Anti-eavesdropping device

Abstract

The utility model relates to the technical field of audio equipment, in particular to an anti-eavesdropping device, which comprises a circuit board, a first connector, a second connector, an audio control circuit and a quick charge control circuit, the circuit board comprises a first end part, a central part and a second end part which are sequentially arranged along the length direction of the circuit board, and the first connector and the second connector are arranged on the central part and are oppositely arranged along the width direction of the circuit board; the audio control circuit is arranged on the first end part and is electrically connected with the first connector; the quick charge control circuit is arranged on the second end part and is electrically connected with the first connector and the second connector respectively; by designing the anti-eavesdropping device, the terminal is effectively prevented from eavesdropping a user, and the fast charging control circuit and the audio control circuit are respectively arranged at the two ends of the first connector and the second connector, so that the width of the device is reduced, the device is more convenient to use after being connected with the terminal, local overheating can be prevented, and the service life of the terminal is prolonged. Therefore, heat dissipation is faster and more uniform, and the system is more stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to audio equipment technical field, especially a kind of anti-interception device. BACKGROUND

[0002] Based on the user privacy interception event of internet external terminal occurs from time to time;For example, the microphone of the external terminal is started in the case that the intercepted party is unaware by the software installed in the external terminal of the intercepted party, so that the intercepted party is intercepted;A kind of anti-interception device needs to be designed to avoid the above-mentioned phenomenon;And anti-interception device as a terminal accessory, to reduce the carrying pressure, miniaturization becomes future trend, the overall volume of anti-interception device mainly depends on the layout of its circuit board, and the design of conventional design is prone to cause to occupy larger layout space;Therefore, design a kind of anti-interception device with simple circuit, reliable and reasonable layout becomes the problem that the technical personnel in the field urgently need to solve. SUMMARY

[0003] The technical problem to be solved by the embodiments of the utility model lies in providing an anti-interception device with simple circuit, reliability and reasonable layout to solve the problems of complex circuit design and large layout space in the prior art.

[0004] The utility model discloses an anti-interception device, and the scheme lies in, including: circuit board, first connector, second connector, audio control circuit and fast charging control circuit, the circuit board includes the first end portion, center portion and second end portion that are sequentially arranged along its length direction, first connector and second connector are all set up on the center portion, and are set up along the width direction of circuit board opposite, audio control circuit is set up on the first end portion, and is electrically connected with first connector, and fast charging control circuit is set up on the second end portion, and is electrically connected with first connector and second connector respectively.

[0005] Optionally, the circuit board is a double-sided board, and the audio control circuit and the fast charging control circuit are arranged on a first surface and a second surface of the circuit board respectively.

[0006] Optionally, the anti-interception device further comprises a housing, the housing is internally provided with a receiving cavity, the housing is provided with a first avoiding slot and a second avoiding slot, the circuit board is arranged in the receiving cavity, and the first connector and the second connector are exposed outside the housing through the first avoiding slot and the second avoiding slot respectively.

[0007] Optionally, the anti-interception device further comprises an indicator light circuit, and the indicator light circuit is arranged on the back surface of one of the audio control circuit and the fast charging control circuit.

[0008] Optionally, a key circuit is further included, and the key circuit is arranged on the back of the other one of the audio control circuit and the fast charging control circuit.

[0009] Optionally, the audio control circuit includes an audio chip, and the audio chip and the first connector are both provided with signal transmission pins, and the signal transmission pins of the audio chip are connected with the signal transmission pins of the first connector.

[0010] Optionally, the fast charging control circuit includes a fast charging chip, and the fast charging chip and the first connector are both provided with CC pins, and the CC pins of the fast charging chip are connected with the CC pins of the first connector for protocol communication, and the CC pins of the first connector are further used for connecting an external terminal for insertion detection.

[0011] Optionally, the second connector is provided with a CC pin, and the CC pin of the second connector is connected with the CC pin of the fast charging chip for protocol communication.

