A video surveillance device

Abstract

This invention relates to the technical field and discloses a video surveillance device, which includes a pan-tilt base, a pan-tilt body, an end cover, a camera component, a drive component, a control unit, and a mobile terminal. Compared to traditional telescopic dome cameras, which are controlled remotely from the back end, this video surveillance device can be remotely controlled via a mobile terminal connected to the back end. On-site personnel can also directly control the pan-tilt body and camera components via the mobile terminal, facilitating real-time adjustments by on-site personnel. The device also allows for previewing of captured footage, improving the convenience of monitoring and adjustments. Furthermore, this video surveillance device comes with a built-in mobile terminal, which can be used to install an app for functions such as facial recognition and landmark check-in, offering scalable multi-functionality. Additionally, the mobile terminal can be used independently for handheld close-range monitoring, further facilitating real-time monitoring collaboration between on-site personnel and remote back-end personnel.

Description

Technical Field

[0001] This invention relates to the field of technology, and in particular to a video surveillance device. Background Technology

[0002] A PTZ (Polygon-to-Polygon) is a video surveillance device that is easy to deploy. It is often used for temporary high-definition video surveillance, such as construction site safety monitoring. PTZs are typically deployed at construction sites to monitor the construction progress.

[0003] Chinese patent “ZL202110011775.9 (A type of surveillance ball)” discloses a surveillance ball, including a pan-tilt unit and a lens assembly fixed to the pan-tilt unit. However, this type of surveillance ball video monitoring device only has video monitoring function and poor expandability. When operators go to the site to set up and adjust, the human-computer interaction is poor and the image cannot be previewed in real time when adjusting the lens on site. Summary of the Invention

[0004] The purpose of this invention is to provide a video surveillance device.

[0005] To achieve the above objectives, the present invention provides a video surveillance device, comprising:

[0006] Gimbal base;

[0007] The gimbal body is rotatably connected to the gimbal base. The gimbal body is provided with a mounting slot and a placement position. The mounting slot and the placement position are staggered. The placement position is provided with a connection terminal.

[0008] An end cap, hinged to the gimbal body, is used to open and close the placement position;

[0009] The camera component is rotatably connected to the mounting slot;

[0010] A drive component is used to control the rotation of the gimbal body and the camera component;

[0011] The control unit is electrically connected to both the camera component and the drive assembly.

[0012] The mobile terminal is placed in the placement position and electrically connected to the control unit through the connection terminal.

[0013] In some embodiments of this application, the mobile terminal includes a housing, a processor, a display, a front-facing camera, and a rear-facing camera. The processor is disposed within the housing and is electrically connected to the display, the control unit, the front-facing camera, and the rear-facing camera. The display is disposed on the front side of the housing and is positioned away from the placement location. The front-facing camera and the rear-facing camera are respectively disposed on the front and rear sides of the housing.

[0014] In some embodiments of this application, when electrically connected to the control unit, the processor is configured to:

[0015] Control the start, stop, and rotation of the camera component;

[0016] Control the rotation of the gimbal body;

[0017] Turn off the rear camera;

[0018] Control the start, stop, and focus of the front-facing camera;

[0019] When disconnected from the control unit, the processor is configured to:

[0020] Control the start and stop of the rear camera;

[0021] Control the start and stop of the front-facing camera.

[0022] In some embodiments of this application, when the processor is disconnected from the control unit, the control unit is configured to:

[0023] The drive component controls the pan-tilt unit and the camera component to rotate to a predetermined position.

[0024] In some embodiments of this application, the placement position is located on the side opposite to the mounting groove.

[0025] In some embodiments of this application, an even number of locking protrusions are provided on the edge of the placement position, and the locking protrusions are symmetrically arranged in pairs on both sides of the placement position;

[0026] The two sides of the housing are provided with slots, and the number of slots and the number of protrusions are equal and correspond one-to-one. The protrusions are inserted into the slots to make the mobile terminal and the gimbal body engage.

[0027] In some embodiments of this application, the camera component can be in an open state and an closed state;

[0028] When the camera component is in the open state, the camera component is positioned facing outward and protrudes from the outer peripheral wall of the gimbal body;

[0029] When the camera component is in the closed state, the camera component is positioned facing the bottom surface of the mounting slot, and the camera component does not protrude from the outer peripheral wall of the gimbal body.

