Overcurrent protection circuit and aviation plug

Abstract

The embodiment of the utility model provides an overcurrent protection circuit and an aviation plug, and relates to the technical field of electronic circuits. The circuit comprises a first audio input pin, a second audio input pin, a control module and an overcurrent protection module, the first audio input pin is provided with a left channel audio contact and a first grounding contact, and the second audio input pin is provided with a right channel audio contact and a second grounding contact. The overcurrent protection module comprises a first fuse, a second fuse and a third fuse; the first fuse is electrically connected with the left channel audio contact and is used for carrying out overcurrent protection on current input by the left channel audio contact; the second fuse is electrically connected with the right sound channel audio contact and is used for carrying out overcurrent protection on the current input by the right sound channel audio contact; and the third fuse is electrically connected with the first grounding contact and the second grounding contact and is used for carrying out overcurrent protection on current input by the first grounding contact and the second grounding contact. According to the embodiment of the invention, the safety of the aviation plug can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuits, and particularly relates to an overcurrent protection circuit and an aviation plug. BACKGROUND

[0002] The aviation plug is an electronic connector for an airplane. On the airplane, the aviation plug can be inserted into an audio socket, and an earphone is connected by using the aviation plug, so that the earphone plug is not mismatched with the audio socket of the airplane. At present, the safety of the aviation plug is low, which affects the use experience of a user. For example, the pin spacing of the aviation plug is the same as the hole spacing of a power socket on the airplane, which causes the user to easily misinsert the aviation plug into the power socket. The input current (such as 220V alternating current) of the power socket far exceeds the normal working current of the aviation plug, which causes the aviation plug to overheat, be damaged, or even be burned out. In addition, the current overcurrent protection circuit is difficult to be applied to the aviation plug.

[0003] Therefore, how to improve the safety of the aviation plug has become a technical problem to be solved. CONTENT OF THE INVENTION

[0004] The main purpose of the embodiment of the present application is to provide an overcurrent protection circuit and an aviation plug, and to improve the safety of the aviation plug.

[0005] To achieve the above purpose, the first aspect of the embodiment of the present application provides an overcurrent protection circuit, which is applied to an aviation plug, and the circuit comprises: a first audio input pin, a second audio input pin, a control module, and an overcurrent protection module; wherein the first audio input pin has a first ground contact and a left channel audio contact, and the second audio input pin has a second ground contact and a right channel audio contact.

[0006] The overcurrent protection module comprises a first fuse, a second fuse, and a third fuse.

[0007] The first fuse is electrically connected to the left channel audio contact and the control module; the second fuse is electrically connected to the right channel audio contact and the control module; one end of the third fuse is electrically connected to the first ground contact, and the other end of the third fuse is electrically connected to the second ground contact and the control module.

[0008] The first fuse is used for overcurrent protection of the current input by the left channel audio contact; the second fuse is used for overcurrent protection of the current input by the right channel audio contact; and the third fuse is used for overcurrent protection of the current input by the first ground contact and the current input by the second ground contact.

[0009] In some embodiments, the over-current protection module further comprises a first bidirectional anti-static diode, a second bidirectional anti-static diode, a third bidirectional anti-static diode, a first resistor, and a second resistor;

[0010] One end of the first bidirectional anti-static diode is grounded, and the other end of the first bidirectional anti-static diode is electrically connected to one end of the first resistor;

[0011] One end of the second bidirectional anti-static diode is grounded, one end of the third bidirectional anti-static diode is grounded, the other end of the second bidirectional anti-static diode, and the other end of the third bidirectional anti-static diode are electrically connected to one end of the second resistor;

[0012] The other end of the first resistor and the other end of the second resistor are electrically connected to the control module.

[0013] In some embodiments, the circuit further comprises a headphone interface module for connecting a headphone;

[0014] The over-current protection module further comprises a fourth bidirectional anti-static diode, a fifth bidirectional anti-static diode, and a sixth bidirectional anti-static diode;

[0015] One end of the fourth bidirectional anti-static diode is grounded, and the other end of the fourth bidirectional anti-static diode is electrically connected to the first resistor and the headphone interface module;

[0016] One end of the fifth bidirectional anti-static diode is grounded, and the other end of the fifth bidirectional anti-static diode is electrically connected to the second resistor and the headphone interface module;

[0017] One end of the sixth bidirectional anti-static diode is grounded, and the other end of the sixth bidirectional anti-static diode is electrically connected to the headphone interface module.

