Multi-camera signal switching device

Abstract

The utility model relates to the technical field of image processing, in particular to a multi-camera signal switching device which is applied to intelligent equipment, the intelligent equipment is provided with a main control board, and the multi-camera signal switching device comprises a first interface circuit and a second interface circuit used for being connected with other equipment with a USB (Universal Serial Bus) interface; through the arrangement of the first interface circuit and the second interface circuit, the USB camera module can be directly installed on a matched intelligent device in a modularized mode and can also be connected to other devices with USB interfaces through USB lines. The double-interface design greatly improves the connection flexibility of the equipment, and meets the use requirements in different scenes. Compared with a traditional built-in integrated USB camera module, the built-in integrated USB camera module supports two modes of direct modular installation and USB connection, breaks through the limitation of built-in integration, reduces the pulling and bending conditions of wires, and improves the use reliability of the USB camera module. The device is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of image processing technology, specifically to a multi-camera signal switching device. Background Technology

[0002] With the widespread adoption of smart devices, users' demand for multimedia functions is increasing, and cameras, as key components, are playing an increasingly important role in various electronic devices. However, traditional USB camera modules face many challenges in their application.

[0003] On the one hand, many traditional USB camera modules are directly integrated inside electronic products. This integration method results in a fixed camera position, making it difficult for users to effectively adjust its angle in different scenarios. For example, in photography scenarios requiring a specific shooting angle, or during video conferencing, the fixed camera angle often fails to meet the needs, greatly limiting the user's flexibility. Moreover, when these integrated cameras malfunction, their unique installation location and complex integration make repairs quite difficult. Repairs often require specialized technicians with specialized tools, which undoubtedly increases repair costs and consumes a significant amount of time.

[0004] On the other hand, some USB camera modules that use external connections connect to the device via a USB cable. While this connection method offers some flexibility, the USB cable is easily subjected to pulling and bending during frequent daily use. These external forces can damage the internal circuitry of the USB cable or cause the interface to loosen, thus seriously affecting the normal operation of the USB camera module and reducing the user experience. Utility Model Content

[0005] To address the shortcomings and deficiencies of existing technologies, this invention provides a multi-camera signal switching device that reduces cable pulling and bending, thereby improving the reliability of USB camera modules.

[0006] To achieve the above objectives, the present invention provides a multi-camera signal switching device for use in smart devices. The smart device has a main control board. The multi-camera signal switching device includes a first interface circuit, a second interface circuit for connecting to other devices with USB interfaces, a camera control signal interface circuit, and a USB switch switching circuit. The main control board's interface is electrically connected to the first interface circuit. The USB switch switching circuit is electrically connected to the first interface circuit, the second interface circuit, and the camera control signal interface circuit. The camera control signal interface circuit is electrically connected to a USB camera module.

[0007] Further; the USB switch circuit includes a switch chip, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; the third and fourth pins of the switch chip are electrically connected to the camera control signal interface circuit; one end of the first resistor is electrically connected to the ninth pin of the switch chip, and the other end is electrically connected to the first interface circuit; one end of the second resistor is electrically connected to the eighth pin of the switch chip, and the other end is electrically connected to the first interface circuit; one end of the third resistor is electrically connected to the seventh pin of the switch chip, and the other end is electrically connected to the second... The interface circuit is electrically connected; one end of the fourth resistor is electrically connected to the sixth pin of the switching chip, and the other end is electrically connected to the second interface circuit; the first pin of the switching chip is electrically connected to a 3.3V voltage, the fifth pin of the switching chip is grounded, the first capacitor and the second capacitor are connected in parallel, one end of which is electrically connected to the first pin of the switching chip, and the other end of which is electrically connected to the fifth pin of the switching chip; the sixth resistor and the seventh resistor are connected in series, one end of which is connected to a 5V voltage, and the other end is grounded; the second pin of the switching chip is electrically connected to the common terminal of the sixth resistor and the seventh resistor, and the tenth pin of the switching chip is grounded.

