Smart home security device based on Internet of Things

Abstract

The utility model discloses a smart home security device based on Internet of Things, which belongs to the technical field of security devices and comprises a power supply device, a security monitoring device is arranged at the bottom of the power supply device, a circuit substrate is fixedly mounted in the power supply device, and a driving device is fixedly arranged on the upper end face of the circuit substrate. A driving motor and a reciprocating circulation stop control module are arranged in the driving device, and an output shaft of the driving motor downwards protrudes out of the lower end face of the power supply device and is fixedly arranged with the security monitoring device. When the device is used, the reciprocating circulation stop control module controls the driving motor to move, so that the driving motor drives the security monitoring device to rotate through the driving motor output shaft, the security monitoring device continuously detects the indoor environment, the specific movement mode is controlled by the reciprocating circulation stop control module, and reciprocating rotation can be achieved; and continuous rotation can be achieved, and the purpose of 360-degree flexible angle adjustment is achieved.

Description

Technical Field

[0001] This utility model relates to a security device, and more particularly to a smart home security device based on the Internet of Things. Background Technology

[0002] Currently, security systems mainly include video surveillance systems, burglar alarm systems, building intercom systems, parking management systems, community access control systems, infrared perimeter alarm systems, electronic fences, patrol systems, attendance and access control systems, security computer room systems, electronic examination room systems, smart door locks, and so on.

[0003] A video surveillance system is an electronic system or network that uses video technology to detect and monitor protected areas and display and record images in real time. The front-end equipment of a video surveillance system consists of various types of cameras (or video alarms), monitors, and their accessories; transmission methods can include coaxial cable or fiber optic transmission. The system's terminal equipment includes display, recording, control, and communication devices (including multimedia technology equipment), typically using a separate video control center or a monitoring-alarm control center.

[0004] Existing indoor security monitoring devices are generally fixed in place. Although the security devices themselves have angle conversion capabilities, the monitoring range is limited and cannot achieve 360-degree all-round observation, resulting in poor security monitoring and a small coverage area.

[0005] A search revealed patent number CN214070051U, which provides an IoT-based smart home security device. The device includes a main body, a clamping structure, and an alarm structure. A connecting rod is located below the main body, and a wall is located on one side of the main body. A connecting frame is located outside the wall. The clamping structure includes an upper clamping arm located at one end of the connecting rod. One end of the upper clamping arm is rotatably connected to a lower clamping arm via a rotating rod. A locking block is located at the other end of the upper clamping arm. This invention, by setting up a clamping structure, a connecting frame, and a main body, allows for quick installation and removal of the main body by applying pressure to a pressing rod. The pressing rod moves under external pressure, causing a fixed ring to move. This movement of the fixed ring applies spring pressure, and simultaneously, one end of the pressing rod contacts one end of the locking block, applying pressure to that end. This allows the upper and lower clamping arms to be opened, thus removing the main body.

[0006] The combination of the security monitoring device and the linkage in the above scheme allows the security monitoring device to have the flexibility to set the angle, but the limited rotation angle makes it impossible to achieve 360-degree all-round observation, resulting in poor security monitoring and a small coverage area. Utility Model Content

[0007] The purpose of this invention is to provide an IoT-based smart home security device that has the advantage of flexible rotation angle, solving the problem that existing security monitoring devices have limited rotation angles and cannot achieve 360-degree all-round observation.

[0008] The present invention adopts the following technical solution: a smart home security device based on the Internet of Things, including a power supply device, a security monitoring device at the bottom of the power supply device, a circuit board fixedly installed inside the power supply device, a drive device fixedly installed on the upper surface of the circuit board, a drive motor and a reciprocating cycle stop control module inside the drive device, and the output shaft of the drive motor protruding downward from the lower surface of the power supply device and fixedly installed with the security monitoring device.