[0018] In some embodiments, the first audio input pin further has a first right channel audio contact;

[0019] The second fuse is electrically connected to the first right channel audio contact and the control module;

[0020] The second audio input pin is used to movably connect the aviation plug.

[0021] In some embodiments, the first audio input pin has a diameter of 2 to 4 millimeters.

[0022] In some embodiments, the circuit further comprises:

[0023] A serial communication protection module comprising a serial communication interface and an overvoltage protection chip;

[0024] The serial communication interface is electrically connected to the overvoltage protection chip, and the overvoltage protection chip is electrically connected to the control module; the overvoltage protection chip is configured to perform overvoltage protection on a voltage input by the serial communication interface.

[0025] In some embodiments, the circuit further comprises:

[0026] a Bluetooth module, which is electrically connected to the control module, and is configured to be connected to an earphone in a Bluetooth communication mode.

[0027] In some embodiments, a surface of the first audio input pin has a first plating layer, a surface of the second audio input pin has a second plating layer, and the first plating layer and the second plating layer are made of gold.

[0028] To achieve the above object, a second aspect of the embodiments of the present application provides an aviation plug, which comprises the overcurrent protection circuit of the first aspect.

[0029] In some embodiments, the aviation plug further comprises a shell; the first audio input pin of the overcurrent protection circuit has a first right-channel audio contact; the second fuse is electrically connected to the first right-channel audio contact and the control module.

[0030] The second audio input pin of the overcurrent protection circuit is configured to be movably connected to the shell.

[0031] The overcurrent protection circuit and the aviation plug provided by the present application can solve the problem that the aviation plug is easily misinserted into a power socket. The first fuse is configured to perform overcurrent protection on a current input by a left-channel audio contact, the second fuse is configured to perform overcurrent protection on a current input by a right-channel audio contact, and the third fuse is configured to perform overcurrent protection on a current input by a first ground contact and a current input by a second ground contact. The present application performs overcurrent protection on each contact of the first audio input pin (such as the left-channel audio contact) and each contact of the second audio input pin (such as the right-channel audio contact), thereby avoiding overlarge current of a circuit in the aviation plug and improving the safety of the aviation plug. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a module block diagram of the overcurrent protection circuit provided by the embodiments of the present application;

[0033] Figure 2 is a module block diagram of the overcurrent protection circuit provided by another embodiment of the present application;

[0034] Figure 3 is a structural schematic diagram of an aviation plug provided by another embodiment of the present application;

[0035] Figure 4 is a circuit schematic diagram of the overcurrent protection circuit provided by an embodiment of the present application;

[0036] Figure 5 is a module block diagram of the serial communication protection module provided by an embodiment of the present application.

[0037] Reference signs: first audio input pin 10; second audio input pin 20; control module 30; overcurrent protection module 40; serial communication protection module 50; first ground contact 11; left channel audio contact 12; first right channel audio contact 13; second ground contact 21; right channel audio contact 22; first fuse 41; second fuse 42; third fuse 43; serial communication interface 51; overvoltage protection chip 52;

[0038] First bidirectional anti-static diode TVS1; second bidirectional anti-static diode TVS2; third bidirectional anti-static diode TVS3; fourth bidirectional anti-static diode TVS4; fifth bidirectional anti-static diode TVS5; sixth bidirectional anti-static diode TVS6; first resistor R01; second resistor R02; earphone interface module J1. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0040] It should be noted that although the functional modules are divided in the device schematic diagram, and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification and claims and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application, and are not intended to limit the present application.

[0042] First, the terms involved in the present application are analyzed:

[0043] Aviation plug: also known as aviation adapter, is an electronic connector used in the field of aviation. On the plane, the aviation plug can be inserted into the audio socket, and the aviation plug is connected to the earphone, so that the audio interface of the plane is compatible with the interface of the ordinary earphone.

[0044] The overcurrent protection circuit and the aviation plug provided by the embodiments of the present application are specifically described through the following embodiments. First, the overcurrent protection circuit in the embodiments of the present application is described.