[0008] Furthermore, the camera control signal interface circuit includes a camera interface, a third capacitor, a fourth capacitor, a first TVS protection diode, and a second TVS protection diode. The first pin of the camera interface is connected to a 5V voltage, the fourth pin of the camera interface is grounded, and the second pin of the camera interface is electrically connected to the fourth pin of the switching chip. The third pin of the camera interface is electrically connected to the third pin of the switching chip. One end of the third capacitor is grounded, and the other end is electrically connected to the first pin of the switching chip. One end of the fourth capacitor is grounded, and the other end is electrically connected to the first pin of the switching chip. One end of the first TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the switching chip. One end of the second TVS protection diode is grounded, and the other end is electrically connected to the third pin of the switching chip.

[0009] Further, the first interface circuit includes a first interface, a diode, a third TVS protection diode, a fourth TVS protection diode, a fifth capacitor, and a sixth capacitor; the first pin of the first interface is connected to a 5V voltage, one end of the diode is connected to a 5V voltage, and the other end is electrically connected to the first pin of the first interface; the second pin of the first interface is electrically connected to the eighth pin of the switching chip, and the third pin of the first interface is electrically connected to the ninth pin of the switching chip; one end of the third TVS protection diode is grounded, and the other end is electrically connected to the second pin of the first interface; one end of the fourth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the first interface; one end of the fifth capacitor is grounded, and the other end is electrically connected to the first pin of the first interface; one end of the sixth capacitor is grounded, and the other end is electrically connected to the first pin of the first interface.

[0010] Further; the second interface circuit includes a second interface, a fifth TVS protection diode, a sixth TVS protection diode, a seventh capacitor, an eighth capacitor, an eighth resistor, and a ninth resistor; one end of the fifth TVS protection diode is grounded, and the other end is electrically connected to the seventh B pin of the second interface; one end of the sixth TVS protection diode is grounded, and the other end is electrically connected to the sixth B pin of the second interface; the sixth A pin of the second interface is electrically connected to the seventh pin of the switching chip, and the seventh A pin of the second interface is electrically connected to the sixth pin of the switching chip; one end of the eighth resistor is grounded, and the other end is electrically connected to the fifth A pin of the second interface; the fourth A pin of the second interface is connected to a 5V voltage; one end of the seventh capacitor is grounded, and the other end is connected to the second… The fourth A pin of the interface is electrically connected; the ninth A pin of the second interface is electrically connected to the fourth A pin of the second interface, one end of the ninth resistor is grounded, and the other end is electrically connected to the fifth B pin of the second interface; the fourth B pin of the second interface is connected to a 5V voltage, one end of the eighth capacitor is grounded, and the other end is electrically connected to the fourth B pin of the second interface; the ninth B pin of the second interface is electrically connected to the fourth B pin of the second interface; the first B pin of the second interface is grounded, and the first B pin of the second interface is electrically connected to the twelfth B pin of the second interface; the first A pin of the second interface is grounded, and the twelfth A pin, first pin, second pin, third pin, and fourth pin of the second interface are all electrically connected to the first A pin of the second interface.

[0011] Furthermore, the model number of the switch chip is SGM7227.

[0012] Furthermore, the model number of the USB camera module is GC2053.

[0013] The beneficial effects of this utility model are:

[0014] This invention provides a multi-camera signal switching device. By setting a first interface circuit and a second interface circuit, the USB camera module can be modularly installed directly on a matching smart device, or connected to other devices with USB interfaces via a USB cable. This dual-interface design greatly improves the device's connection flexibility and meets the needs of different scenarios. Compared with traditional built-in integrated USB camera modules, this application supports both direct modular installation and USB connection, breaking through the limitations of built-in integration, reducing cable pulling and bending, and improving the reliability of the USB camera module. Whether for initial installation or subsequent upgrades, expansions, repairs, or replacements, it becomes very convenient and quick, reducing the user's operational difficulty and time costs. Furthermore, the switching circuit can automatically identify which interface is currently supplying power and select the correct signal path accordingly, ensuring that the USB camera module can be correctly identified and operate in different connection modes. This not only simplifies the user's operation steps but also ensures the accuracy and efficiency of data transmission. This application is not only simple in structure but also has low manufacturing costs. Attached Figure Description

[0015] Figure 1 This is a schematic block diagram of a multi-camera signal switching device according to the present invention;

[0016] Figure 2 This is a circuit diagram of the USB switch switching circuit in a multi-camera signal switching device according to the present invention.