[0030] In some embodiments of this application, the bottom surface of the mounting groove is inclined downwards from the inside to the outside to form a guide slope.

[0031] In some embodiments of this application, the gimbal base is provided with a gear ring, the drive assembly includes a first motor, the first motor is disposed in the gimbal body and connected to the gimbal body, the output shaft of the first motor is vertically downward and connected to a drive gear, the drive gear meshing with the gear ring;

[0032] The control unit is electrically connected to the first motor.

[0033] In some embodiments of this application, the gimbal body is provided with a driven wheel that is pulsatorically connected to the camera component;

[0034] The drive assembly includes a second motor, which is disposed within the gimbal body. The output shaft of the second motor is arranged in a horizontal direction and connected to a drive wheel. The drive wheel and the driven wheel are connected by a transmission belt or a transmission chain.

[0035] The control unit is electrically connected to the second motor.

[0036] This invention provides a video surveillance device, which has the following advantages compared with the prior art:

[0037] The video surveillance device provided by this invention includes a pan-tilt base, a pan-tilt body, an end cap, a camera component, a drive component, a control unit, and a mobile terminal. The pan-tilt body is rotatably connected to the pan-tilt base and has a mounting slot and a placement position, which are staggered. The placement position has a connection terminal. The end cap is hinged to the pan-tilt body and is used to open and close the placement position. The camera component is rotatably connected to the mounting slot. The drive component controls the rotation of the pan-tilt body and the camera component. The control unit is electrically connected to both the camera component and the drive component. The mobile terminal is placed in the placement position and is electrically connected to the control unit via the connection terminal. Based on the above structure, compared to traditional PTZ cameras where control is performed remotely from the back end, this video surveillance device features human-computer interaction. It can be remotely controlled via a mobile terminal connected to the back end, or field personnel can directly control the pan-tilt unit and camera components via the mobile terminal. This facilitates real-time adjustments by field personnel and allows for previewing of captured footage, improving the convenience of monitoring and adjustments. Secondly, this video surveillance device comes with a built-in mobile terminal, which can be used to install apps for functions such as facial recognition and landmark check-in, offering scalable multi-functionality. Furthermore, since the mobile terminal can be hot-swapped to connect or disconnect from the control unit, it can be used independently for handheld close-range monitoring, facilitating real-time monitoring collaboration between field personnel and remote back-end personnel. Attached Figure Description

[0038] Figure 1This is a schematic diagram of the overall structure of the video surveillance device according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the video surveillance device in the embodiment of the present invention when the camera component is in the off state;

[0040] Figure 3 This is a schematic diagram of the video surveillance device in the embodiment of the present invention when the camera component is in the open state;

[0041] Figure 4 This is a schematic diagram of the structure of the video surveillance device according to an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the structure of a video surveillance device (excluding the end cover and mobile terminal) according to an embodiment of the present invention;

[0043] Figure 6 This is a schematic diagram of the video surveillance device (without the camera component) according to an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the structure of a mobile terminal according to an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the structure of a mobile terminal according to an embodiment of the present invention;

[0046] Figure 9 This is a partial structural diagram of the gimbal body according to an embodiment of the present invention;

[0047] Figure 10 This is a partial structural diagram of the video surveillance device according to an embodiment of the present invention;

[0048] Figure 11 This is a partial structural diagram of the driving component according to an embodiment of the present invention.

[0049] In the diagram: 1. Gimbal base; 11. Gear ring; 2. Gimbal body; 21. Mounting slot; 211. Guide slope; 22. Placement position; 221. Locking protrusion; 3. End cap; 4. Camera component; 51. First motor; 52. Drive gear; 53. Second motor; 54. Drive wheel; 55. Driven wheel; 6. Mobile terminal; 61. Housing; 611. Locking slot; 62. Display; 63. Front camera; 64. Rear camera. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0051] It should be understood that in the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. 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. That is, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, unless otherwise stated, "a plurality of" means two or more.

[0052] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] like Figures 1 to 6 As shown, this embodiment of the invention provides a video surveillance device, which includes a pan-tilt base 1, a pan-tilt body 2, an end cover 3, a camera component 4, a drive component, a control unit, and a mobile terminal 6.