[0045] It should be noted that in each specific embodiment of the present application, when relevant processing needs to be performed according to user information, user behavior data, user historical data, and user location information, and other data related to the identity or characteristics of the user, the user's permission or consent is obtained first, and the collection, use, and processing of the data comply with relevant laws, regulations, and standards. In addition, when the embodiments of the present application need to obtain sensitive personal information of the user, the separate permission or separate consent of the user is obtained through a pop-up window or a jump to a confirmation page, and after the separate permission or separate consent of the user is obtained, the necessary user-related data for enabling the embodiments of the present application to normally operate is obtained.

[0046] Figure 1 is an optional module block diagram of the overcurrent protection circuit provided by the embodiments of the present application, Figure 1 The overcurrent protection circuit in the aviation plug includes a first audio input pin 10, a second audio input pin 20, a control module 30, and an overcurrent protection module 40. The first audio input pin 10 has a first ground contact 11 and a left channel audio contact 12, and the second audio input pin 20 has a second ground contact 21 and a right channel audio contact 22.

[0047] The overcurrent protection module 40 includes a first fuse 41, a second fuse 42, and a third fuse 43.

[0048] The first fuse 41 is electrically connected to the left channel audio contact 12 and the control module 30. The second fuse 42 is electrically connected to the right channel audio contact 22 and the control module 30. One end of the third fuse 43 is electrically connected to the first ground contact 11, and the other end of the third fuse 43 is electrically connected to the second ground contact 21 and the control module 30.

[0049] The first fuse 41 is used for overcurrent protection of the current input by the left channel audio contact 12. The second fuse 42 is used for overcurrent protection of the current input by the right channel audio contact 22. The third fuse 43 is used for overcurrent protection of the current input by the first ground contact 11 and the current input by the second ground contact 21.

[0050] It should be noted that the pin spacing of the aviation plug can be the same as the socket spacing of the power socket. For example, the spacing of the two pins (the first audio input pin 10 and the second audio input pin 20) of the aviation plug can be 12.7 mm (millimeters), and the socket spacing of the power socket on the airplane is usually 12.7 ± 0.14 mm. In this case, the pin spacing of the aviation plug is the same as the socket spacing of the power socket, which leads to the aviation plug being easily misinserted into the power socket. The input current of the power socket is usually 220V AC, which is much higher than the normal working current of the aviation plug, and can cause the aviation plug to overheat and burn out.

[0051] The beneficial effects of the embodiments of the present application include but are not limited to: for the problem that the aviation plug is easily misinserted into the power socket, the first fuse 41 performs overcurrent protection on the current input by the left channel audio contact 12, the second fuse 42 performs overcurrent protection on the current input by the right channel audio contact 22, and the third fuse 43 performs overcurrent protection on the current input by the first ground contact 11 and the current input by the second ground contact 21. The present application performs overcurrent protection on each contact (such as the left channel audio contact 12) of the first audio input pin 10 and each contact (such as the right channel audio contact 22) of the second audio input pin 20, thereby avoiding excessive current of the circuit in the aviation plug, and improving the safety of the aviation plug.

[0052] It should be noted that the left channel audio contact 12 is used to obtain a left channel audio signal, and the right channel audio contact 22 is used to obtain a right channel audio signal. The control module 30 is used to perform audio processing on the left channel audio signal and the right channel audio signal.

[0053] In an embodiment, the control module 30 is used to perform audio synthesis processing on the left channel audio signal and the right channel audio signal, and output a single-channel audio, so as to send the single-channel audio to the earphone in communication connection with the aviation plug. The embodiment of the present application can combine the independent left channel audio signal and the right channel audio signal on the airplane into a single-channel audio signal with integrated left and right channels, thereby adapting to a general earphone. In another embodiment, for example, in the case that the earphone can play a double-channel audio signal, the control module 30 can also directly send the left channel audio signal and the right channel audio signal to the earphone, which is not limited herein.

