WO2016000611A1

WO2016000611A1 - Audio transmission circuit

Info

Publication number: WO2016000611A1
Application number: PCT/CN2015/083015
Authority: WO
Inventors: 陈�峰; 胡静
Original assignee: 王玮冰
Priority date: 2014-07-04
Filing date: 2015-07-01
Publication date: 2016-01-07
Also published as: CN105323676B; CN105323676A

Abstract

Disclosed is an audio transmission circuit. The audio transmission circuit includes an audio plug, at least one acoustic component and n subunits. Each subunit includes a first connection end and a second connection end. The first connection end is connected with the second connection end in each subunit. The second connection end of a previous subunit is selectively connected with the first connection end of a next subunit. A complete headset function is achieved when the signal conduction between the audio plug and the acoustic component is implemented via the subunits. At least one subunit includes a function module for accomplishing a preset function. Selection and application of a variety of functions is realized, thus improving the integration level of an apparatus.

Description

Audio transmission circuit

Technical field

The present invention relates to the field of audio device technologies, and in particular, to an audio transmission circuit.

Background technique

Headphones or headsets (headphones with microphones) are indispensable peripheral main electronic devices in modern main electronic devices such as mobile phones or tablets. Headphones bring great convenience and usefulness to our lives, and they are simple and fashionable to use. However, to date, the integration of peripheral main electronic devices such as headphones has been low, which not only increases the peripheral cost of the main electronic device, but also causes inconvenience to the user during use.

Summary of the invention

It is an object of the present invention to provide an audio transmission circuit that integrates an earphone with at least one functional device to implement selection or combination of functions, thereby improving integration of the device.

In order to solve the above technical problem, the present invention provides an audio transmission circuit for transmitting an audio signal, wherein the audio transmission circuit includes an audio plug, an audio component, and n subunits, and the audio plug and the audio component pass The subunit realizes signal conduction, and at least one of the subunits includes a function module capable of performing a preset function, where n≥2;

Each of the subunits includes a first connection end and a second connection end;

The second connection end of the sub-unit of the previous one is selectively connected to the first connection end of the latter sub-unit to implement signal conduction between the sub-units.

Further, the first connection end and the second connection end each include at least one connector, and when the second connection end of the current sub-unit is connected to the first connection end of the latter sub-unit, The connector of the first connection end is electrically connected to the connector of the corresponding second connection end.

Further, in each of the subunits, the first connection end includes a first signal connector, the second connection end includes a second signal connector, the first signal connector and the second The signal connector is electrically conductive;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the second signal connector of the previous subunit and the first signal connector of the latter subunit Electrical connection.

Further, the audio transmission circuit further includes an acoustic signal line, the acoustic signal line includes a first segment and a second segment, and one end of the first segment is connected to the audio plug, and the other end of the first segment Connecting a first signal connector of the first sub-unit, one end of the second segment is connected to the audio component, and the other end of the second segment is connected to a second signal connector of the nth sub-unit .

Further, the first connection end of each of the subunits further includes a first microphone connector, and the second connection end of the i th subunit further includes a second microphone connector;

In the i-th sub-unit, the first microphone connector and the second microphone connector are electrically connected;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the second microphone connector of the previous subunit and the first microphone connector of the latter subunit Electrical connection

The audio transmission circuit further includes a microphone signal line, one end of the microphone signal line is connected to the audio plug, and the other end of the microphone signal line is connected to the first microphone connector of the first sub-unit, 1≤ i ≤ n-1.

Further, the audio transmission circuit further includes a first wire control module, the first wire control module is located in one of the subunits, and the first wire control module is connected to the first microphone of the subunit where the subline unit is located Head connection.

Further, the audio transmission circuit further includes a first detection module, the first detection mode The block is located in the same sub-unit as the first wire control module, and the first detecting module detects the connection between the sub-unit in which the sub-unit is located and the adjacent sub-unit, and gives the first detection result to the The first line control module.

Further, the audio transmission circuit further includes at least one second wire control module, wherein the second wire control module and the first wire control module are located in different subunits, and the second wire control module and the location thereof The first microphone connector of the subunit is connected.

Further, the audio transmission circuit further includes a second detection module, the second detection module and the second remote control module are located in the same subunit, and the second detection module detects the subunit where the second detection module is located The connection with the adjacent subunits is sent to the second remote control module of the subunit where the second detection module is located.

Further, the kth subunit includes the second wire control module and the function module, and in the kth subunit, the second wire control module is connected to the function module, 1≤k≤ n.

Further, the nth subunit includes the function module, and in the nth subunit, the function module includes a Bluetooth earphone module.

Further, the n-1th subunit further includes the function module, in the n-1th subunit, the function module includes a battery module, and the n-1th subunit further includes a second connection end battery output connector, the battery module is connected to the battery output connector, and the first connection end of the nth subunit further includes a battery input connector, the battery input connector connection Bluetooth headset module;

When the second connection end of the n-1th subunit is connected to the first connection end of the nth subunit, the battery input connector is electrically connected to the battery output connector.

Further, the n-1th subunit further includes the function module, and in the n-1th subunit, the function module includes an interface protocol conversion module, and the n-1th subunit The second connection end further includes a first type interface connector, and the first connection end of the n-1th subunit further includes a second type interface connector, and the interface protocol conversion module respectively connects the One a type interface connector and a second type interface connector, the first connection end of the nth sub-unit further includes an interface connector of the Bluetooth headset module;

When the second connection end of the n-1th subunit is connected to the first connection end of the nth subunit, the interface connector of the Bluetooth earphone module is coupled with the first type interface connector .

Further, the nth subunit further includes a power management module, the power management module is connected to the Bluetooth headset module, and the power management module is further connected to the first signal connector and/or the first microphone connector .