[0054] The gimbal body 2 is rotatably connected to the gimbal base 1. The gimbal body 2 is provided with a mounting groove 21 and a placement position 22, which are staggered. Preferably, the placement position 22 is located on the side opposite to the mounting groove 21. The placement position 22 is provided with a connection terminal. The connection terminal can be a terminal with a connecting wire, or it can be a contact terminal or other similar device.

[0055] The end cap 3 is hinged to the gimbal body 2 and is used to open and close the placement position 22. The gimbal body 2 is equipped with a latch or sliding unlocking device, which can lock or release the end of the end cap 3 away from the hinge.

[0056] The camera component 4 is rotatably connected to the mounting slot 21. The drive assembly controls the rotation of the pan-tilt body 2 and the camera component. The control unit is electrically connected to both the camera component and the drive assembly. The mobile terminal 6 is placed in the placement position 22 and is electrically connected to the control unit via a connection terminal.

[0057] Based on the above structure, compared to traditional PTZ cameras where control is performed remotely from the back end, this video surveillance device features human-computer interaction. It can be remotely controlled via a mobile terminal 6 connected to the back end, or field personnel can directly control the pan-tilt unit 2 and camera components via the mobile terminal 6. This facilitates real-time adjustments to the video surveillance device by field personnel and allows for previewing of captured footage via the mobile terminal 6, improving the convenience of monitoring adjustments. Secondly, this video surveillance device comes with a built-in mobile terminal 6, which can be used to install an app for functions such as facial recognition and landmark check-in, offering expandable multi-functionality. Furthermore, since the mobile terminal 6 can be hot-swapped to connect or disconnect from the control unit, it can be used independently for handheld close-range monitoring, facilitating real-time monitoring collaboration between field personnel and remote back-end personnel.

[0058] Optionally, such as Figures 7 to 8 As shown, in this embodiment, the mobile terminal 6 includes a housing 61, a processor, a display 62, a front-facing camera 63, and a rear-facing camera 64. The processor is disposed within the housing 61 and is electrically connected to the display 62, the control unit, the front-facing camera 63, and the rear-facing camera 64. The display 62 is disposed on the front side of the housing 61, away from the placement position 22. The front-facing camera 63 and the rear-facing camera 64 are respectively disposed on the front and rear sides of the housing 61. The housing 61 is provided with a terminal interface, which can be designed as a USB interface, a Type-C interface, or a contact point, for plugging and unplugging connections with connection terminals. The terminal interface can be specifically disposed on the rear surface of the housing 61 or on the top, bottom, left, or right sides. In this embodiment, the terminal interface is disposed on the rear side of the housing 61 and adopts the form of a contact point. The rear-facing camera 64 is used for close-range video shooting when handheld and moved. The rear camera 64 features an infrared array, low power consumption, and a maximum illumination distance of 30 meters. It automatically switches between day and night modes, activating infrared functionality in complete darkness or low-light conditions, automatically switching from color to black and white ICR for infrared night vision video. The front camera 63 is used for facial recognition and video calls. The display is a touchscreen.

[0059] The processor adopts a mature MTK industrial-grade main control design, featuring an integrated 4G / 5G communication module. It is a highly integrated baseband platform capable of running the Android system and installing multiple apps. The processor can integrate a CPU, GPU, 4G / 5G communication module, WiFi module, Bluetooth module, display module, Type-C module, front and rear camera modules, storage module, GPS module, power management module, gyroscope, etc., enabling the mobile terminal 6 to possess multiple functions similar to a law enforcement recorder, including video recording, video storage, video uploading, and interface with remote platforms, as follows:

[0060] (1) Video shooting: The Android system of the mobile terminal 6 has a video shooting application running in the background service. It automatically starts up and enters the video shooting mode without manual intervention or triggering.

[0061] (2) Video storage: The system calls the GPU to write the captured camera video stream into the memory card in a certain video compression format to realize the local storage of the surveillance video, ensure the synchronous backup of the surveillance video, and also realize the alarm prompt when the memory card is not installed or is abnormal, so as to prevent the backup from failing.

[0062] (3) Video upload: The collected camera video stream is uploaded to the remote platform in real time via the 4G / 5G communication module using the GB28281 standard protocol. In addition, it can be used with the corresponding application configuration interface to facilitate users to view and modify information such as server SIP, port, and registration password.