[0054] The earphone described above can include a wired earphone and a wireless earphone, and specifically can include: a Bluetooth earphone, a bone conduction earphone, a bone conduction Bluetooth earphone, an ear clip earphone, a hanging ear earphone, a hanging ear non-ear earphone, a hanging ear Bluetooth earphone, an open Bluetooth earphone, a sports earphone, a running earphone, a wireless sports earphone, an AI (artificial intelligence) earphone, an open AI earphone, a noise reduction earphone, an ANC (active noise reduction) earphone, an ENC (environmental noise reduction) earphone, a CVC (conversation noise reduction) earphone, a feedback noise reduction earphone, an adaptive noise reduction earphone, an AI (artificial intelligence) noise reduction earphone, an uplink noise reduction earphone, a downlink noise reduction earphone, an EQ (equalizer) earphone, an HI FI (high fidelity) earphone, a low distortion earphone, a spatial audio earphone, a voice control earphone, a stereo surround earphone, a Dolby earphone, a Dolby Bluetooth earphone, and a Dolby Atmos earphone. Other types of earphones can also be included, and the embodiments of the present application are not limited in this regard.

[0055] In some embodiments, the control module 30 can include a control chip, such as a PCBA (Printed Circuit Board Assembly). The control module 30 can also include other types of control chips, such as a CPU (Central Processing Unit), an MCU (Microcontroller Unit), and the like, without being limited thereto.

[0056] Please refer to Figure 2 In some embodiments, the first audio input pin 10 also has a first right channel audio contact 13.

[0057] The second fuse 42 is electrically connected between the first right channel audio contact 13 and the control module 30.

[0058] The second audio input pin 20 is used to movably connect the aviation plug.

[0059] The embodiment has the advantages that, considering that the input audio can include single-channel audio or double-channel audio, the embodiment sets the left-channel audio contact 12 and the first right-channel audio contact 13 on the first audio input pin 10, that is, the pin with the left-channel and right-channel audio contacts 22 is adopted. When the audio signal is double-channel audio composed of left-channel audio signal and right-channel audio signal (for example, in the audio socket of an airplane, one jack only outputs the left-channel audio signal and the other jack only outputs the right-channel audio signal), the left-channel audio signal can be acquired through the left-channel audio contact 12 of the first audio input pin 10, and the right-channel audio signal can be acquired through the right-channel audio contact 22 of the second input pin. When the audio signal is single-channel audio signal (for example, the audio output jack of a notebook computer can output single-channel audio signal), the audio signal can be directly acquired through the first audio input pin 10, thereby widening the application range of the aviation plug and improving the universality of the aviation plug.

[0060] Specifically, the second audio input pin 20 is used to movably connect the aviation plug, which can be that the second audio input pin 20 is telescopically connected with the shell. For example, the second audio input pin 20 has an extended state or a retracted state. In the case of being used to connect the audio socket with two jacks on the airplane, the second audio input pin 20 is in the extended state, and the first audio input pin 10 and the second audio input pin 20 can be inserted into the audio socket together. In the case of being used to connect the audio output jack (that is, a single jack) on the electronic device, the second audio input pin 20 is in the retracted state, and the first audio input pin 10 with the left-channel audio contact 12 and the first right-channel audio contact 13 can be inserted into the audio output jack alone to acquire the audio signal output by the audio output jack. In another embodiment, the second audio input pin 20 is plug-removably connected with the aviation plug or detachably connected with the aviation plug, which is not limited herein. The embodiment widens the application scenario of the aviation plug and improves the universality of the aviation plug.

[0061] It can be understood that the right-channel audio contact of the first audio input pin 10 is the first right-channel audio contact 13, and the right-channel audio contact 22 of the second audio input pin 20 is the second right-channel audio contact 22. That is, the right-channel audio contact 22 is equivalent to the second right-channel audio contact 22.

[0062] Please refer to Figure 2 and Figure 3In some embodiments, the aviation plug comprises a first audio input pin 10 and a second audio input pin 20, and the first audio input pin 10 has a first ground contact 11, a left channel audio contact 12, and a first right channel audio contact 13; the second audio input pin 20 has a second ground contact 21 and a second right channel audio contact 22. For example, on an airplane, the first audio input pin 10 and the second audio input pin 20 can be inserted into two jacks of an audio socket of the airplane, respectively.