Further, the jth subunit of the audio transmission circuit further includes a microphone module, and the microphone module is connected to the first microphone connector of the jth subunit, 1≤j≤n.

Further, in each of the subunits, the first connection end further includes a first ground signal connector, and the second connection terminal further includes a second ground signal connector, the first ground signal connector And the second ground signal connector is electrically connected;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the first ground signal of the previous subunit and the first ground signal of the latter subunit The connector is electrically connected.

Further, the audio transmission circuit further includes at least one control button, and the control button is electrically connected to the audio plug.

Further, at least the mth subunit includes the control button and the function module, and in the mth subunit, the control button is connected to the function module to control the function module, 1 ≤ m ≤ n.

Further, the audio transmission circuit further includes a first wire control module, the first wire control module is located in one of the subunits, and the first wire control module is electrically connected to the audio plug, The control button is first connected to the first wire control module, and is electrically connected to the audio plug through the first wire control module.

Further, the control button is located in at least one of the subunits, at least part of the first connection end includes a first control button connector, and at least part of the second connection end includes a second control button connector. The control button signal between the subunits is turned on by the first control button connector and the second control button connector.

Further, the function module includes one or more of a flash memory module, an audio codec module, an interface protocol conversion module, a sensor module, a wireless transceiver unit module, a battery module, and a CPU.

Further, the audio transmission circuit further includes another audio component and another acoustic signal line, and the other audio component is electrically connected to the audio plug through the other acoustic signal line.

Compared with the prior art, the audio transmission circuit provided by the present invention has the following advantages:

In the audio transmission circuit provided by the present invention, the audio transmission circuit includes an audio plug, an audio component, and n subunits, each of the subunits including a first connection end and a second connection end, in each of the In the subunit, the first connection end is connected to the second connection end; the second connection end of the previous subunit is selectively connected to the first connection end of the latter subunit. The first connection end and the second connection end can transmit signals such as an audio signal, and when the signal of the audio plug and the audio component is turned on by the subunit, a complete headphone function can be realized; at least one of the sub-functions The unit includes a function module that can perform preset functions, and can implement selection between multiple functions, thereby improving the integration of the device.

DRAWINGS

1 is a schematic diagram of an audio transmission circuit in a first embodiment of the present invention;

2 is a schematic diagram of a second subunit in the first embodiment of the present invention;

3 is a schematic diagram of an audio transmission circuit in a second embodiment of the present invention;

4 is a schematic diagram of a first subunit in a second embodiment of the present invention;

Figure 5 is a schematic diagram of a second subunit in the second embodiment of the present invention;

Figure 6 is a schematic diagram of a third subunit in a second embodiment of the present invention.

detailed description

The audio transmission circuit of the present invention will now be described in more detail with reference to the accompanying drawings, in which a preferred embodiment of the present invention is shown, and it is understood that those skilled in the art can modify the invention described herein while still achieving the advantages of the invention. Therefore, the following description is to be understood as a broad understanding of the invention.

In the interest of clarity, not all features of the actual embodiments are described. In the following description, well-known functions and structures are not described in detail, as they may obscure the invention in unnecessary detail. It should be understood that in the development of any actual embodiment, a large number of implementation details must be made to achieve a particular goal of the developer, such as changing from one embodiment to another in accordance with the limitations of the system or related business. Additionally, such development work should be considered complex and time consuming, but is only routine work for those skilled in the art.

The invention is more specifically described in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will be apparent from the description and appended claims. It should be noted that the drawings are in a very simplified form and all use non-precise proportions, and are only for convenience and clarity to assist the purpose of the embodiments of the present invention.

The core idea of the present invention is to provide an audio transmission circuit for transmitting an audio signal, the audio transmission circuit comprising an audio plug, an audio component and n subunits, the audio plug and the audio component pass The subunits implement signal conduction, and at least one of the subunits includes a function module that can perform a preset function, where n≥2; each of the subunits includes a first connection end and a second connection end; The second connection end of the sub-unit of the previous one is selectively connected to the first connection end of the latter sub-unit to implement signal conduction between the sub-units. When the signal connection of the audio plug and the audio component is realized by the subunit, a complete earphone function can be realized; at least one of the subunits includes a function capable of performing a preset function. The module can realize the selection between multiple functions to improve the integration of the device.

Several embodiments of the audio transmission circuit are listed below to clearly illustrate the contents of the present invention. It should be understood that the content of the present invention is not limited to the following embodiments, and other conventional techniques are used by those skilled in the art. Improvements are also within the scope of the inventive idea.

First embodiment

1 to 2, a first embodiment of the present invention is specifically illustrated in FIG. 1 , wherein FIG. 1 is a schematic diagram of an audio transmission circuit according to a first embodiment of the present invention; FIG. 2 is a second sub-unit of the first embodiment of the present invention. schematic diagram. In the present embodiment, the audio transmission circuit 1 includes two audio components: a first audio component 12 and a second audio component 13, wherein the first audio component 12 is a left earphone, and the second audio component 13 It is a right earplug; or the first acoustic component 12 is a right earplug, and the second acoustic component 13 is a left earplug. The audio transmission circuit 1 can implement a conventional earphone function to transmit an audio signal of the main electronic device to the left earphone and the right earplug.

As shown in FIG. 1, the audio transmission circuit 1 includes an audio plug 11, a first audio component 12 (left ear or right earplug), a second audio component 13 (right earplug or left earplug), and n subunits, n≥2 And n is a positive integer. For example, n is 2, 3, 4, 5, 6, or more. In FIG. 1, description is made with n being 2, that is, the audio transmission circuit 1 includes two subunits: a subunit 1U1 and a subunit 1U2. The audio plug 11 is configured to be connected to the main electronic device (mobile phone, media player or tablet computer, etc.), and the first audio component 12 and the second audio component 13 pass through at least one subunit (the first The subunit 1U1 and/or the second subunit 1U2) achieve signal conduction with the audio plug 11.