[0063] (4) The mobile terminal 6 connects with the remote platform. The mobile terminal 6 connects with the remote platform through the 4G / 5G communication module to realize functions such as device registration, management and connection.

[0064] Because the control unit eliminates the need for image processing chips, wireless communication modules, and storage modules, a smaller MCU control board can be used. The corresponding functions are integrated into the mobile terminal 6, implemented using a highly integrated processor that supports function expansion. Therefore, this video surveillance device can further reduce product weight and size, greatly improving its portability.

[0065] Optionally, such as Figure 5 and Figure 7 As shown, in this embodiment, an even number of latching protrusions 221 are erected on the edge of the placement position 22, and the latching protrusions 221 are symmetrically arranged in pairs on both sides of the placement position 22.

[0066] The housing 61 has slots 611 on both sides of its edge. The number of slots 611 and protrusions 221 are equal and correspond one-to-one. The protrusions 221 are inserted into the slots 611 to engage the mobile terminal 6 and the gimbal body 2. This ensures that the mobile terminal 6 is securely engaged when placed in the placement position 22, preventing slippage. When the mobile terminal 6 needs to be held in hand, it can be pulled out, disengaging the slots 611 and protrusions 221.

[0067] Optionally, such as Figures 2 to 3 As shown, in this embodiment, the camera component 4 can be in an open state and a closed state. When the camera component 4 is in the open state, it faces outward and protrudes from the outer peripheral wall of the gimbal body 2. When the camera component 4 is in the closed state, it faces the bottom surface of the mounting groove 21 and does not protrude from the outer peripheral wall of the gimbal body 2. Preferably, when the camera component 4 is in the closed state, its outer wall is flush with the outer peripheral wall of the gimbal body 2, forming a columnar surface. This maintains an aesthetically pleasing appearance while preventing the camera component 4 from colliding with objects when closed, making it portable and less prone to damage. The camera component 4 is specifically a zoom camera, preferably with a 25x zoom lens, and has infrared night vision capabilities.

[0068] Considering that the mounting slot 21 is prone to water accumulation when using this video surveillance device in rainy weather, alternatively, such as Figure 6 As shown, in this embodiment, the bottom surface of the mounting groove 21 is inclined downwards from the inside to the outside to form a guide slope 211. The bottom surface of the mounting groove 21 can be either a straight slope or an inclined arc surface. In this way, regardless of whether the camera component 4 is in the open or closed state, when rainwater enters the mounting groove 21 from the gap between the camera component 4 and the gimbal body 2, the rainwater can be smoothly discharged out of the gimbal body 2 through the guide slope 211, avoiding water accumulation in the mounting groove 21.

[0069] Optionally, such as Figure 9 and Figure 10 As shown, in this embodiment, the gimbal base 1 is provided with a gear ring 11. The drive assembly includes a first motor 51 and a drive gear 52. The first motor 51 is disposed inside the gimbal body 2 and is connected to the gimbal body 2. The output shaft of the first motor 51 is vertically downward and is connected to the drive gear 52. The drive gear 52 is eccentrically positioned relative to the rotation axis of the gimbal body. The gear ring 11 is coaxially positioned with the gimbal body 2, and the drive gear 52 meshes with the gear ring 11. The control unit is electrically connected to the first motor 51. When the first motor 51 rotates, it drives the drive gear 52 to rotate, thereby causing the gimbal body 2 and the gear ring 11 to rotate relative to each other. Thus, the mobile terminal 6 and / or the control unit can control the first motor 51 to start, thereby enabling the gimbal body 2 to rotate around the vertical axis.

[0070] Optionally, such as Figure 11 As shown, in this embodiment, the drive assembly further includes a second motor 53, a drive wheel 54, and a driven wheel 55. The second motor 53 is disposed inside the gimbal body 2, and its output shaft is arranged horizontally and is connected to the drive wheel 54. The drive wheel 54 and the driven wheel 55 are connected by a drive belt or a drive chain, and the driven wheel 55 is connected to the camera component 4. Thus, the mobile terminal 6 and / or the control unit can control the second motor 53 to start, thereby enabling the camera to rotate around the horizontal axis. Preferably, the gimbal body 2 is designed with horizontal and vertical limit bolts (not shown in the figure), each with a limit function implemented by two microswitches. When the rotation angle reaches the preset limit bolt, the microswitches activate to cut off the power, and the gimbal stops rotating. In addition, the angle parameters adjusted by the user can be stored in the control unit to realize the function of quickly switching preset points of the gimbal body 2.