[0063] Referring to Figure 2 and Figure 4 In some embodiments, the overcurrent protection module 40 further comprises a first bidirectional anti-static diode TVS1, a second bidirectional anti-static diode TVS2, a third bidirectional anti-static diode TVS3, a first resistor R01, and a second resistor R02.

[0064] One end of the first bidirectional anti-static diode TVS1 is grounded, and the other end of the first bidirectional anti-static diode TVS1 is electrically connected to one end of the first resistor R01.

[0065] One end of the second bidirectional anti-static diode TVS2 is grounded, one end of the third bidirectional anti-static diode TVS3 is grounded, the other end of the second bidirectional anti-static diode TVS2, and the other end of the third bidirectional anti-static diode TVS3 are electrically connected to one end of the second resistor R02.

[0066] The other end of the first resistor R01 and the other end of the second resistor R02 are electrically connected to the control module 30.

[0067] The advantage of this embodiment is that the overcurrent protection module 40 is composed of the first bidirectional anti-static diode TVS1, the second bidirectional anti-static diode TVS2, the third bidirectional anti-static diode TVS3, the first resistor R01, and the second resistor R02, wherein each bidirectional anti-static diode is used for static protection, further improving the safety and reliability of the aviation plug.

[0068] In some embodiments, the first fuse 41, the second fuse 42, and the third fuse 43 are fast-acting fuses. In the case that the above three fuses are in an overload state, that is, the current is higher than the rated current of the fuse, the fuse will be blown in a certain time. The rated current of each fuse can be different or the same, and the rated current can be set or adjusted according to the demand, for example, the normal working current of the aviation plug is set as the rated current of the above three fuses.

[0069] In some embodiments, if the aviation plug is inserted into the power outlet, the power prongs in the power outlet can contact any one of the contact points of the two plugs. The contact points of the first audio input pin 10 include: the first ground contact 11, the left channel audio contact 12, and the first right channel audio contact 13. The contact points of the second audio input pin 20 include: the second ground contact 21, and the second right channel audio contact 22. For example, in different contact situations, the overcurrent protection process can include:

[0070] (1) When the left channel audio contact 12 is in contact with a power prong, and the second right channel audio contact 22 is in contact with another power prong, the following circuit elements form a loop: the left channel audio contact 12, the first fuse 41, the control module 30, and the right channel audio contact 22. The current in the loop is much higher than the rated current of the first fuse 41, and the first fuse 41 is blown.

[0071] (2) When the first right channel audio contact 13 is in contact with a power prong, and the second right channel audio contact 22 is in contact with another power prong, the following circuit elements form a loop: the first right channel audio contact 13, the second fuse 42, and the second right channel audio contact 22. The current in the loop is much higher than the rated current of the second fuse 42, and the second fuse 42 is blown.

[0072] (3) When the first ground contact 11 is in contact with a power prong, and the second right channel audio contact 22 is in contact with another power prong, the following circuit elements form a loop: the first ground contact 11, the third fuse 43, the control module 30, and the second right channel audio contact 22. The current in the loop is much higher than the rated current of the third fuse 43, and the third fuse 43 is blown.

[0073] (4) When the left channel audio contact 12 is in contact with a power prong, and the second ground contact 21 is in contact with another power prong, the following circuit elements form a loop: the left channel audio contact 12, the first fuse 41, the control module 30, and the second ground contact 21. The current in the loop is much higher than the rated current of the first fuse 41, and the first fuse 41 is blown.

[0074] (5) When the first right channel audio contact 13 is in contact with a power prong, and the second ground contact 21 is in contact with another power prong, the following circuit elements form a loop: the first right channel audio contact 13, the second fuse 42, the control module 30, and the second ground contact 21. The current in the loop is much higher than the rated current of the second fuse 42, and the second fuse 42 is blown.

[0075] (6) When the first grounding contact 11 is in contact with one power plug and the second grounding contact 21 is in contact with another power plug, the following circuit elements form a loop: the first grounding contact 11, the third fuse 43, and the second grounding contact 21. The current in the loop is much higher than the rated current of the third fuse 43, and the third fuse 43 is fused.

[0076] Please refer to Figure 2 and Figure 4 In some embodiments, the overcurrent protection circuit further comprises: a headphone interface module J1, the headphone interface module J1 being configured to connect a headphone;

[0077] The overcurrent protection module 40 further comprises a fourth bidirectional transient voltage suppressor TVS4, a fifth bidirectional transient voltage suppressor TVS5, and a sixth bidirectional transient voltage suppressor TVS6.