[0009] Furthermore, the outer surface of the security monitoring device is provided with a networking mechanism, and the top of the circuit board is provided with a control module mechanism that can start and stop the drive motor of the drive device and the security monitoring device. The control module mechanism has several plug-in holes on the side surface near the drive device, and the drive device has wiring holes corresponding to the plug-in holes. Connecting wires are inserted into the wiring holes of the drive device, and the other end of the connecting wires is inserted into the plug-in holes to realize the electrical connection between the control module mechanism and the drive device. The top of the circuit board is provided with a network IoT module, which can be connected to the network signal of the networking mechanism, and the two can work together to connect to external smart furniture devices. The top of the circuit board is provided with several self-test control modules, which perform self-test checks on external smart furniture devices in cooperation with the network IoT modules.

[0010] Furthermore, a fixed shaft is fixedly installed on the upper surface of the security monitoring device, and the fixed shaft and the output shaft of the drive motor are connected by a quick-release mechanism.

[0011] Furthermore, the quick-release mechanism includes an upright first truncated cone fixedly connected to the top of the fixed shaft, and an inverted second truncated cone sleeved on the fixed shaft. The second truncated cone is located below the first truncated cone. A baffle plate is fixedly installed on the fixed shaft located below the second truncated cone. An insertion hole is provided on the fixed shaft located between the first truncated cone and the second truncated cone.

[0012] Furthermore, the quick-release mechanism also includes a vertical hole on the lower end face of the drive motor output shaft that is adapted to the first and second truncated cones, and a pin that is radially slidably disposed on the drive motor output shaft. The lower end face of the pin has an inclined surface, and a spring is provided on the pin. The spring drives the pin to move inward continuously.

[0013] Furthermore, the vertical hole of the drive motor output shaft is provided with two symmetrical planes, and the first and second truncated cones are each provided with two symmetrical vertical surfaces that are adapted to the planes of the vertical hole.

[0014] Furthermore, a housing is fixedly provided on the outer surface of the drive motor output shaft at the position corresponding to the pin. The pin is slidably disposed in the housing along the radial direction of the drive motor output shaft. A guide rod is fixedly provided on the outer side of the pin. The guide rod protrudes from the outer end face of the housing and is fixedly provided with an end plate.

[0015] Furthermore, the spring is sleeved on the guide rod between the end plate and the housing, with the inner end of the spring fixed to the housing and the outer end of the spring fixed to the end plate, and the spring driving the guide rod to move inward at all times.

[0016] Furthermore, an indicator sleeve is fixedly provided on the inner side of the end plate around the guide rod; when the pin is inserted into the insertion hole of the fixed shaft, the guide rod drives the indicator sleeve to move inward through the end plate, so that the inner side of the indicator sleeve contacts the outer end face of the housing.

[0017] Furthermore, the spring is located inside the indicator sleeve, and the indicator sleeve has several observation ports.

[0018] I. This utility model, by setting up a drive motor, a reciprocating cycle stop control module, and a security detection device, allows the reciprocating cycle stop control module to control the movement of the drive motor during use. This causes the drive motor to drive the security detection device to rotate via its output shaft, enabling the security detection device to continuously monitor the indoor environment. The specific movement mode is controlled by the reciprocating cycle stop control module, allowing for both reciprocating and continuous rotation, achieving a 360-degree flexible angle adjustment.