In the embodiment, the audio plug 11 includes a first channel terminal 111 (left channel terminal), a second channel terminal 112 (right channel terminal), and a ground terminal 113, wherein the first channel The terminal 111 is for transmitting a left channel signal HPL, and the second channel terminal 113 is for transmitting a right channel signal HPR. In other embodiments of the present invention, the audio transmission circuit 1 may further include only the first audio component 12 (left earphone), and does not include the second audio component 13 (right earplug). The audio plug 11 then includes only the first channel terminal 111 and does not include the second channel terminal 112.

Each of the subunits includes a first connection end and a second connection end, and the second connection end of the previous sub-unit is selectively connected to the first connection end of the latter sub-unit to implement the sub-unit The signal is turned on. In this embodiment, the sub-unit 1U1 includes a first connection end U1I and a second connection end U1O, the sub-unit 1U2 includes a first connection end U2I and a second connection end U2O, and the second connection end U1O is selected. The first connection terminal U2I is connected to the first connection.

Preferably, in each of the subunits, the first connection end includes a first signal connector, the second connection end includes a second signal connector, the first signal connector and the first The two signal connectors are electrically conductive. In this embodiment, the first connection terminal U1I includes a first signal connector U1HI, the second connector U1O includes a second signal connector U1HO, and the first connector U2I includes a first signal connector U2HI, and a second The connection terminal U2O includes a second signal connector U2HO. When the second connector U1O is connected to the first connector U2I, the second signal connector U1HO is connected to the first signal connector U2HI.

Generally, the first connection end further includes a first ground signal connector, the second connection terminal further includes a second ground signal connector, and the second connection end of the current one of the subunits is connected to the latter When the first connection end of the unit is connected, the second ground signal connection head of the previous sub-unit is electrically connected to the first ground signal connection head of the latter sub-unit. In this embodiment, the first connection terminal U1I includes a first ground signal connector U1GI, the second connection terminal U1O includes a second ground signal connector U1GO, the first connection terminal U2I includes a first ground signal connector U2GI, and a second The connection terminal U2O includes a second ground signal connector U2GO. When the second connection terminal U1O is connected to the first connection terminal U2I, the second ground signal connector U1GO is connected to the first ground signal connector U2GI. The first ground signal connector U1GI is used to connect the ground terminal 113, and the second ground signal connector U2GO is used to connect the first audio component 12.

In this embodiment, the first channel terminal 111 is fixedly connected to the first signal connector U1HI, in other embodiments of the present invention, the one-channel terminal 111 may be selectively connected to any of the first connection ends, that is, the first signal connection head U1HI or the A signal connector U2HI. In this embodiment, the first audio component 12 is fixedly connected to the second signal connector U2HO. In other embodiments of the present invention, the first audio component 12 can be selectively connected to any of the second components. The signal connector, that is, the second signal connector U1HO or the second signal connector U2HO can be selectively connected as needed.

Preferably, the audio transmission circuit 1 further includes an acoustic signal line 14. The audio signal line 14 includes a first segment 141 and a second segment 142. One end of the first segment 141 is connected to the audio plug 11 (connecting the first channel terminal 111), the other end of the first segment is connected to the first signal connector U1HI, and one end of the second segment 142 is connected to the first audio component 12, the second segment The other end of the 141 is connected to the second signal connector U2HO.

At least one of the subunits includes a function module that can perform a preset function, and the function module includes a flash memory module, an audio codec module, an interface protocol conversion module, and a sensor module (eg, a temperature sensor module, a humidity sensor) Module, pressure sensor module, magnetic sensor module, gas sensor module, light sensor module, motion sensor module, attitude sensor module, etc.), wireless transceiver unit module (such as Bluetooth, WIFI, ZigBee, etc.), battery One or several of the module and the CPU.

For example, in the embodiment, the subunit 1U2 includes one of the function modules 1F, as shown in FIG. 2, wherein the function module is a Bluetooth headset module, and the Bluetooth headset module is a module for implementing a Bluetooth headset function. The Bluetooth headset module includes all the components required to implement a complete Bluetooth headset (excluding components other than earplugs, such as components such as a microphone, a battery, etc.), the circuit structure of which is understood by those skilled in the art, Do not repeat them.

As shown in FIG. 2, the function module 1F is connected to the second signal connector U2HO and the first ground signal connector U2GO, respectively. In this embodiment, when the second signal connector U1HO is connected to the first signal connector U2HI (at the same time, the second ground signal connector) U1GO is connected to the first ground signal connector U2GI) to realize signal transmission between the first audio component 12, the second audio component 13 and the audio plug 11, the first audio component 12 and the second audio The component 13 receives the audio signal of the main electronic device; when the connection between the second signal connector U1HO and the first signal connector U2HI is disconnected (at the same time, the second ground signal connector) The connection of the U1GO to the first ground signal connector U2GI) is broken, and the first audio component 12 cannot receive the signal of the audio plug 11 through the acoustic signal line 14, the function module 1F The Bluetooth headset module can start working, and the first audio component 12 can receive the audio signal in a wireless manner. At this time, the subunit 1U2 and the first audio component 12 can be used as an ordinary Bluetooth headset. use.

Of course, the subunit 1U1 may also include a flash module, an audio codec module, an interface protocol conversion module, and a sensor module (such as a temperature sensor module, a humidity sensor module, a pressure sensor module, a magnetic sensor module, and a gas). Sensor module, light sensor module, motion sensor module, attitude sensor module, etc.), wireless transceiver unit module (such as Bluetooth, WIFI, ZigBee, etc.), battery module and CPU and other functional modules, can make the audio transmission Circuit 1 has more functions.