[0078] One end of the fourth bidirectional transient voltage suppressor TVS4 is grounded, and the other end of the fourth bidirectional transient voltage suppressor TVS4 is electrically connected to the first resistor R01 and the headphone interface module J1.

[0079] One end of the fifth bidirectional transient voltage suppressor TVS5 is grounded, and the other end of the fifth bidirectional transient voltage suppressor TVS5 is electrically connected to the second resistor R02 and the headphone interface module J1.

[0080] One end of the sixth bidirectional transient voltage suppressor TVS6 is grounded, and the other end of the sixth bidirectional transient voltage suppressor TVS6 is electrically connected to the headphone interface module J1.

[0081] The advantage of this embodiment is that a wired headphone is connected through the headphone interface module J1, and the fourth bidirectional transient voltage suppressor TVS4, the fifth bidirectional transient voltage suppressor TVS5, and the sixth bidirectional transient voltage suppressor TVS6 jointly provide overcurrent protection for the current output to the headphone interface module J1, further improving the safety and reliability of the aviation plug.

[0082] In some embodiments, the diameter of the first audio input pin 10 is 2 to 4 millimeters.

[0083] The advantage of this embodiment is that by setting the size of the first audio input pin 10, such as setting the diameter of the first audio input pin 10 to be 2 to 4 millimeters, it can be ensured that the aviation plug is adapted to common audio output ports.

[0084] It should be noted that the size of a common audio output port (such as an audio jack) is 3.5 mm, corresponding to a 3.5 mm audio cable. The first audio input pin 10 of the present embodiment conforms to the size of a common audio output port, and can smoothly perform audio transmission.

[0085] In some embodiments, the diameter of the first audio input pin 10 is the same as the diameter of the second audio input pin 20. For example, the diameter of the first audio input pin 10 and the second audio input pin 20 is 3.5 millimeters (mm), which is suitable for a common earphone jack. In this case, the first audio input pin 10 (or the second audio input pin 20) can be connected to an audio output terminal of an electronic device, such as a server, a mobile terminal (a notebook computer, a mobile phone), to obtain the audio of various electronic devices, thereby improving the universality of the aviation plug.

[0086] Referring to Figure 5 In some embodiments, the overcurrent protection circuit further comprises:

[0087] The serial communication protection module 50 comprises a serial communication interface 51 and an overvoltage protection chip 52.

[0088] The serial communication interface 51 is electrically connected to the overvoltage protection chip 52, and the overvoltage protection chip 52 is electrically connected to the control module 30. The overvoltage protection chip 52 is configured to perform overvoltage protection on the voltage input by the serial communication interface 51.

[0089] The embodiment has the advantages that the serial communication interface 51 can be used to communicate with other devices (such as a USB), and the overvoltage protection chip 52 can perform overvoltage protection on the voltage input by the serial communication interface 51, thereby improving the safety and universality of the aviation plug.

[0090] It should be noted that the serial communication interface 51 is configured to connect to a power supply to supply power to the control module 30, and the serial communication interface 51 is also configured to perform audio transmission. For example, the serial communication interface 51 is a USB interface, the USB interface is connected to an external device (such as a mobile phone, a computer, etc.), the USB interface can obtain the audio signal of the external device, the audio signal is transmitted to the control module 30 through the USB interface, the audio signal of the external device is processed by the control module 30, and then the audio signal can be sent to the earphone in a wireless manner.

[0091] Specifically, the overvoltage protection chip 52 can be an overcurrent protection and overvoltage protection chip. The chip can simultaneously perform overcurrent protection (OCP) and overvoltage protection (OVP).

[0092] In some embodiments, the overcurrent protection circuit further comprises:

[0093] The Bluetooth module is electrically connected to the control module 30, and the Bluetooth module is configured to be in Bluetooth communication connection with the earphone.

[0094] The embodiment has the advantages that the Bluetooth module is in communication connection with the wireless earphone to transmit the audio signal, and the aviation plug can be safely and reliably connected with the wireless earphone, thereby improving the universality of the aviation plug.