[0017] Figure 3 This is a circuit diagram of the camera control signal interface circuit in a multi-camera signal switching device of this utility model;

[0018] Figure 4 This is a circuit diagram of the first interface circuit in a multi-camera signal switching device of the present invention.

[0019] Figure 5 This is a circuit diagram of the second interface circuit in a multi-camera signal switching device of this utility model. Detailed Implementation

[0020] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0023] This utility model proposes a multi-camera signal switching device.

[0024] In the embodiments of this utility model, such as Figure 1-5 As shown, this multi-camera signal switching device is applied to a smart device. The smart device is equipped with a main control board. The multi-camera signal switching device includes a first interface circuit, a second interface circuit for connecting to other devices with USB interfaces, a camera control signal interface circuit, and a USB switch switching circuit. The interface of the main control board is electrically connected to the first interface circuit, and the USB switch switching circuit is electrically connected to the first interface circuit, the second interface circuit, and the camera control signal interface circuit. The camera control signal interface circuit is electrically connected to a USB camera module.

[0025] In this embodiment, the USB switch circuit includes a switch chip, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor. The third and fourth pins of the switch chip are electrically connected to the camera control signal interface circuit. One end of the first resistor is electrically connected to the ninth pin of the switch chip, and the other end is electrically connected to the first interface circuit. One end of the second resistor is electrically connected to the eighth pin of the switch chip, and the other end is electrically connected to the first interface circuit. One end of the third resistor is electrically connected to the seventh pin of the switch chip, and the other end is electrically connected to the... The two interface circuits are electrically connected; one end of the fourth resistor is electrically connected to the sixth pin of the switching chip, and the other end is electrically connected to the second interface circuit; the first pin of the switching chip is electrically connected to a 3.3V voltage, the fifth pin of the switching chip is grounded, the first capacitor and the second capacitor are connected in parallel, one end of which is electrically connected to the first pin of the switching chip, and the other end of which is electrically connected to the fifth pin of the switching chip; the sixth resistor and the seventh resistor are connected in series, one end of which is connected to a 5V voltage, and the other end is grounded; the second pin of the switching chip is electrically connected to the common terminal of the sixth resistor and the seventh resistor, and the tenth pin of the switching chip is grounded.

[0026] In this embodiment, the camera control signal interface circuit includes a camera interface, a third capacitor, a fourth capacitor, a first TVS protection diode, and a second TVS protection diode. The first pin of the camera interface is connected to a 5V voltage, the fourth pin of the camera interface is grounded, and the second pin of the camera interface is electrically connected to the fourth pin of the switching chip. The third pin of the camera interface is electrically connected to the third pin of the switching chip. One end of the third capacitor is grounded, and the other end is electrically connected to the first pin of the switching chip. One end of the fourth capacitor is grounded, and the other end is electrically connected to the first pin of the switching chip. One end of the first TVS protection diode is grounded, and the other end is electrically connected to the fourth pin of the switching chip. One end of the second TVS protection diode is grounded, and the other end is electrically connected to the third pin of the switching chip.

[0027] In this embodiment, the first interface circuit includes a first interface, a diode, a third TVS protection diode, a fourth TVS protection diode, a fifth capacitor, and a sixth capacitor. A first pin of the first interface is connected to a 5V voltage. One end of the diode is connected to a 5V voltage, and the other end is electrically connected to the first pin of the first interface. A second pin of the first interface is electrically connected to the eighth pin of the switching chip, and a third pin of the first interface is electrically connected to the ninth pin of the switching chip. One end of the third TVS protection diode is grounded, and the other end is electrically connected to the second pin of the first interface. One end of the fourth TVS protection diode is grounded, and the other end is electrically connected to the third pin of the first interface. One end of the fifth capacitor is grounded, and the other end is electrically connected to the first pin of the first interface. One end of the sixth capacitor is grounded, and the other end is electrically connected to the first pin of the first interface.