In this embodiment, the first connection end includes a first signal connector and a first ground signal connector, and the second connector includes a second signal connector and a second ground signal connector. The connection manner of the connection head of the first connection end and the connection head of the corresponding second connection end is not specifically limited. For example, the connection head of the previous sub-unit can be connected by a pin structure. The connector of the subunit, for example, the connector of the subunit of the previous one may also be connected to the connector of the latter subunit by a USB interface structure, and, for example, the connector of the subunit of the previous one is also The connector of the latter subunit can be connected through a connecting line, etc., as long as the signal conduction of the connector of the previous subunit and the connector of the latter subunit can be realized, also in the present invention. Within the scope of thought. Moreover, a connector of a plurality of connection modes may be included in the same audio transmission circuit.

Second embodiment

Referring to FIG. 3 to FIG. 6 , a second embodiment of the present invention is specifically illustrated. FIG. 3 is a schematic diagram of an audio transmission circuit according to a second embodiment of the present invention; FIG. 4 is a first sub-unit of the second embodiment of the present invention; FIG. 5 is a schematic diagram of a second subunit according to a second embodiment of the present invention; and FIG. 6 is a schematic diagram of a third subunit according to the second embodiment of the present invention. In FIGS. 3 to 6, reference numerals denote the same components as those of the first embodiment, which are the same as those of the first embodiment. The audio transmission circuit 2 of the second embodiment is substantially the same as the audio transmission circuit 1 of the first embodiment, except that the first connection end of each of the subunits further includes a first microphone connector. The second connection end of the i-th sub-unit further includes a second microphone connector, wherein 1≤i≤n-1, the audio transmission circuit 2 can implement a conventional headset function. In FIG. 3, the audio transmission circuit 2 includes three subunits as an example for description. In the present embodiment, the audio transmission circuit 2 includes three subunits: a first subunit 2U1, a second subunit 2U2, and a third subunit 2U3.

The subunit 2U1 includes a first connection end U1I and a second connection end U1O, the subunit 2U2 includes a first connection end U2I and a second connection end U2O, and the subunit 2U3 includes a first connection end U3I and a second a connection terminal U3O, the second connection terminal U1O selectively connecting the first connection terminal U2I or the first connection terminal U3I to implement the audio signal (left channel signal HPL) in the audio plug 11 and The first acoustic component 12 (left earplug) is transferred between.

In the subunit 2U1, the first connection terminal U1I includes a first signal connector U1HI, the second connector terminal U1O includes a second signal connector U1HO, and the first signal connector U1HI and the device The second signal connector U1HO is electrically conductive; in the subunit 2U2, the first connection terminal U2I includes a first signal connector U2HI, and the second connector terminal U2O includes a second signal connector. U2HO, the first signal connector U2HI and the second signal connector U2HO are electrically connected; in the subunit 2U3, the first connector U3I includes a first signal connector U3HI, The second connection terminal U3O includes a second signal connection The head U3HO, the first signal connector U3HI and the second signal connector U3HO are electrically turned on. When the second connection terminal U1O is selectively connected to the first connection terminal U2I or the first connection terminal U3I, the second signal connector U1HO selectively connects the first signal connector U2HI or the first A signal connector U3HI is implemented to effect transmission of the audio signal (left channel signal HPL) between the audio plug 11 and the first audio component 12 (left earbud).

Generally, in each of the subunits, the first connection end further includes a first ground signal connector, and the second connection end further includes a second ground signal connector, the first ground signal connector And the second ground signal connector is electrically connected. When the second connection end of the subunit is connected to the first connection end of the subunit, the second ground signal of the previous subunit The connector is electrically connected to the first ground signal connector of the latter subunit. In this embodiment, the first connection terminal U1I includes a first ground signal connector U1GI, the second connection terminal U1O includes a second ground signal connector U1GO, and the first ground signal connector U1GI and the second ground signal connector The U1GO is electrically conductive; the first connection terminal U2I includes a first ground signal connector U2GI, and the second connection terminal U2O includes a second ground signal connector U2GO, the first ground signal connector U2GI and the second ground signal connector The U2GO is electrically conductive; the first connection terminal U3I includes a first ground signal connector U3GI, the second connection terminal U3O includes a second ground signal connector U3GO, the first ground signal connector U3GI and the second ground signal connector U3GO is electrically conductive. When the second connection terminal U1O is selectively connected to the first connection terminal U2I or the first connection terminal U3I, the second ground signal connector U1GO selectively connects the first ground signal connector U2GI or the The first ground signal connector U3GI is described. The first ground signal connector U1GI (the first ground signal connector of the first subunit) is used to connect the ground terminal 113, and the first ground signal connector U3GO (the nth sub A second ground signal connector of the unit is used to connect the first audio component 12.

As shown in FIG. 3, in the embodiment, the audio plug 21 further includes a microphone terminal 214 to receive the microphone signal MIC. The audio transmission circuit 2 further includes a microphone signal line 25, To transmit the microphone signal MIC.