[0012] Optionally, the fast charging chip is further provided with a power output pin, and the power output pin is connected with the audio control circuit for providing voltage for the audio control circuit.

[0013] Optionally, the first connector is a Micro-USB connector, a Type-C connector or a Lighting connector, and the second connector is a Micro-USB connector, a Type-C connector or a Lighting connector.

[0014] Compared with the prior art, the anti-eavesdropping device has the advantages that: by designing an anti-eavesdropping device, the terminal can effectively prevent eavesdropping on the user; and by arranging the fast charging control circuit and the audio control circuit at two ends of the first connector and the second connector respectively, the width of the anti-eavesdropping device is minimized, so that when the first connector is connected to the terminal, the distance between the second connector and the terminal is reduced, and the user can use it more conveniently, further, by arranging the first connector between the fast charging control circuit and the audio control circuit, the signal transmission distance can be as balanced as possible, which helps to reduce the delay difference in the signal transmission process, reduce the crosstalk between signals, and improve the quality and stability of signal transmission; further, it can effectively prevent local overheating, so that the heat dissipation is faster and more uniform, thereby making the system more stable. BRIEF DESCRIPTION OF DRAWINGS

[0015] The technical solutions of the utility model will be further described in detail below with reference to the drawings and embodiments, and the drawings show:

[0016] Figure 1The utility model embodiment provides a structure diagram of anti-interception device. Figure 1 ;

[0017] Figure 2 The utility model embodiment provides a structure diagram of anti-interception device. Figure 2 ;

[0018] Figure 3 The utility model embodiment provides a perspective view of anti-interception device.

[0019] Figure 4 The utility model embodiment provides a structure diagram of circuit board.

[0020] Figure 5 The utility model embodiment provides a structure diagram of anti-interception device. Figure 3 ;

[0021] Figure 6 The utility model embodiment provides a circuit diagram of anti-interception device.

[0022] The reference signs in the drawings are as follows:

[0023] 100, circuit board; 200, first connector; 300, second connector; 400, audio control circuit; 500, fast charging control circuit; 600, shell; 700, indicator light circuit; 800, key circuit; 110, first end; 120, center part; 130, second end; 610, accommodating cavity; 620, first avoiding slot; 630, second avoiding slot; U1, audio chip; U2, fast charging chip. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the utility model will be described in detail with reference to the drawings.

[0025] As shown in Figures 1 to 6 , the utility model provides a specific embodiment of anti-interception device.

[0026] An anti-interception device, referring to Figures 1 to 3The anti-eavesdropping device comprises a circuit board 100, a first connector 200, a second connector 300, an audio control circuit 400 and a fast charging control circuit 500; the first connector 200, the second connector 300, the audio control circuit 400 and the fast charging control circuit 500 are all arranged on the circuit board 100, the first connector 200 is used for connecting an external terminal, the second connector 300 is used for connecting an external adapter, an output end of the audio control circuit 400 is connected with an input side of the first connector 200, so as to acquire the audio control right of the external terminal through the first connector 200 and transmit the audio data to the external terminal, a power input end of the fast charging control circuit 500 is connected with the second connector 300, so as to acquire external power, and a power output end of the fast charging control circuit 500 is connected with the first connector 200, so as to fast charge the external terminal.

[0027] With reference to Figure 3 and Figure 4 The circuit board 100 comprises a first end portion 110, a center portion 120 and a second end portion 130 arranged in sequence along the length direction of the circuit board 100, i.e. the first end portion 110 and the second end portion 130 are at both ends of the length direction of the circuit board 100, and the center portion 120 is between the first end portion 110 and the second end portion 130, wherein the audio control circuit 400 is arranged on the first end portion 110, the fast charging control circuit 500 is arranged on the second end portion 130, and the first connector 200 and the second connector 300 are both arranged on the center portion 120 and arranged opposite to each other along the width direction of the circuit board 100.