[0028] In this embodiment, the second interface circuit includes a second interface, a fifth TVS protection diode, a sixth TVS protection diode, a seventh capacitor, an eighth capacitor, an eighth resistor, and a ninth resistor. One end of the fifth TVS protection diode is grounded, and the other end is electrically connected to the seventh B pin of the second interface. One end of the sixth TVS protection diode is grounded, and the other end is electrically connected to the sixth B pin of the second interface. The sixth A pin of the second interface is electrically connected to the seventh pin of the switching chip, and the seventh A pin of the second interface is electrically connected to the sixth pin of the switching chip. One end of the eighth resistor is grounded, and the other end is electrically connected to the fifth A pin of the second interface. The fourth A pin of the second interface is connected to a 5V voltage. One end of the seventh capacitor is grounded, and the other end is connected to the fifth TVS protection diode. The fourth A pin of the second interface is electrically connected; the ninth A pin of the second interface is electrically connected to the fourth A pin of the second interface; one end of the ninth resistor is grounded, and the other end is electrically connected to the fifth B pin of the second interface; the fourth B pin of the second interface is connected to a 5V voltage; one end of the eighth capacitor is grounded, and the other end is electrically connected to the fourth B pin of the second interface; the ninth B pin of the second interface is electrically connected to the fourth B pin of the second interface; the first B pin of the second interface is grounded, and the first B pin of the second interface is electrically connected to the twelfth B pin of the second interface; the first A pin of the second interface is grounded, and the twelfth A pin, first pin, second pin, third pin, and fourth pin of the second interface are all electrically connected to the first A pin of the second interface.

[0029] In this embodiment, the switching chip is model SGM7227.

[0030] In this embodiment, the USB camera module is model GC2053.

[0031] This device features both POGOPIN and TYPEC interfaces. The first interface is a POGOPIN interface, and the second interface is a TYPEC interface. In practical use, this device can be directly and modularly installed on a compatible smart device via the POGOPIN interface, or it can be connected to the interface of a smart device or other devices with USB interfaces via a USB cable using the TYPEC interface.

[0032] This design offers significant advantages. Compared to traditional USB camera modules, it overcomes the limitations of built-in integration, reducing cable pulling and bending, and improving the reliability of the USB camera module. Simultaneously, it combines placement flexibility with operational reliability, increasing the placement flexibility and angle adjustment range of the USB camera module, allowing users to have a wider shooting space and more shooting angles, and facilitating rapid deployment, upgrades, expansions, and repairs / replacements.

[0033] Specifically, the USB_DP_P and USB_DM_P signals on the first interface J1 are the USB signals used for communication between the smart device and the USB camera module via the POGOPIN interface. The 5V voltage VCC is the power supply flowing from the smart device to the USB camera module. This power is first filtered by the fifth capacitor C5 and the sixth capacitor C6, and then passes through the unidirectional diode D3 to provide the 5V voltage VCC to the internal circuitry of the USB camera module. GND is the signal reference level. Furthermore, the third TVS protection diode D3 and the fourth TVS protection diode D4 provide electrostatic discharge protection for the USB signals.

[0034] The USB_DP_U and USB_DM_U signals on the second interface J2 are USB signals used by smart devices or other devices with USB interfaces to communicate with the USB camera module via the TYPEC interface. The 5V voltage VCC is the power supply flowing from the smart device or other device with a USB interface to the USB camera module. After being filtered by the seventh capacitor C7 and the eighth capacitor C8, it provides the 5V voltage VCC internally to the USB camera module. GND is the signal reference level. The fifth TVS protection diode D5 and the sixth TVS protection diode D6 provide electrostatic discharge protection for the USB signals. The eighth resistor R8 and the ninth resistor R9 are used to identify the device as a powered device when connected to an external USB port.

[0035] The USB_DP_C and USB_DM_C ports on the camera interface are USB signals used for communication between the USB camera module and the switching chip. The 5V voltage VCC flows to the USB camera module after being filtered by the third capacitor C3 and the fourth capacitor C4. GND is the signal reference level. The first TVS protection diode D1 and the second TVS protection diode D2 provide electrostatic discharge protection for the USB signal.