The first microphone connector is connected to the second microphone connector in the i-th sub-unit; the second connector of the current sub-unit is connected to the first connection of the latter sub-unit The second microphone connector of the previous subunit is electrically connected to the first microphone connector of the latter subunit. In the subunit 2U1, the first connection terminal U1I includes a first microphone connector U1MI, the second connector terminal U1O includes a second microphone connector U1MO, and the first microphone connector U1MI and the device The second microphone connector U1MO is electrically conductive; in the subunit 2U2, the first connector U2I includes a first microphone connector U2MI, and the second connector U2O includes a second microphone connector U2MO. The first microphone connector U2MI and the second microphone connector U2MO are electrically connected; in the subunit 2U3, the first connector U3I includes a first microphone connector U3MI. The second microphone connector U1MO is selectively connected to the first microphone connector U2MI, the second microphone connector U2MO is selectively connected to the first microphone connector U3MI, and further, the second microphone connector U1MO The first microphone connector U3MI can also be selectively connected, the subunit 2U1 is directly connected to the subunit 2U3, and when the second microphone connector U1MO is connected to the first microphone connector U3MI, the sub The unit 2U2 does not need to access between the audio plug 21 and the first audio component 12 to realize signal transmission between the audio plug 21 and the first audio component 12.

In this embodiment, the microphone terminal 214 is fixedly connected to the first microphone connector U1MI (the first microphone connector of the first subunit), and in other embodiments of the invention, the microphone terminal 214 can selectively connect any of the first microphone connectors, that is, the first microphone connector U1MI, the first microphone connector U2MI, or the first microphone connector U3MI can be selectively connected as needed.

Preferably, one end of the microphone signal line 25 is connected to the audio plug 21 (connecting the microphone terminal 214), and the other end of the microphone signal line 25 is connected to the first sub-unit 2U1. The first connection U1MI.

The audio transmission circuit 2 further includes a first wire control module, the first wire control module is located in one of the subunits, and the first wire control module is connected to the first microphone of the subunit where the subwire unit is located The first connection module enables the first wire control module to indirectly control the playback volume of the left channel and the right channel by communicating with the main electronic device, and can also control the working state of the microphone signal, and the circuit of the first wire control module The structure can be understood by those skilled in the art and will not be described herein. Preferably, as shown in FIG. 4, the first sub-unit 2U1 includes a first wire control module 211, and the first wire control module 211 is connected to the first microphone connector U1MI.

The audio transmission circuit 2 further includes a first detection module 212, and the first detection module 212 and the first remote control module 211 are located in the same subunit, and are located in the first subunit 2U1. The first detecting module 212 detects the connection between the first sub-unit 2U1 and the second sub-unit 2U2, and sends a first detection result to the first remote control module 211.

In addition, the audio transmission circuit 2 further includes at least one second remote control module, where the first remote control module and the second remote control module are located in different subunits, and the second remote control module and the location thereof The first microphone connector of the subunit is connected. In this embodiment, as shown in FIG. 5, the second sub-unit 2U2 includes a second wire control module 221, and the second wire control module 221 is connected to the first microphone connector U2MI; The third sub-unit 2U3 includes a second wire control module 231, and the second wire control module 231 is connected to the first microphone connector U3MI.

In this embodiment, the audio transmission circuit 2 further includes a second detection module, the second detection module and the corresponding second remote control module are located in the same subunit, and the second detection module detects The connection between the subunit and the adjacent subunit, and sends a second detection result to the second remote control module of the subunit where the second detection module is located. As shown in FIG. 5, the second sub-unit 2U2 further includes a second detecting module 222, and the second detecting module 222, detecting the connection between the subunit 2U2 and the subunit 2U1 and the subunit 2U3, the second detecting module 222 is connected to the second line control module 221; as shown in FIG. 6, the third subunit 2U3 is further The second detecting module 232 is configured to detect the connection between the subunit 2U3 and the second subunit 2U2, and the second detecting module 232 is connected to the second remote control module 231. The detecting module (including the first detecting module and the second detecting module) can detect the connection state of at least one connector of the subunit in which the subunit is located (the detecting mechanism can be mechanical or electronic), which is the field. The ordinary person skilled in the art can understand that it will not be described here.

Preferably, the kth subunit includes the second wire control module and the function module, and in the kth subunit, the second wire control module is connected to the function module, so that the The second wire control module can control the operation of the function module, 1≤k≤n. For example, in the embodiment, as shown in FIG. 5, the second sub-unit 2U2 further includes a function module 2F2, and the second line control module 221 is connected to the function module 2F2; as shown in FIG. The three sub-units 2U3 further include a function module 2F3, and the second line control module 231 is connected to the function module 2F3.

As shown in FIG. 6, the function module 2F3 is a Bluetooth headset module, and the second line control module 231 is connected to the Bluetooth headset module 2F3. The Bluetooth earphone module 2F3 includes all components required for implementing a complete Bluetooth headset (removing components other than earplugs, such as components such as a microphone, a battery, etc.), and the Bluetooth headset module 2F3 may have a four-wire USB connector. (VUSB connector, D connector, D+ connector, ID connector, GND connector, GND connector may be multiplexed with the first ground signal connector U3GI) to charge the Bluetooth headset module 2F3.

As shown in FIG. 5, the second sub-unit 2U2 further includes a function module 2F2, the function module 2F2 includes a battery module, and the second connection end U2O of the second sub-unit 2U2 further includes a battery output connector. U2TO, the battery module is connected to the battery output connector U2TO. As shown in FIG. 6, the first connection end U3I of the third sub-unit 2U3 further includes a battery input connector U3TI, and the battery input connector U3TI is connected to the Bluetooth earphone module 2F3, the battery input connector The U3TI is selectively coupled to the battery output connector U2TO such that the battery module can charge the Bluetooth headset module 2F3.