[0028] By arranging the first connector 200 and the second connector 300 on the center portion 120 and arranging the fast charging control circuit 500 and the audio control circuit 400 on both ends of the first connector 200 and the second connector 300 respectively, on the one hand, the distance between the first connector 200 and the second connector 300 can be reduced, so as to reduce the width of the anti-eavesdropping device as much as possible, so that when the first connector 200 is connected to the terminal, the distance between the second connector 300 and the terminal is reduced, and the user can use it more conveniently, on the other hand, by arranging the first connector 200 between the fast charging control circuit 500 and the audio control circuit 400, the signal transmission distance can be as balanced as possible, which helps to reduce the delay difference in the signal transmission process and also can reduce the crosstalk between signals, so as to improve the quality and stability of signal transmission; on the other hand, by arranging the fast charging control circuit 500 and the audio control circuit 400 on both ends of the circuit board 100 respectively, local overheating can be effectively prevented, so that the heat dissipation is faster and more uniform, so that the system is more stable.

[0029] It should be noted that the positions of the audio control circuit 400 and the fast charging control circuit 500 can be interchanged, and the audio control circuit 400 and the fast charging control circuit 500 can be arranged on the same face of the circuit board 100 and at two ends of the circuit board 100, respectively. The audio control circuit 400 and the fast charging control circuit 500 can also be arranged on the first face and the second face of the circuit board 100 and at two ends of the circuit board 100, respectively.

[0030] In one of the embodiments, referring to Figure 3 , the circuit board 100 is a double-sided board, and the audio control circuit 400 and the fast charging control circuit 500 are arranged on the first face and the second face of the circuit board 100, respectively. This design can simplify the wiring of the circuit board and has higher maintainability and readability. Moreover, by arranging the audio control circuit 400 and the fast charging control circuit 500 on the first face and the second face of the circuit board 100, respectively, better signal isolation can be achieved, the interference between signals can be reduced, and the stability and reliability of the overall circuit can be improved. Furthermore, the two-face layout can also help better manage heat. The audio control circuit 400 and the fast charging control circuit 500 will generate a lot of heat when running, and separate layout can help even heat dissipation to avoid local overheating.

[0031] In one of the embodiments, referring to Figure 5 , the anti-eavesdropping device further includes a housing 600, the housing 600 is provided with a containing cavity 610, the housing 600 is provided with a first avoiding slot 620 and a second avoiding slot 630, and the circuit board 100 is arranged in the containing cavity 610. The first connector 200 and the second connector 300 are exposed outside the housing 600 through the first avoiding slot 620 and the second avoiding slot 630, respectively.

[0032] Specifically, referring to Figure 5 , the first avoiding slot 620 and the second avoiding slot 630 are both communicated with the containing cavity 610. When the circuit board 100 is placed in the containing cavity 610, the first connector 200 on the circuit board 100 can extend to the outside of the housing 600 through one of the first avoiding slot 620 and the second avoiding slot 630 for connecting an external terminal, and the second connector 300 on the circuit board 100 can extend to the outside of the housing 600 through the other of the first avoiding slot 620 and the second avoiding slot 630 for connecting an external adapter.

[0033] It should be noted that, in order to improve the stability between the housing 600 and the circuit board 100, a glue layer can be arranged between the housing 600 and the circuit board 100. On the one hand, the circuit board 100 can be fixed in the housing 600, and on the other hand, the glue layer can be effectively isolated to effectively electrically isolate each circuit and each connector, thereby improving the use safety.

[0034] In one embodiment, referring to Figure 1 The anti-eavesdropping device further comprises an indicator circuit 700, which is arranged on the back of one of the audio control circuit 400 and the fast charging control circuit 500.

[0035] Specifically, the indicator circuit 700 can be arranged on the first end portion 110 and on the back of the audio control circuit 400, and can also be arranged on the second end portion 130 and on the back of the fast charging control circuit 500, so as to reduce the space occupied by the anti-eavesdropping device in the length direction, thereby reducing the wiring length of the anti-eavesdropping device and achieving miniaturized design.