[0095] In some embodiments, the Bluetooth module can also be an internal module of the control module 30, that is, the control module 30 can include the Bluetooth module. For example, the control module 30 includes a Bluetooth master control chip for Bluetooth wireless communication and for audio processing of the left-channel audio signal and the right-channel audio signal.

[0096] In some embodiments, the surface of the first audio input pin 10 has a first plating layer, the surface of the second audio input pin 20 has a second plating layer, and the materials of the first plating layer and the second plating layer are gold.

[0097] The embodiment has the advantages that, by the gold plating layer (that is, the first plating layer) on the surface of the first audio input pin 10 and the gold plating layer (that is, the second plating layer) on the surface of the second audio input pin 20, the good conductivity of gold can avoid the overcurrent problem caused by poor contact of the plug; in addition, the stability of the gold plating layer can make the first audio input pin 10 and the second audio input pin 20 maintain good conductivity for a long time, and the first audio input pin 10 and the second audio input pin 20 are not affected by changes in environmental factors (such as temperature and humidity), thereby further improving the safety and reliability of the aviation plug.

[0098] In some embodiments, the overcurrent protection circuit further includes a power module, the power module being electrically connected to the control module 30, and the power module being configured to supply power to the control module 30.

[0099] In some embodiments, the overcurrent protection circuit further includes a buffer module, the buffer module being electrically connected to the control module 30.

[0100] Specifically, the buffer module can include a FLASH (flash memory) chip.

[0101] The embodiment of the application also provides an aviation plug, which includes the overcurrent protection circuit.

[0102] In an embodiment, the aviation plug further includes a housing; the first audio input pin 10 of the overcurrent protection circuit has a first right-channel audio contact 13; the second fuse 42 is electrically connected to the first right-channel audio contact 13 and the control module 30.

[0103] The second audio input pin 20 of the overcurrent protection circuit is configured to be movably connected to the housing.

[0104] In an embodiment, the second audio input pin 20 is used to movably connect the shell, specifically, the second audio input pin 20 can be telescopically connected to the shell. In the case of connecting an audio socket having two jacks on an airplane, the second audio input pin 20 is in an extended state, and the first audio input pin 10 and the second audio input pin 20 can be inserted into the audio socket together. In the case of connecting an audio output jack (i.e., a single jack) on an electronic device, the second audio input pin 20 is in a retracted state, that is, the second audio input pin 20 is inside the shell of the aviation plug. The first audio input pin 10 having the left channel audio contact 12 and the first right channel audio contact 13 can be inserted into the audio output jack alone to obtain the audio signal output by the audio output jack. In another embodiment, the second audio input pin 20 can also be removably connected to the shell, detachably connected to the shell, which is not limited herein. The embodiments of the present application widen the application scenarios of the aviation plug and improve the universality of the aviation plug.

[0105] The specific embodiments of the aviation plug are basically the same as the specific embodiments of the overcurrent protection circuit described above, and will not be repeated here.

[0106] It should be noted that the non-company electronic elements or components appearing in the embodiments of the present application are only examples for introduction and do not represent actual use.

[0107] The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0108] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than shown in the figures, or combine certain steps, or different steps.

[0109] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separate, that is, can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0110] Those skilled in the art can understand that all or some of the functional modules / units in the systems and devices disclosed above can be implemented as software, firmware, hardware and their appropriate combinations.

[0111] The terms "first", "second", "third", "fourth", and the like in the description of this application and in the claims hereof, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed herein is solely for the purpose of distinctability and that the embodiments of the present application described herein can be carried out in other sequences than the one described herein without departing from the scope of the present application. Further, the terms "comprises", "comprising", "includes", "including", and the like, are inclusive only - that is, they mean and encompass the elements or processes listed thereafter, but do not exclude other elements or processes. They do not exclude other elements or processes.

[0112] It should be understood that, in the application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between associated objects, which means that there can be three relationships, for example, "A and / or B" can mean that there are three cases: only A, only B, and A and B at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0113] In several embodiments provided in the present application, it should be understood that the disclosed devices and circuits can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of the above units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. The coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0114] The units described above as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0115] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0116] When the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, essentially or in part, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes multiple instructions used to cause a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various other media that can store programs.