Of course, the function module 2F2 may further include an interface protocol conversion module for converting between different types of interfaces. For example, the second connection end U2O of the second sub-unit 2U2 further includes a first type interface connector (in this embodiment, a four-wire USB connector: a VUSB' connector, a D-' connector, D+ The 'connecting head, the ID' connector, the GND connector, the GND connector may be multiplexed with the second ground signal connector U2GO), and the first connector U2I of the second sub-unit 2U2 further includes a second Type interface connector (8-pin USB<7:0> or <8:1> in this embodiment), the interface protocol conversion module respectively connecting the first type interface connector and the second type interface connector . When the second connection terminal U2O of the second sub-unit 2U2 is connected to the first connection terminal U3I of the third sub-unit 2U3, the four-wire USB connector of the Bluetooth headset module 2F3 is connected to the first type. The interface connector is mated so that the Bluetooth headset module 2F3 can be charged by the second type of interface connector USB<7:0>.

Preferably, as shown in FIG. 6, the third sub-unit 2U3 further includes a power management module (PMIC) 233, the power management module 233 is connected to the Bluetooth headset module 2F3, and the power management module is 233 is further connected to the first connection terminal U3HI and/or the first microphone connector U3MI to charge the Bluetooth earphone module 2F3 through the first connection terminal U3HI and/or the first microphone connector U3MI.

As shown in FIG. 4, the first sub-unit 2U1 further includes a microphone module 213, and the microphone module 213 is connected to the second microphone connector U1MI of the first sub-unit 2U1. In other embodiments of the present invention, the microphone module 213 may also be disposed in the second sub-unit 2U2 or the third sub-unit 2U3. According to the above description, the setting may be a person of ordinary skill in the art. Understand, do not repeat here.

Preferably, the audio transmission circuit 2 further includes at least one control button, and the control button is electrically connected to the audio plug 21, so that the signal of the control button and the main electronic device is turned on. In this embodiment, the control button includes a volume up button K+, a volume down button K-, and an answer button Kc. In the embodiment, the volume increase key K+, the volume decrease key K-, and the answer key Kc are connected to the first wire control module 211, and the first wire control module 211 is implemented with the main electronic device. The signal is turned on. In other embodiments of the present invention, the volume up key K+, the volume down key K-, and the answer key Kc are respectively connected to different wire control modules, for example, a volume down key K-connects the first wire control The module 211, the answering key Kc is connected to the second wire control module 221, the volume increasing key K+ is connected to the second wire control module 231, and the volume increasing key K+, the volume decreasing key K- and the answering key Kc are respectively passed through The second wire control module 231, the second wire control module 221, and the first wire control module 211 implement signal conduction with the main electronic device.

The volume increase key K+, the volume decrease key K-, and the answer key Kc may be separately or together set in any one of the subunits or several subunits. Preferably, the volume down key K- is disposed in the first subunit 2U1, as shown in FIG. 4; the answer key Kc is disposed in the second subunit 2U2, as shown in FIG. The volume down key K- is set in the third sub-unit 2U3 as shown in FIG.

As shown in FIG. 4, the second connection terminal U1O of the first sub-unit 2U1 further includes a second control button connector U1VO and a second control button connector U1cO for transmitting control button signals (volume signal + and answer signal). c); as shown in FIG. 5, the first connection end U2I of the second sub-unit 2U1 further includes a first control button connector U2VI, and the first control button connector U2cI transmits a control button signal (volume signal + And the answering signal c), the second connecting end U2O further includes a second control button connector U2VO for transmitting a control button signal (volume signal +), the first control button connector U1VI is connected to the second control button a connector U2VO, the first control button connector U2cI is connected to the answer button Kc; as shown in FIG. 6, the third speaker The first connection end U3I of the unit 2U3 further includes a first control button connector U3VO for transmitting a control button signal (volume signal +), the first control button connector U3VO is connected to the answer button K+; Controlling the connection between the button connector and the corresponding second control button connector to achieve conduction of the control button signal between the subunits.

In this embodiment, as shown in FIG. 5, the answer key Kc is connected to the function module 2F2, and when the second sub-unit 2U2 is not connected to the main electronic device, the answer key Kc is controlled. The function module 2F2; as shown in FIG. 6, the volume increase key K+ is connected to the function module 2F3, and when the third sub-unit 2U3 is not connected to the main electronic device, the volume increase button K+ controls the function module 2F3.

Therefore, as shown in FIG. 5, the second detecting module 222 is connected to the function module 2F2, and when the second sub-unit 2U2 is connected to the main electronic device, the second detecting module 222 is used. The data transmission between the function module 2F2 and the main electronic device is implemented; as shown in FIG. 6, the second detection module 232 is connected to the function module 2F3, and when the third sub-unit 2U3 is When the main electronic device is connected, the second detecting module 232 is configured to implement data transmission between the function module 2F3 and the main electronic device.

The audio transmission circuit 2 can be divided into an integrated working mode and a split working mode when performing work:

1. The integrated working mode, as shown in FIG. 3, the subunit 2U1 is connected to the subunit 2U2, the subunit 2U2 is connected to the subunit 2U3, and the first connecting end U2I is connected. The header is connected to a corresponding connector of the second connection terminal UIO, and the connector of the first connection terminal U3I is connected to a corresponding connector of the second connection terminal U2O. At this time, the audio plug 11 is inserted into the audio jack of the main electronic device, and the wire control module on each of the subunits handshaking with the main electronic device through the microphone signal line 25 to establish communication. To implement a plurality of configuration modes, each functional part is configured by the main electronic device, including configuration mode a, configuration mode b, configuration mode c, and configuration mode d:

In configuration mode a, the main electronic device controls to turn off the Bluetooth headset module 2F3, and turns off the power management module 233 to close the function module 2F2. The volume increase key K+, the volume decrease key K-, and the answer key Kc are connected to the first wire control module 211, thereby implementing a conventional wired headset function;

In configuration mode b, the main electronic device controls to turn off the Bluetooth headset module 2F3, activate the power management module 233, and activate a low-resistance driving MIC line mode (continuous or intermittent mode) to implement the Bluetooth headset module 2F3. Charging batteries;

In configuration mode c, the main electronic device controls to turn on the Bluetooth headset module 2F3, but turns off the HPL driver of the Bluetooth headset module 2F3, and the main electronic device performs wired communication and pairing with the Bluetooth headset module 2F3. The Bluetooth headset module 2F3 can implement all functions except for driving the first audio component 12, such as implementing wireless communication with other main electronic devices, and transmitting various sensor data on each of the subunits.