[0036] U1 is a switching chip. The 3.3V VCC voltage is filtered by capacitors C1 and C2 to provide power input to the chip. GND is the signal reference level. Pins 3 and 4 of the switching chip are signal output channels, connected to the USB_DP_C and USB_DM_C interfaces of the camera interface. Pins 7 and 6 are signal input channels HSD1, connected to the USB_DP_U and USB_DM_U interfaces of the TYPEC interface via resistors R3 and R4, respectively. Pins 9 and 8 are signal input channels HSD2, connected to the USB_DP_P and USB_DM_P interfaces of the POGOPIN interface via resistors R1 and R2, respectively. Resistors R1, R2, R3, and R4 buffer and protect the TYPEC and POGOPIN interfaces. Pin 10 is the output enable pin, pulled down to ground by resistor R5 to enable the signal output channel. Pin 2 is the input strobe pin.

[0037] When connected to a smart device only via the POGOPIN interface, the USB camera module is powered by the smart device, and the 5V voltage VCC is high. The second pin of the switch chip is pulled up to VCC5V_P through the sixth resistor R6 and the seventh resistor R7, making the second pin of the switch chip high (S=1). At this time, the HSD2 input channel is opened, and the USB_DP_P and USB_DM_P of the switch chip are connected to the USB_DP_C and USB_DM_C of the camera interface, allowing the USB camera module to be recognized by the smart device.

[0038] When the USB camera module is connected to a smart device or other device with a USB interface via a USB cable connected only through the Type-C interface, power is supplied through the Type-C interface, and the 5V voltage VCC is high. Due to the presence of the third TVS protection diode D3, the 5V voltage VCC cannot flow back to VCC5V_P, and VCC5V_P is low. The second pin of the switching chip is pulled down to ground through the seventh resistor R7, and the second pin of the switching chip is low, i.e., S=0, opening the HSD1 input channel. At this time, the USB_DP_U and USB_DM_U of the smart device or other device with a USB interface are connected to the USB_DP_C and USB_DM_C of the camera interface, and the USB camera module is recognized by the smart device or other device with a USB interface.

[0039] When connecting to different devices simultaneously via two interfaces, if the USB camera module is installed on a smart device via the POGOPIN interface and connected to another device with a USB interface via the TYPEC interface, even though the USB camera module is connected to two devices at the same time, because VCC5V_P is at a high level, the second pin of the switching chip is also at a high level. At this time, the USB_DP_P and USB_DM_P of the switching chip are connected to the USB_DP_C and USB_DM_C of the camera interface, and the USB camera module will only be recognized by the smart device.

[0040] It should be noted that the type of switch chip used in this application is not limited to SGM7227; and the type of USB camera module is not limited to GC2053.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A multi-camera signal switching device applied to a smart device, the smart device being provided with a main control board, characterized in that, The multi-camera signal switching device comprises a first interface circuit, a second interface circuit for connecting with other devices having USB interface, a camera control signal interface circuit and a USB switch switching circuit; the interface of the main control board is electrically connected with the first interface circuit, the USB switch switching circuit is electrically connected with the first interface circuit, the second interface circuit and the camera control signal interface circuit, and the camera control signal interface circuit is electrically connected with a USB camera module.

2. The multi-camera signal switching apparatus of claim 1, wherein, The USB switch switching circuit comprises a switch chip, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor; the third pin and the fourth pin of the switch chip are electrically connected with the camera control signal interface circuit, one end of the first resistor is electrically connected with the ninth pin of the switch chip, and the other end is electrically connected with the first interface circuit; one end of the second resistor is electrically connected with the eighth pin of the switch chip, and the other end is electrically connected with the first interface circuit; one end of the third resistor is electrically connected with the seventh pin of the switch chip, and the other end is electrically connected with the second interface circuit; one end of the fourth resistor is electrically connected with the sixth pin of the switch chip, and the other end is electrically connected with the second interface circuit; the first pin of the switch chip is electrically connected with a 3.3V voltage, the fifth pin of the switch chip is grounded, the first capacitor and the second capacitor are connected in parallel, one end is electrically connected with the first pin of the switch chip, and the other end is electrically connected with the fifth pin of the switch chip; the sixth resistor and the seventh resistor are connected in series, one end is connected with a 5V voltage, and the other end is grounded; the second pin of the switch chip is electrically connected to the common end of the sixth resistor and the seventh resistor, and the tenth pin of the switch chip is grounded.