[0071] Optionally, in this embodiment, the following is the control logic of the video surveillance device. This video surveillance device is mainly controlled by the mobile terminal 6, which can be operated on-site by personnel via a touch display, or remotely by back-end personnel via a communication module or wireless module. When electrically connected to the control unit, the processor is configured as follows:

[0072] (1) Control the start, stop and rotation of the camera component 4;

[0073] (2) Control the rotation of the gimbal body 2;

[0074] (3) Turn off the rear camera 64;

[0075] (4) Control the start, stop and focus of the front camera 63.

[0076] It should be understood that the processor can perform any of the above functions.

[0077] In other words, when electrically connected to the control unit, the camera component 4 is primarily used for monitoring, shooting, and previewing, while the rear camera 64 remains off. Taking focusing as an example, specifically, the mobile terminal 6 sends a zoom command to the control unit via the terminal interface and connection terminal. The control unit executes this zoom command, controlling the position of the spring or mover by changing the magnitude of the coil current within the lens motor of the camera component 4, thereby moving the lens and achieving zoom. After zooming, focus adjustment is required. Focusing does not change the focal length of the lens but rather the image distance. The distance between the imaging plane and the lens is adjusted by moving certain lenses within the entire lens back and forth, causing the image plane to coincide with the focal plane of the image sensor, thus receiving a clear image. This ensures that the distance from the imaging plane to the optical center equals the image distance, allowing the object to be clearly imaged onto the photosensitive element. The image data information collected by the camera component 4 is sent to the mobile terminal 6 through the signal transmission module. The processor can store it locally through the storage module, or upload it to the remote platform through the 4G communication module. Of course, the mobile terminal 6 can also display the image collected by the camera component 4 on the screen so that the operator can preview the shooting scene and adjust the shooting angle in real time.

[0078] When disconnected from the control unit, the processor is configured as follows:

[0079] (1) Control the start and stop of the rear camera 64;

[0080] (2) Control the start and stop of the front camera 63.

[0081] Optionally, such as Figure 1 As shown, in this embodiment, when the processor is disconnected from the control unit, the control unit is configured to:

[0082] The gimbal body 2 and camera component 4 are controlled to rotate to a predetermined position by the drive component. Of course, it is also possible to keep the real-time angle of the gimbal body 2 constant.

[0083] In summary, this invention provides a video surveillance device, which mainly comprises a pan-tilt base 1, a pan-tilt body 2, an end cap 3, a camera component 4, a drive component, a control unit, and a mobile terminal 6. The pan-tilt body 2 is rotatably connected to the pan-tilt base 1. The pan-tilt body 2 is provided with a mounting slot 21 and a placement position 22, which are staggered. The placement position 22 is provided with a connection terminal. The end cap 3 is hinged to the pan-tilt body 2 and is used to open and close the placement position 22. The camera component 4 is rotatably connected to the mounting slot 21. The drive component is used to control the rotation of the pan-tilt body 2 and the camera component. The control unit is electrically connected to both the camera component and the drive component. The mobile terminal 6 is placed in the placement position 22 and is electrically connected to the control unit through the connection terminal.

[0084] Compared with existing technologies, this video surveillance device has the following advantages:

[0085] 1. Compared to traditional PTZ cameras, which are controlled remotely from the back end, this video surveillance device features human-computer interaction. It can be remotely controlled via a mobile terminal connected to the back end, or field personnel can directly control the PTZ camera and camera components via the mobile terminal. This allows for real-time adjustments to the video surveillance device by field personnel, and also enables previewing of the captured footage via the mobile terminal, improving the convenience of monitoring and adjustment.

[0086] 2. This video surveillance device comes with a mobile terminal, which can be installed with an app at any time to achieve functions such as facial recognition and landmark check-in, and has expandable multi-functionality; in addition, since the mobile terminal can be connected or disconnected from the control unit through hot-swapping, the mobile terminal can be used independently for handheld close-range monitoring, creating a brand-new real-time monitoring method, which is more convenient for on-site personnel and remote back-end personnel to cooperate in real-time monitoring.