[0019] II. This utility model, by setting up a fixed base, a first truncated cone, a second truncated cone, a drive motor output shaft, a pin, and a spring, allows for the disassembly of the security monitoring device. Pushing the security monitoring device upwards causes the fixed shaft, the second truncated cone, and the first truncated cone to move upwards. When the upper surface of the second truncated cone contacts the inclined surface of the pin, it forces the pin to move outwards and compresses the spring. As the second truncated cone moves upwards, when the inner end of the pin contacts the circumferential surface of the second truncated cone, it moves the security monitoring device downwards, thereby causing the fixed shaft to move downwards. This pushes and forces the second truncated cone to slide upwards relative to the fixed shaft. When the second truncated cone contacts the first truncated cone, the inner end of the pin brushes past the second truncated cone and the first truncated cone. When the contact line of the first truncated cone contacts the circumferential surface of the first truncated cone, and the security monitoring device is moved downwards, the fixed shaft of the security monitoring device, the first truncated cone, and the second truncated cone can be pulled out from the vertical hole of the output shaft of the drive motor, thus disassembling the security monitoring device. During installation, the security monitoring device is held and the first truncated cone is inserted into the vertical hole of the output shaft of the drive motor and pushed upwards. The circumferential surface of the first truncated cone contacts the inner end of the pin, forcing the pin to move outwards and compressing the spring. When the inner end of the pin sweeps past the bottom surface of the first truncated cone, the pin moves inwards under the pushing force of the spring, so that the inner end of the pin is inserted into the insertion hole of the fixed shaft, thus completing the installation. This achieves the purpose of facilitating the disassembly and installation of the security monitoring device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the circuit board in this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the security monitoring device in this utility model;

[0023] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the drive motor output shaft in this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the drive motor output shaft in this utility model;

[0025] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the shell in this utility model;

[0026] Figure 7 This is a three-dimensional structural diagram of the drive motor output shaft in this utility model;

[0027] Figure 8 This is a three-dimensional structural diagram of the first and second frustums in this utility model;

[0028] Figure 9This is a schematic diagram of the inching and continuous control circuit for the drive motor of this utility model;

[0029] Figure 10 This is a circuit diagram of the reciprocating cycle stop control module of this utility model.

[0030] In the diagram, 1. Power supply unit; 2. Security monitoring device; 3. Drive motor output shaft; 4. Wall; 5. Networking mechanism; 6. Circuit board; 7. Drive unit; 8. Control module mechanism; 9. Socket; 10. Self-test control module; 11. Network IoT module; 12. Fixed shaft; 13. First frustum; 14. Second frustum; 15. Blocking plate; 16. Socket; 17. Vertical hole; 18. Pin; 19. Inclined surface; 20. Spring; 21. Plane; 22. Vertical surface; 23. Housing; 24. Guide rod; 25. End plate; 26. Indicator sleeve; 27. Observation port. Detailed Implementation

[0031] Please see Figure 1-10 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0032] The smart home security device based on the Internet of Things described in this utility model includes a power supply device 1, a security monitoring device 2 for monitoring indoor home security is provided at the bottom of the power supply device 1, a circuit board 6 is fixedly installed inside the power supply device 1, a drive device 7 is fixedly provided on the upper surface of the circuit board 6, a drive motor and a reciprocating cycle stop control module are provided inside the drive device 7, and the output shaft 3 of the drive motor protrudes downward from the lower surface of the power supply device 1 and is fixedly provided with the security monitoring device 2.

[0033] In use, the power supply unit 1 is fixedly installed on the wall 4. The reciprocating cycle stop control module controls the movement of the drive motor, so that the drive motor drives the security monitoring device 2 to rotate through the drive motor output shaft 3, so that the security monitoring device 2 can continuously detect the room in 360 degrees. The specific movement mode is controlled by the reciprocating cycle stop control module, which can rotate back and forth or rotate continuously.

[0034] In this embodiment, a networking mechanism 5 is provided on the outer surface of the security monitoring device 2, and a control module mechanism 8 is provided on the top of the circuit board 6, which can control the start and stop of the drive motor of the drive device 7 and the security monitoring device 2. Several plug holes 9 are provided on the side surface of the control module mechanism 8 near the drive device 7. The plug holes 9 are circular plug holes 16. The drive device 7 is provided with wiring holes corresponding to the plug holes 9. Connecting wires are inserted into the wiring holes of the drive device 7, and the other end of the connecting wires is inserted into the plug holes 9 to realize the electrical connection between the control module mechanism 8 and the drive device 7. A network IoT module 11 is provided on the top of the circuit board 6. The network IoT module 11 can wirelessly communicate with the networking mechanism 5, and the two can work together to connect with external smart furniture devices. Several self-test control modules 10 are provided on the top of the circuit board 6. The self-test control modules 10 perform self-test checks on external smart furniture devices in cooperation with the network IoT modules 11. In this invention, the networking mechanism 5, the security monitoring device 2, the circuit board 6, the control module mechanism 8, the self-test control module 10, and the network IoT module 11 are all conventional technologies in the field and will not be described in detail here. The security monitoring device 2 can be a camera.