With configuration mode d, the above three or more configurations can be mixed to achieve more functions.

2. Split working mode, including split working mode 1), split working mode 2), split working mode 3)

Split working mode 1): the subunit 2U1 is connected to the subunit 2U2, the subunit 2U2 is disconnected from the subunit 2U3, and the connector of the first connecting end U2I is connected The corresponding connector of the second connection terminal UIO, the connector of the first connection terminal U3I is not connected to the corresponding connector of the second connection terminal U2O.

At this time, the second detecting module 222 of the subunit 2U2 detects that the subunit 2U2 disconnects from the subunit 2U3, and notifies the main electronic device and each connected module, the subunit 2U3 The second detecting module 232 detects that the subunit 2U2 disconnects from the subunit 2U3 and notifies the Bluetooth headset module 2F3. If the subunit 2U2 disconnects from the subunit 2U3, the audio transmission circuit 2 is in a call state:

The main electronic device is configured to close each module of the subunit 2U1 and the subunit 2U2 Block, the Bluetooth headset module 2F3 automatically starts, and drives the HPL port of the Bluetooth headset module 2F3 to the first audio component 12, activates the microphone of the Bluetooth headset module 2F3, and the paired primary electronic device Realize the call, this is the "hot pull" function, which realizes the seamless conversion from wired call to wireless call;

Or, the main electronic device configuration keeps the opening of each module of the subunit 2U1 and the subunit 2U2, and continues the call, but can only talk in mono, and the Bluetooth headset module 2F3 automatically enters the manual at this time. Start preparation state.

Splitting mode 2): Afterwards, the subunit 2U1 disconnects from the subunit 2U2, and the connector of the first connector U2I is not connected to the corresponding connector of the second connector UIO . The detecting module 213 of the subunit 2U1 detects that the subunit 2U1 disconnects from the subunit 2U2, and notifies the main electronic device and each connected module; the second detecting module of the subunit 2U2 222 detects that the subunit 2U1 disconnects from the subunit 2U2 and notifies the interface protocol conversion module 2F2 (this chip is used to convert the USB interface into an 8-pin interface). If the wired headset is in a call state when the subunit 2U1 disconnects from the subunit 2U2, the subunit 2U1 continues to remain in a call state. The subunit 2U2 can be used independently, and the subunit 2U3 originally extracted is also used independently.

Split working mode 3): disconnecting the subunit 2U1 from the subunit 2U2, the subunit 2U2 disconnecting from the subunit 2U3, the connection of the first connecting end U2I The header is not connected to the corresponding connector of the second connector UIO, and the connector of the first connector U3I is not connected to the corresponding connector of the second connector U2O. The detecting module of the subunit 2U1 detects that the subunit 2U1 disconnects from the subunit 2U2, and notifies the main electronic device and each connected module. The second detecting module 222 of the subunit 2U2 detects that the subunit 2U1 disconnects from the subunit 2U2, and notifies the conversion chip and the Bluetooth earphone module 2F3. If the cable headset is in a call state when it is unplugged:

The main electronic device is configured to close the subunit 2U3, and the Bluetooth headset module 2F3 is configured by Dynamically starting, and driving the HPL port of the Bluetooth earphone module 2F3 to the first audio component 12, starting the microphone of the Bluetooth earphone module 2F3, and implementing a call with the paired main electronic device, which is "hot pull" "Features, that is, seamless conversion from wired call to wireless call;

Or, the main electronic device configures the main electronic device to maintain the opening of each module of the subunit 2U1, and continues the call, but can only talk in mono, and the Bluetooth headset module 2F3 automatically enters the manual at this time. In the ready state, the subunit 2U2 enters the interface transition state.

Similarly, in this embodiment, the connection manner of the connector of the previous subunit and the connector of the latter subunit is not specifically limited. For example, the connector of the previous subunit can be inserted. The connector structure of the subunit is connected to the connector of the subunit, and the connector of the subunit may be connected to the connector of the subunit by a USB interface structure, for example, the former The connector of the unit may also be connected to the connector of the latter subunit through a wire structure, etc., as long as the signal of the first connection end of the previous subunit and the first connection end of the latter subunit may be realized. It is also within the scope of the inventive concept, which can be understood by those skilled in the art, and will not be described herein.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

An audio transmission circuit for transmitting an audio signal, characterized in that the audio transmission circuit comprises an audio plug, an audio component and n subunits, and the audio plug and the audio component realize signal conduction through the subunit. At least one of the subunits includes a functional module that can perform a preset function, where n is an integer of ≥2;

Each of the subunits includes a first connection end and a second connection end;