[0117] The preferred embodiments of the embodiments of the present application are described above with reference to the accompanying drawings, and are not intended to limit the scope of the embodiments of the present application. Any modifications, equivalent replacements and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall be within the scope of the embodiments of the present application.

Claims

1. An overcurrent protection circuit, characterized by comprising: The circuit is applied to an aviation plug, and the circuit comprises a first audio input pin, a second audio input pin, a control module and an overcurrent protection module; wherein the first audio input pin has a first ground contact and a left channel audio contact, and the second audio input pin has a second ground contact and a right channel audio contact; The overcurrent protection module comprises a first fuse, a second fuse and a third fuse; One end of the first fuse is electrically connected to the left channel audio contact and the control module; one end of the second fuse is electrically connected to the right channel audio contact and the control module; one end of the third fuse is electrically connected to the first ground contact, and the other end of the third fuse is electrically connected to the second ground contact and the control module; The first fuse is used for overcurrent protection of the current input by the left channel audio contact; the second fuse is used for overcurrent protection of the current input by the right channel audio contact; and the third fuse is used for overcurrent protection of the current input by the first ground contact and the current input by the second ground contact.

2. The overcurrent protection circuit of claim 1, wherein, The overcurrent protection module further comprises a first bidirectional anti-static diode, a second bidirectional anti-static diode, a third bidirectional anti-static diode, a first resistor and a second resistor; One end of the first bidirectional anti-static diode is grounded, and the other end of the first bidirectional anti-static diode is electrically connected to one end of the first resistor; One end of the second bidirectional anti-static diode is grounded, one end of the third bidirectional anti-static diode is grounded, and the other end of the second bidirectional anti-static diode and the other end of the third bidirectional anti-static diode are electrically connected to one end of the second resistor; The other end of the first resistor and the other end of the second resistor are electrically connected to the control module.

3. The overcurrent protection circuit of claim 2, wherein, The circuit further comprises an earphone interface module, and the earphone interface module is used for connecting an earphone; The overcurrent protection module further comprises a fourth bidirectional anti-static diode, a fifth bidirectional anti-static diode and a sixth bidirectional anti-static diode; One end of the fourth bidirectional anti-static diode is grounded, and the other end of the fourth bidirectional anti-static diode is electrically connected to the first resistor and the earphone interface module; One end of the fifth bidirectional anti-static diode is grounded, and the other end of the fifth bidirectional anti-static diode is electrically connected to the second resistor and the earphone interface module; One end of the sixth bidirectional anti-static diode is grounded, and the other end of the sixth bidirectional anti-static diode is electrically connected to the earphone interface module.

4. The overcurrent protection circuit of claim 1, wherein, The first audio input pin further has a first right channel audio contact; The second fuse is electrically connected to the first right channel audio contact and the control module; The second audio input pin is used for active connection of the aviation plug.

5. The overcurrent protection circuit of claim 1, wherein, The diameter of the first audio input pin is 2-4 mm.

6. The overcurrent protection circuit according to any one of claims 1 to 5, characterized in that, The circuit further comprises: a serial communication protection module, which comprises a serial communication interface and an overvoltage protection chip; The serial communication interface is electrically connected with the overvoltage protection chip, and the overvoltage protection chip is electrically connected with the control module; the overvoltage protection chip is used for overvoltage protection on the voltage input by the serial communication interface.

7. The overcurrent protection circuit according to any one of claims 1 to 5, characterized in that The circuit further comprises: A Bluetooth module, which is electrically connected with the control module and is used for Bluetooth communication connection with earphones.

8. The overcurrent protection circuit according to any one of claims 1 to 5, characterized in that The surface of the first audio input pin has a first plating layer, the surface of the second audio input pin has a second plating layer, and the materials of the first plating layer and the second plating layer are gold.

9. An aviation plug, characterized by, The aviation plug comprises the overcurrent protection circuit according to any one of claims 1 to 8.

10. The aerospace plug of claim 9, wherein, The aviation plug further comprises a shell; the first audio input pin of the overcurrent protection circuit has a first right channel audio contact; the second fuse is electrically connected with the first right channel audio contact and the control module; The second audio input pin of the overcurrent protection circuit is used for active connection with the shell.

Images