[0035] In this embodiment, a fixed shaft 12 is fixedly installed on the upper end face of the security monitoring device 2. The fixed shaft 12 and the drive motor output shaft 3 are connected by a quick-release mechanism. During daily use, the security monitoring device 2 can be quickly disassembled from the drive motor output shaft 3 through the quick-release mechanism, which facilitates the maintenance of the security monitoring device 2. During installation, the fixed shaft 12 of the security monitoring device 2 is connected to the drive motor output shaft 3 through the quick-release mechanism. The quick-release mechanism facilitates the disassembly and installation of the security monitoring device 2 and facilitates subsequent daily maintenance.

[0036] In this embodiment, the quick-release mechanism includes an upright first frustum 13 fixedly connected to the top end of the fixed shaft 12, and an inverted second frustum 14 sleeved on the fixed shaft 12. The second frustum 14 is located below the first frustum 13. A baffle plate 15 is fixedly installed on the fixed shaft 12 below the second frustum 14. An insertion hole 16 is provided on the fixed shaft 12 between the first frustum 13 and the second frustum 14. The second frustum 14 can slide freely up and down on the fixed shaft 12. Under the action of gravity, the second frustum 14 slides downward until it contacts the baffle plate 15 and stops sliding downward. The quick-release mechanism also includes a vertical hole 17 on the lower end face of the drive motor output shaft 3 that is adapted to the first frustum 13 and the second frustum 14. A pin 18 is radially slidable on the output shaft 3 of the drive motor. The lower end face of the pin 18 has a bevel 19. A spring 20 is installed on the pin 18, driving the pin 18 to move inwards continuously, so that the pin 18 is inserted into the insertion hole 16 of the fixed shaft 12, thus connecting the fixed shaft 12 to the output shaft 3 of the drive motor. When the security monitoring device 2 needs to be disassembled, it is pushed upwards, causing the fixed shaft 12 and the blocking plate 15 to move upwards, which in turn causes the second frustum 14 and the first frustum 13 to move upwards. When the upper end face of the second frustum 14 contacts the bevel 19 of the pin 18, the pin 18 is forced to move outwards, simultaneously compressing the spring 20. As the second frustum 14 moves upwards, when... When the inner end of the pin 18 contacts the circumferential surface of the second frustum 14, the security monitoring device 2 moves downward, thereby driving the fixed shaft 12 to move downward. At this time, due to the pushing force of the spring 20, the inner end of the pin 18 abuts against the circumferential surface of the second frustum 14, forcing the second frustum 14 to slide upward relative to the fixed shaft 12. When the second frustum 14 contacts the first frustum 13, the inner end of the pin 18 sweeps across the contact line between the second frustum 14 and the first frustum 13 and contacts the circumferential surface of the first frustum 13. Continuing to move the security monitoring device 2 downward, the fixed shaft 12, the first frustum 13, and the second frustum 14 of the security monitoring device 2 can be pulled out from the vertical hole 17 of the drive motor output shaft 3, realizing the disassembly of the security monitoring device 2; Installation When the security monitoring device 2 is held, the first truncated cone 13 is inserted into the vertical hole 17 of the drive motor output shaft 3 and pushed upward. The circumferential surface of the first truncated cone 13 contacts the inner end of the pin 18, forcing the pin 18 to move outward and compressing the spring 20. When the inner end of the pin 18 sweeps past the bottom surface of the first truncated cone 13, the pin 18 moves inward under the pushing force of the spring 20, so that the inner end of the pin 18 is inserted into the insertion hole 16 of the fixed shaft 12, thus completing the installation. When in use, the drive motor rotates through the drive motor output shaft 3, which drives the pin 18 to rotate. The second pin 18 drives the fixed shaft 12 to rotate, which in turn drives the security monitoring device 2 to rotate, so that the security monitoring device 2 can perform 360-degree detection of the room.