[0036] In one embodiment, referring to Figure 1 The anti-eavesdropping device further comprises a key circuit 800, which is arranged on the back of the other one of the audio control circuit 400 and the fast charging control circuit 500.

[0037] Specifically, the key circuit 800 can be arranged on the first end portion 110 and on the back of the audio control circuit 400, and can also be arranged on the second end portion 130 and on the back of the fast charging control circuit 500; so as to reduce the space occupied by the anti-eavesdropping device in the length direction, thereby reducing the wiring length of the anti-eavesdropping device and achieving miniaturized design.

[0038] It should be noted that the shell 600 is provided with a relief hole corresponding to the positions of the key circuit 800 and the indicator circuit 700, so that the keys on the key circuit 800 and the indicator lights on the indicator circuit 700 can extend out of the shell 600, thereby facilitating the user to input instructions through the keys and facilitating the user to check the current working state of the device.

[0039] In one embodiment, referring to Figure 6 The audio control circuit 400 comprises an audio chip U1, and the audio chip U1 and the first connector 200 are both provided with signal transmission pins (DM pin and DP pin), and the signal transmission pins (DM pin and DP pin) of the audio chip U1 are connected with the signal transmission pins (DM pin and DP pin) of the first connector 200.

[0040] Specifically, referring to Figure 6The external terminal refers to a terminal device with a built-in microphone, such as a mobile phone. The first connector 200 supports audio transmission protocols such as the USB Audio Class protocol. The USB Audio Class defines a set of standard audio data formats and communication protocols, enabling the audio control circuit 400 to communicate with computers, mobile phones, or other host devices without the need for specific drivers. When the audio control circuit 400 is connected to the external terminal through the first connector 200, the first connector 200 can transmit the trigger signal received by the audio control circuit 400 to the terminal. The terminal will recognize the audio control circuit 400 as a microphone device by default, thereby enabling the audio control circuit 400 to obtain the audio control permissions transmitted back by the external terminal based on the trigger signal.

[0041] The audio control circuit 400 has multiple built-in audio segments. The signal transmission pins (DM pin and DP pin) of the audio chip U1 are connected to the signal transmission pins (DM pin and DP pin) of the first connector 200. When the audio control circuit 400 obtains audio control permission from the external terminal, the audio in the audio control circuit 400 can be transmitted to the external terminal through the first connector 200. The audio built into the audio control circuit 400 can be white noise. White noise can be generated by using a pseudo-random number generator to generate a random digital sequence and output it directly as a waveform, or mapped to a specific voltage or audio value. White noise can also be generated in analog circuits through phenomena such as thermal noise of transistors and diodes.

[0042] By obtaining audio control permissions from the external terminal through the audio control circuit 400, the input of audio signals to the terminal device can be controlled. Moreover, the audio control module only has preset audio and cannot obtain audio from the surrounding environment, so the external terminal device cannot record the user's voice. This effectively prevents the terminal device from maliciously eavesdropping on and collecting the user's voice and conversation content, effectively protecting the user's privacy and thus improving the security of the terminal device.

[0043] In one embodiment, reference Figure 6 The fast charging control circuit 500 includes a fast charging chip U2. Both the fast charging chip U2 and the first connector 200 are provided with CC pins. The CC pin of the fast charging chip U2 is connected to the CC pin of the first connector 200 for protocol communication. The CC pin of the first connector 200 is also used to connect to an external terminal for insertion detection.

[0044] Specifically, the first connector 200 is a Micro-USB connector, a Type-C connector or a Lighting connector, the Micro-USB connector is used for connecting mobile devices and some electronic devices similar to tablets, digital cameras and the like to transmit data and charge, the Micro-USB connector has the characteristics of small size and convenience and durability; the Type-C connector is used for connecting various electronic devices, such as smartphones, laptops, tablets and the like, for transmitting data and charging, the Type-C connector supports higher data transmission speed and greater power transmission capacity, and the Type-C connector adopts a reversible design, the plug can be inserted regardless of the front and back, making the operation more convenient; the Lighting connector is used for connecting devices with iOS system to transmit data and charge the devices with iOS system.