3. The multi-camera signal switching device of claim 2, wherein, The camera control signal interface circuit comprises a camera interface, a third capacitor, a fourth capacitor, a first TVS protection diode and a second TVS protection diode; the first pin of the camera interface is connected with a 5V voltage, the fourth pin of the camera interface is grounded, the second pin of the camera interface is electrically connected with the fourth pin of the switch chip; the third pin of the camera interface is electrically connected with the third pin of the switch chip, one end of the third capacitor is grounded, and the other end is electrically connected with the first pin of the switch chip; one end of the fourth capacitor is grounded, and the other end is electrically connected with the first pin of the switch chip, one end of the first TVS protection diode is grounded, and the other end is electrically connected with the fourth pin of the switch chip, one end of the second TVS protection diode is grounded, and the other end is electrically connected with the third pin of the switch chip.

4. The multi-camera signal switching apparatus of claim 3, wherein, The first interface circuit comprises a first interface, a diode, a third TVS protection diode, a fourth TVS protection diode, a fifth capacitor and a sixth capacitor; the first pin of the first interface is connected with a 5V voltage, one end of the diode is connected with a 5V voltage, and the other end is electrically connected with the first pin of the first interface; the second pin of the first interface is electrically connected with the eighth pin of the switch chip, and the third pin of the first interface is electrically connected with the ninth pin of the switch chip; one end of the third TVS protection diode is grounded, and the other end is electrically connected with the second pin of the first interface; one end of the fourth TVS protection diode is grounded, and the other end is electrically connected with the third pin of the first interface; one end of the fifth capacitor is grounded, and the other end is electrically connected with the first pin of the first interface; one end of the sixth capacitor is grounded, and the other end is electrically connected with the first pin of the first interface.

5. The multi-camera signal switching apparatus of claim 4, wherein, The second interface circuit comprises a second interface, a fifth TVS protection diode, a sixth TVS protection diode, a seventh capacitor, an eighth capacitor, an eighth resistor and a ninth resistor; one end of the fifth TVS protection diode is grounded, and the other end is electrically connected with the seventh B pin of the second interface; one end of the sixth TVS protection diode is grounded, and the other end is electrically connected with the sixth B pin of the second interface; the sixth A pin of the second interface is electrically connected with the seventh pin of the switch chip, and the seventh A pin of the second interface is electrically connected with the sixth pin of the switch chip; one end of the eighth resistor is grounded, and the other end is electrically connected with the fifth A pin of the second interface; the fourth A pin of the second interface is connected with a 5V voltage; one end of the seventh capacitor is grounded, and the other end is electrically connected with the fourth A pin of the second interface; the ninth A pin of the second interface is electrically connected with the fourth A pin of the second interface; one end of the ninth resistor is grounded, and the other end is electrically connected with the fifth B pin of the second interface; the fourth B pin of the second interface is connected with a 5V voltage; one end of the eighth capacitor is grounded, and the other end is electrically connected with the fourth B pin of the second interface; the ninth B pin of the second interface is electrically connected with the fourth B pin of the second interface; the first B pin of the second interface is grounded, and the first B pin of the second interface is electrically connected with the twelfth B pin of the second interface; the first A pin of the second interface is grounded, and the twelfth A pin, the first pin, the second pin, the third pin and the fourth pin of the second interface are electrically connected with the first A pin of the second interface.

6. A multi-camera signal switching device as claimed in claim 5, characterized in that, The model of the switch chip is SGM7227.

7. The multi-camera signal switching apparatus of claim 1, wherein, The model of the USB camera module is GC2053.

Images