounting hole 41 is greater, and the connection between the elastic arm 23 and the external mounting hole 41 is more stable, thereby preventing the human body detection device from falling off.

[0097] like Figures 16-19 As shown, in some embodiments, the upper end of the main arm 235 is bent outward to form an anti-detachment arm 237; as Figure 18 As shown, when the mounting part 2 is detached from the external mounting hole 41, the user first prys the mounting part 2 downward out of the external mounting hole 41. At this time, the first abutment arm 2361 disengages from the external mounting hole 41, and the human body detection device is at risk of falling. Therefore, this embodiment is provided with an anti-detachment arm 237. The anti-detachment arm 237 bends outward. After the first abutment arm 2361 disengages from the external mounting hole 41, the anti-detachment arm 237 can be hooked onto the upper edge of the external mounting hole 41, thereby preventing the human body detection device from falling. Furthermore, the anti-detachment arm 237 has a through hole for connecting a hanging rope.

[0098] like Figure 16 and Figure 19 As shown, in some embodiments, since the elastic arm 23 is fixedly connected to the first sidewall 21 by the connecting screw 16, the elastic arm 23 can rotate based on the connecting screw 16. However, in order to keep the main arm 235 in a vertical state, it is necessary to prevent the elastic arm 23 from rotating. In this embodiment, the lower end of the main arm 235 abuts against the abutment structure 22 to restrict the rotation of the elastic arm 23 based on the connecting screw 16, so that the main arm 235 remains in a vertical state. In one embodiment, two support arms 238 are provided at the lower end of the main arm 235. The two support arms 238 are of equal height and abut against the first surface 221 of the abutment structure 22 to restrict the rotation of the elastic arm 23 based on the connecting screw 16.

[0099] like Figures 16-18As shown, in this embodiment, there are two elastic arms 23, symmetrically arranged on both sides of the mounting part 2. When the user installs the mounting part 2, they only need to pinch the anti-detachment arm 237 within the diameter range of the external mounting hole 41 to insert the elastic arm 23 into the external mounting hole 41. Then, by pushing the mounting part 2 upward, the elastic arm 23 undergoes elastic deformation under the pressure of the external mounting hole 41, and the first abutting arm 2361 generates an abutting force with the external mounting hole 41. Under the action of the abutting force, the mounting part 2 is confined within the external mounting hole 41. When the user pushes the mounting part 2 upward until the abutting structure 22 abuts against the lower surface of the ceiling panel, the installation is complete. The entire installation process is simple, convenient, and safer.

[0100] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A human body detection device, wherein, include: Detection subject; The mounting part is connected to the detection body; The mounting portion includes a first sidewall, an abutment structure, and at least two elastic arms. The abutment structure protrudes from the first sidewall. The elastic arms extend from the first sidewall and are constructed as elastic sheets.

2. The human body detection device according to claim 1, wherein, The first sidewall is constructed as an annular wall, and the abutting structure is constructed as an abutting ring extending outward from the bottom of the first sidewall.

3. The human body detection device according to claim 1, wherein, The mounting part is sleeved on the detection body, and the distance between the first sidewall and the detection body is less than 6mm.

4. The human body detection device according to claim 1, wherein, The detection body is equipped with a first circuit board, on which a human body detection module is installed. The human body detection module can be triggered in response to the presence of a stationary or moving human body in a detection area. The detection body has a second surface facing the detection area, and the mounting part has a third surface facing the detection area. The distance between the second surface and the third surface is less than 5 mm.

5. A human body detection device according to any one of claims 1-4, wherein, The elastic arm protrudes beyond the outer edge of the abutment structure; the extension direction of the elastic arm is tangent to the first sidewall, and the compression direction of the elastic arm is lateral.

6. A human body detection device according to any one of claims 1-4, wherein, The human body detection device is mounted on the external mounting hole via the mounting part, and the elastic arm has a first edge facing the abutting structure, the first edge being used to abut the upper edge of the external mounting hole; The abutting structure has a first surface facing the elastic arm, the first surface being used to abut the lower edge of the external mounting hole; The extension direction of the first edge is inclined at an angle α based on the plane where the first surface is located toward the first direction. The elastic arm includes a connecting end, which is connected to the mounting part by a connecting screw. The tightening direction of the connecting screw is in the same direction as the first direction. The angle α satisfies the condition: 14°≤α≤45°. The distance between the end of the first edge and the first surface is set to L, and L is set to be greater than or equal to 8 mm.

7. A human body detection device according to claim 6, wherein, The thickness of the nut of the connecting screw is less than or equal to 2.5 mm; The mounting part is sleeved on the detection body, and the connecting screw passes through the connecting end and the first sidewall and is connected to the detection body. The mounting part can rotate based on the connecting screw, the extension direction of the connecting screw is horizontal, and the mounting part can rotate within the external mounting hole based on the first edge of the elastic arm, so that the detection body can adjust the detection direction within a conical space.

8. A human body detection device according to claim 7, wherein, The connecting end is provided with a second edge facing the abutting structure. The second edge is parallel to the first surface. The abutting structure is provided with a first recessed groove at the position corresponding to the second edge. The second edge is accommodated in the first recessed groove, so that the first edge intersects with the first surface. The second edge abuts against the first recessed groove, thereby restricting the rotation of the elastic arm by the first recessed groove.

9. A human body detection device according to claim 6, wherein, The number of elastic arms is two, and the two elastic arms are respectively disposed on both sides of the mounting part. The extension direction of the first edge of one elastic arm is rotated 180° along the central axis of the mounting part and coincides with the extension direction of the first edge of the other elastic arm. The elastic arm is fitted with a rubber sleeve.

10. A human body detection device according to any one of claims 1-4, wherein, The elastic arm includes a main arm and branch arms extending on both sides of the main arm. The main arm is fixedly connected to the first side wall by connecting screws and extends outward based on the first side wall. The free ends of the branch arms are bent outward to form first abutting arms. When the mounting part is installed in the external mounting hole, the first abutting arm abuts against the side wall of the external mounting hole, and the external mounting hole limits the mounting part under the abutting action of the first abutting arm. The end of the first abutment arm is bent downward to form a second abutment arm. When the mounting part is installed in the external mounting hole, the end of the second abutment arm abuts against the first side wall, so that the abutment force between the first abutment arm and the external mounting hole is greater. The upper end of the main arm is bent outward to form an anti-detachment arm; The lower end of the main arm abuts against the abutment structure to restrict the rotation of the elastic arm based on the connecting screw.

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