[0037] In the above scheme, during installation, the circumferential position of the security monitoring device 2 needs to be rotated so that the insertion hole 16 of the fixed shaft 12 corresponds to the pin 18 so that the pin 18 can be inserted into the insertion hole 16. The installation is relatively troublesome. In order to solve this problem, in this embodiment, two symmetrical planes 21 are provided in the vertical hole 17 of the drive motor output shaft 3. The first frustum 13 and the second frustum 14 are each provided with two symmetrical vertical surfaces 22 that are adapted to the planes 21 of the vertical hole 17. During installation, when the first frustum 13 is inserted into the vertical hole 17 of the drive motor output shaft 3, the two vertical surfaces 22 of the first frustum 13 correspond to the planes 21 of the vertical hole 17, which limits the position of the fixed shaft 12 in the circumferential direction and achieves positioning. At this time, the insertion hole 16 of the fixed shaft 12 corresponds to the pin 18.

[0038] In this embodiment, a housing 23 is fixedly provided on the outer surface of the drive motor output shaft 3 at the position corresponding to the pin 18. The pin 18 is slidably disposed in the housing 23 along the radial direction of the drive motor output shaft 3. A guide rod 24 is fixedly provided on the outer side of the pin 18. The guide rod 24 protrudes from the outer end face of the housing 23 and is fixedly provided with an end plate 25. A spring 20 is sleeved on the guide rod 24 between the end plate 25 and the housing 23. The inner end of the spring 20 is fixedly disposed with the housing 23, and the outer end of the spring 20 is fixedly disposed with the end plate 25. The spring 20 drives the guide rod 24 to move inward at all times.

[0039] To indicate whether the pin 18 is inserted into the socket 16 during installation, in this embodiment, an indicator sleeve 26 is fixedly provided on the inner side of the end plate 25 around the guide rod 24. When the pin 18 moves outward, it drives the guide rod 24 to move outward, and the guide rod 24 drives the indicator sleeve 26 to move outward through the end plate 25. When the pin 18 is inserted into the socket 16 of the fixed shaft 12, the guide rod 24 drives the indicator sleeve 26 to move inward through the end plate 25, so that the inner side of the indicator sleeve 26 is in contact with the outer end face of the housing 23. Therefore, during installation, when the inner side of the indicator sleeve 26 is in contact with the outer end face of the housing 23, it means that the pin 18 is fully inserted into the socket 16 of the fixed shaft 12, indicating that the installation is in place. The spring 20 is located inside the indicator sleeve 26, and the indicator sleeve 26 is provided with several observation ports 27. The observation ports 27 can be used to observe the state of the spring 20 and determine whether the spring 20 is damaged.

[0040] In this utility model, such as Figure 9 As shown, the control circuit for the drive motor performs the following functions:

[0041] Interlocking control: Pressing button SB2 energizes the coil of relay KM; at this time, the main contacts of relay KM connect the circuit, that is, contacts L1 and T1, L2 and T2, and L3 and T3 are connected, and motor M works; at the same time, the auxiliary contacts L4 and T3 of relay KM are connected, forming a self-locking mechanism; when button SB2 is released, motor M still works, thus achieving interlocking control.