[0087] 3. Regardless of whether the camera component is in the open or closed state, when rainwater enters the mounting slot through the gap between the camera component and the gimbal body, the rainwater can be smoothly discharged out of the gimbal body through the guide slope, avoiding water accumulation in the mounting slot.

[0088] 4. Because the control unit eliminates the need for image processing chips, wireless communication modules, and storage modules, a smaller MCU control board can be used. The corresponding functions are integrated into the mobile terminal using a highly integrated processor that supports function expansion. Therefore, this video surveillance device can further reduce product weight and size, greatly improving its portability.

[0089] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A video surveillance device, characterized in that, include: Gimbal base; The gimbal body is rotatably connected to the gimbal base. The gimbal body is provided with a mounting slot and a placement position. The mounting slot and the placement position are staggered. The placement position is provided with a connection terminal. An end cap, hinged to the gimbal body, is used to open and close the placement position; The camera component is rotatably connected to the mounting slot; A drive component is used to control the rotation of the gimbal body and the camera component; The control unit is electrically connected to both the camera component and the drive assembly. A mobile terminal is placed in the placement position and electrically connected to the control unit through the connection terminal. The mobile terminal is connected to or disconnected from the control unit by hot-plugging. The gimbal base is provided with a gear ring, and the drive assembly includes a first motor and a drive gear. The first motor is disposed in the gimbal body and is connected to the gimbal body. The output shaft of the first motor is vertically downward and is connected to the drive gear. The drive gear is eccentrically disposed with respect to the rotation axis of the gimbal body. The gear ring is coaxially disposed with the gimbal body, and the drive gear meshes with the gear ring. The control unit is electrically connected to the first motor.

2. The video surveillance device as described in claim 1, characterized in that: The mobile terminal includes a housing, a processor, a display, a front-facing camera, and a rear-facing camera. The processor is disposed inside the housing and is electrically connected to the display, the control unit, the front-facing camera, and the rear-facing camera. The display is disposed on the front side of the housing and is positioned away from the placement position. The front-facing camera and the rear-facing camera are respectively disposed on the front and rear sides of the housing.

3. The video surveillance device as described in claim 2, characterized in that: When electrically connected to the control unit, the processor is configured to: Control the start, stop, and rotation of the camera component; Control the rotation of the gimbal body; Turn off the rear camera; Control the start, stop, and focus of the front-facing camera; When disconnected from the control unit, the processor is configured to: Control the start and stop of the rear camera; Control the start and stop of the front-facing camera.

4. The video surveillance device as described in claim 3, characterized in that: When the processor is disconnected from the control unit, the control unit is configured to: The drive component controls the pan-tilt unit and the camera component to rotate to a predetermined position.

5. The video surveillance device as described in claim 1, characterized in that: The placement position is located on the side opposite to the mounting slot.

6. The video surveillance device as described in claim 2, characterized in that: An even number of locking protrusions are provided on the edge of the placement position, and the locking protrusions are symmetrically arranged in pairs on both sides of the placement position; The two sides of the housing are provided with slots, and the number of slots and the number of protrusions are equal and correspond one-to-one. The protrusions are inserted into the slots to make the mobile terminal and the gimbal body engage.

7. The video surveillance device as described in claim 1, characterized in that: The camera component can be in an on state and an off state; When the camera component is in the open state, the camera component is positioned facing outward and protrudes from the outer peripheral wall of the gimbal body; When the camera component is in the closed state, the camera component is positioned facing the bottom surface of the mounting slot, and the camera component does not protrude from the outer peripheral wall of the gimbal body.

8. The video surveillance device as described in claim 7, characterized in that: The bottom surface of the mounting groove is inclined downwards from the inside to the outside to form a guide slope.

9. The video surveillance device as described in claim 1, characterized in that: The drive assembly further includes a second motor, a drive wheel, and a driven wheel. The second motor is disposed within the gimbal body. The output shaft of the second motor is arranged in a horizontal direction and is drivenly connected to the drive wheel. The drive wheel and the driven wheel are drivenly connected via a drive belt or a drive chain. The driven wheel is drivenly connected to the camera component. The control unit is electrically connected to the second motor.

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