[0045] The CC pin of the first connector 200 can be used to connect with the CC pin of the fast charging chip U2 to perform fast charging protocol handshake, and the CC pin of the first connector 200 can also be connected with the CC pin of the external terminal when the external terminal is accessed to realize insertion detection and fast charging protocol charging.

[0046] In one of the embodiments, the second connector 300 is a Micro-USB connector, a Type-C connector or a Lighting connector, and the second connector 300 is also provided with a CC pin, and the CC pin of the second connector 300 is connected with the CC pin of the fast charging chip U2 for fast charging protocol communication.

[0047] In one of the embodiments, the fast charging chip U2 is also provided with a power output pin, and the power output pin is connected with the audio control circuit 400 to provide 5V voltage for the audio control circuit 400, wherein the audio control circuit 400 can obtain power from the external terminal through the first connector 200 and also can obtain 5V voltage through the fast charging control circuit 500 to realize power supply.

[0048] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them, and for those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some technical features can be replaced equivalently; all these modifications and replacements should belong to the protection scope of the claims of the present application.

Claims

1. An anti-eavesdropping device, characterized in that, include: The circuit board comprises a first connector, a second connector, an audio control circuit, and a fast charging control circuit. The circuit board includes a first end, a center portion, and a second end portion arranged sequentially along its length. The first connector and the second connector are both disposed on the center portion and are arranged opposite to each other along the width direction of the circuit board. The audio control circuit is disposed on the first end portion and is electrically connected to the first connector. The fast charging control circuit is disposed on the second end portion and is electrically connected to both the first connector and the second connector.

2. The anti-eavesdropping device according to claim 1, characterized in that, The circuit board is a double-sided board, with the audio control circuit and the fast charging control circuit respectively located on the first and second sides of the circuit board.

3. The anti-eavesdropping device according to claim 1, characterized in that, It also includes a housing, which has a receiving cavity, and a first clearance groove and a second clearance groove are provided on the housing. The circuit board is disposed in the receiving cavity, and the first connector and the second connector are exposed outside the housing through the first clearance groove and the second clearance groove, respectively.

4. The anti-eavesdropping device according to claim 1, characterized in that, It also includes an indicator light circuit, which is located on the back of either the audio control circuit or the fast charging control circuit.

5. The anti-eavesdropping device according to claim 4, characterized in that, It also includes a button circuit, which is located on the back of the other of the audio control circuit and the fast charging control circuit.

6. The anti-eavesdropping device according to claim 1, characterized in that, The audio control circuit includes an audio chip, and both the audio chip and the first connector are provided with signal transmission pins. The signal transmission pins of the audio chip are connected to the signal transmission pins of the first connector.

7. The anti-eavesdropping device according to claim 1, characterized in that, The fast charging control circuit includes a fast charging chip. Both the fast charging chip and the first connector are provided with a CC pin. The CC pin of the fast charging chip is connected to the CC pin of the first connector for protocol communication. The CC pin of the first connector is also used to connect to an external terminal for insertion detection.

8. The anti-eavesdropping device according to claim 7, characterized in that, The second connector is provided with a CC pin, which is connected to the CC pin of the fast charging chip for protocol communication.

9. The anti-eavesdropping device according to claim 6, characterized in that, The fast charging chip is also provided with a power output pin, which is connected to the audio control circuit to provide voltage to the audio control circuit.

10. The anti-eavesdropping device according to claim 1, characterized in that, The first connector is a Micro-USB connector, a Type-C connector, or a Lightning connector, and the second connector is a Micro-USB connector, a Type-C connector, or a Lightning connector.

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