[0042] When inching control is required, press button SB3. At this time, contacts 3 and 4 of button SB3 are connected, while contacts 1 and 2 are disconnected. Because contacts 3 and 4 are connected, the coil of relay KM is energized. At this time, the main contacts of relay KM connect the circuit, that is, contacts L1 and T1, L2 and T2, and L3 and T3 are connected, and motor M works. At the same time, the auxiliary contacts L4 and T3 of relay KM are connected. When button SB3 is released, contacts 3 and 4 of SB3 disconnect, and contacts 1 and 2 are also in the open state. At this time, the coil of relay KM is de-energized, and contacts L1 and T1, L2 and T2, and L3 and T3 are all in the open state. Motor M is de-energized and stops working. Thus, pressing button SB3 will make motor M work, and releasing button SB3 will make motor M stop running.

[0043] In this utility model, such as Figure 10 As shown, the circuit of the reciprocating cycle stop control module implements the following functions:

[0044] Forward start: Close the air switch QF1 to connect the three-phase power supply, press the forward start button SB4, the coil of relay KM4 is energized, the contacts of relay KM4 are attracted and self-locked through the auxiliary contacts, the main contacts close to connect the motor M, at this time the phase sequence of motor M is L1, L2, L3, that is, forward operation;

[0045] Reverse start: Close the air switch QF1 to connect the three-phase power supply, press the reverse start button SB5, the coil of relay KM5 is energized, the contacts of relay KM5 are attracted and self-locked through the auxiliary contacts, the main contacts close and change the three-phase power supply phase sequence of motor M. At this time, the phase sequence of motor M is L3, L2, L1, that is, reverse operation.

[0046] The working principle of this utility model is as follows: When the security monitoring device 2 needs to be disassembled, push the security monitoring device 2 upward, causing the fixed shaft 12 and the blocking plate 15 to move upward, which in turn causes the second truncated cone 14 and the first truncated cone 13 to move upward. When the upper end surface of the second truncated cone 14 contacts the inclined surface 19 of the pin 18, the pin 18 is forced to move outward and compress the spring 20. As the second truncated cone 14 moves upward, when the inner end of the pin 18 contacts the circumferential surface of the second truncated cone 14, the security monitoring device 2 moves downward, which in turn causes the fixed shaft 12 to move downward. At this time, because the inner end of the pin 18 is pushed by the spring 20, it abuts against the circumferential surface of the second truncated cone 14, forcing the second truncated cone 14 to slide upward relative to the fixed shaft 12. When the second truncated cone 14 contacts the first truncated cone 13, the inner end of the pin 18 sweeps across the contact line between the second truncated cone 14 and the first truncated cone 13 and contacts the circumferential surface of the first truncated cone 13. The security monitoring device 2 continues to move downward. The monitoring device 2 can be disassembled by pulling out the fixed shaft 12, the first frustum 13, and the second frustum 14 from the vertical hole 17 of the drive motor output shaft 3. During installation, the security monitoring device 2 is held and the first frustum 13 is inserted into the vertical hole 17 of the drive motor output shaft 3 and pushed upward. The circumferential surface of the first frustum 13 contacts the inner end of the pin 18, forcing the pin 18 to move outward and compressing the spring 20. When the inner end of the pin 18 brushes past the bottom surface of the first frustum 13, the pin 18 moves inward under the pushing force of the spring 20, so that the inner end of the pin 18 is inserted into the insertion hole 16 of the fixed shaft 12, thus completing the installation. In use, the drive motor rotates through the drive motor output shaft 3, causing the drive motor output shaft 3 to drive the pin 18 to rotate. The second pin 18 drives the fixed shaft 12 to rotate, which in turn drives the security monitoring device 2 to rotate, enabling the security monitoring device 2 to perform 360-degree detection of the room.