The second connection end of the sub-unit of the previous one is selectively connected to the first connection end of the latter sub-unit to implement signal conduction between the sub-units.
The audio transmission circuit according to claim 1, wherein the first connection end and the second connection end each comprise at least one connection head, and the second connection end of the current one of the sub-units is connected to the latter When the first connection end of the sub-unit is described, the connection head of the first connection end is electrically connected to the connection head of the corresponding second connection end.
The audio transmission circuit of claim 2, wherein in each of the subunits, the first connection end comprises a first signal connection head, and the second connection end comprises a second signal connection The first signal connector and the second signal connector are electrically connected;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the second signal connector of the previous subunit and the first signal connector of the latter subunit Electrical connection.
The audio transmission circuit according to claim 3, wherein said audio transmission circuit further comprises an acoustic signal line, said one acoustic signal line comprising a first segment and a second segment, one end of said first segment being connected The audio plug, the other end of the first segment is connected to the first signal connector of the first sub-unit, one end of the second segment is connected to the audio component, and the other end of the second segment is connected A second signal connector of the nth said subunit.
The audio transmission circuit according to claim 3, wherein the first connection end of each of the subunits further includes a first microphone connector, and the second connection end of the i th Two microphone connector;

In the i-th sub-unit, the first microphone connector and the second microphone connector are electrically connected;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the second microphone connector of the previous subunit and the first microphone connector of the latter subunit Electrical connection

The audio transmission circuit further includes a microphone signal line, one end of the microphone signal line is connected to the audio plug, and the other end of the microphone signal line is connected to the first microphone connector of the first sub-unit, wherein i is an integer and 1 ≤ i ≤ n-1.
The audio transmission circuit according to claim 5, wherein the audio transmission circuit further comprises a first wire control module, the first wire control module is located in one of the subunits, and the first wire control module Connected to the first microphone connector of the subunit in which it is located.
The audio transmission circuit according to claim 6, wherein the audio transmission circuit further comprises a first detection module, wherein the first detection module and the first remote control module are located in the same subunit, The first detecting module detects the connection between the subunit where the subunit is located and the adjacent subunit, and gives the first detection result to the first remote control module.
The audio transmission circuit according to claim 6, wherein the audio transmission circuit further comprises at least one second remote control module, wherein the second remote control module and the first remote control module are located in different subunits The second wire control module is connected to the first microphone connector of the subunit in which it is located.
The audio transmission circuit according to claim 8, wherein said audio transmission circuit further comprises a second detection module, said second detection module and said corresponding second remote control module In the same subunit, the second detecting module detects the connection between the subunit where the subunit is located and the adjacent subunit, and sends the second detection result to the subunit of the second detecting module. The second remote control module.
The audio transmission circuit according to claim 8, wherein the kth subunit comprises the second wire control module and the function module, and in the kth subunit, the second wire control The module is coupled to the functional module, wherein k is an integer and 1≤k≤n.
The audio transmission circuit according to claim 10, wherein the nth subunit comprises the function module, and in the nth subunit, the function module comprises a Bluetooth headset module.
The audio transmission circuit according to claim 11, wherein the n-1th subunit further comprises the function module, and in the n-1th subunit, the function module comprises a battery module The second connection end of the n-1th subunit further includes a battery output connector, the battery module is connected to the battery output connector, and the first connection end of the nth subunit further includes a a battery input connector, the battery input connector is connected to the Bluetooth headset module;

When the second connection end of the n-1th subunit is connected to the first connection end of the nth subunit, the battery input connector is electrically connected to the battery output connector.
The audio transmission circuit according to claim 11, wherein the n-1th subunit further comprises the function module, and in the n-1th subunit, the function module comprises an interface protocol a conversion module, the second connection end of the n-1th subunit further includes a first type interface connector, and the first connection end of the n-1th subunit further includes a second type interface connector The interface protocol conversion module is respectively connected to the first type interface connector and the second type interface connector, and the first connection end of the nth sub-unit further includes an interface connector of the Bluetooth headset module;

When the second connection end of the n-1th subunit is connected to the first connection of the nth subunit When the terminal is connected, the interface connector of the Bluetooth earphone module is mated with the first type of interface connector.
The audio transmission circuit of claim 11, wherein the nth subunit further comprises a power management module, the power management module is connected to the Bluetooth headset module, and the power management module is further connected to the A signal connector and/or a first microphone connector.
The audio transmission circuit according to claim 5, wherein said jth said subunit of said audio transmission circuit further comprises a microphone module, said microphone module being connected to said first microphone connection of said jth said subunit Head, where j is an integer and 1 ≤ j ≤ n.
The audio transmission circuit of claim 3, wherein in each of the subunits, the first connection end further comprises a first ground signal connector, and the second connection end further comprises a second ground a signal connector, the first ground signal connector and the second ground signal connector are electrically connected;

When the second connection end of the subunit is connected to the first connection end of the latter subunit, the first ground signal of the previous subunit and the first ground signal of the latter subunit The connector is electrically connected.
The audio transmission circuit according to claim 1, wherein said audio transmission circuit further comprises at least one control button, said control button being electrically connected to said audio plug.
The audio transmission circuit according to claim 17, wherein at least the mth of said subunits comprises said control button and said function module, and in said mth said subunit, said control button and said The functional modules are connected to control the functional modules, where m is an integer and 1 ≤ m ≤ n.
The audio transmission circuit according to claim 17, wherein said audio transmission circuit further comprises a first wire control module, said first wire control module being located in one of said subunits, said first wire control module Electrically conducting with the audio plug, the control button first connecting the first line The control module is electrically connected to the audio plug through the first wire control module.
The audio transmission circuit according to claim 17, wherein said control button is located in at least one of said subunits, and at least part of said first connection end comprises a first control button connector, at least part of said The second connection end includes a second control button connection head, and the control button signal between the sub-units is turned on by the first control button connector and the second control button connector.
The audio transmission circuit according to claim 1, wherein the function module comprises one of a flash memory module, an audio codec module, an interface protocol conversion module, a sensor module, a wireless transceiver unit module, a battery module, and a CPU. Or several.
The audio transmission circuit according to claim 1, wherein said audio transmission circuit further comprises another audio component and another acoustic signal line, said another audio component being realized by said another acoustic signal line The signal of the audio plug is turned on.