Claims

1. An Internet of Things based smart home security device, characterized in that: The utility model provides an electric power device (1), the bottom of electric power device (1) is provided with security monitoring device (2), the inside fixed mounting of electric power device (1) has circuit board (6), the upper end surface of circuit board (6) is fixedly provided with drive device (7), drive device (7) is provided with drive motor and reciprocating cycle stop control module in the inside, drive motor output shaft (3) protrude from the lower end surface of electric power device (1) and with security monitoring device (2) fixed setting.

2. The Internet of Things based smart home security device according to claim 1, characterized in that: The outer surface of the security monitoring device (2) is provided with a networking mechanism (5), and the top of the circuit board (6) is provided with a control module mechanism (8) for controlling the drive motor and the security monitoring device (2). A plurality of plug-in holes (9) are formed in the side surface of the control module mechanism (8) close to the drive device (7). A plurality of plug-in holes (9) are formed in the drive device (7). The control module mechanism (8) and the drive device (7) are electrically connected. A network connection module (11) is arranged on the top of the circuit board (6). A plurality of self-checking control modules (10) are arranged on the top of the circuit board (6). 3.The smart home security device based on Internet of Things according to claim 2, characterized in that: The upper end surface of the security monitoring device (2) is fixedly provided with a fixed shaft (12), and the fixed shaft (12) and the drive motor output shaft (3) are connected through a quick release mechanism.

4. The Internet-of-Things based smart home security device according to claim 3, characterized in that: The quick release mechanism includes a first circular table (13) fixedly connected to the top end of the fixed shaft (12), and a second circular table (14) invertedly sleeved on the fixed shaft (12). The second circular table (14) is located below the first circular table (13). A blocking plate (15) is fixedly arranged on the fixed shaft (12) below the second circular table (14). A plug hole (16) is formed in the fixed shaft (12) between the first circular table (13) and the second circular table (14).

5. The Internet of Things based smart home security device according to claim 4, characterized in that: The quick release mechanism further includes a vertical hole (17) formed in the lower end surface of the drive motor output shaft (3) and adapted to the first circular table (13) and the second circular table (14), and a plug pin (18) radially slidingly arranged on the drive motor output shaft (3). An inclined surface (19) is formed in the lower end surface of the plug pin (18). A spring (20) is arranged on the plug pin (18) to drive the plug pin (18) to always move inward. 6.The smart home security device based on Internet of Things according to claim 5, characterized in that: The vertical hole (17) of the drive motor output shaft (3) is provided with two symmetrical planes (21). Two symmetrical vertical planes (22) are formed in the first circular table (13) and the second circular table (14) and adapted to the planes (21) of the vertical hole (17). 7.The smart home security device based on Internet of Things according to claim 6, characterized in that: A housing (23) is fixedly arranged on the outer surface of the drive motor output shaft (3) corresponding to the position of the plug pin (18). The plug pin (18) is slidingly arranged in the housing (23) along the radial direction of the drive motor output shaft (3). A guide rod (24) is fixedly arranged on the outer side surface of the plug pin (18). The guide rod (24) protrudes from the outer end surface of the housing (23) and is fixedly provided with an end plate (25). 8.The smart home security device based on Internet of Things according to claim 7, characterized in that: The spring (20) is sleeved on the guide rod (24) between the end plate (25) and the shell (23), the inner end of the spring (20) is fixedly arranged on the shell (23), the outer end of the spring (20) is fixedly arranged on the end plate (25), and the spring (20) drives the guide rod (24) to always move inward. 9.The smart home security device based on Internet of Things according to claim 8, characterized in that: The inner side of the end plate (25) is fixedly provided with an indication sleeve (26) around the guide rod (24); when the bolt (18) is inserted into the insertion hole (16) of the fixed shaft (12), the guide rod (24) drives the indication sleeve (26) to move inward through the end plate (25), so that the inner side of the indication sleeve (26) is in contact with the outer end surface of the shell (23). 10.The smart home security device based on Internet of Things according to claim 5, characterized in that: The spring (20) is located in the indication sleeve (26), and a plurality of observation openings (27) are formed in the indication sleeve (26).

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