Functional earphone capable of realizing modular disassembly and assembly

Abstract

The invention relates to the technical field of earphones, in particular to a functional earphone capable of realizing modular disassembly and assembly, which comprises a head band, one end of the head band is provided with a first ear muff, the other end of the head band is provided with a second ear muff, and the first ear muff and the second ear muff are both integrally provided with a circuit conduction connecting plate and a loudspeaker electrically connected to the circuit conduction connecting plate. The earphone further comprises a main machine, an auxiliary machine and a connecting wire, electric appliance connecting structures are arranged between the main machine and the first ear muff and between the auxiliary machine and the second ear muff, the main machine and the first ear muff are in detachable electric appliance connection through the electric appliance connecting structures, the auxiliary machine and the second ear muff are in detachable electric appliance connection through the electric appliance connecting structures, and the circuit conduction connecting plate is electrically connected with the electric appliance connecting structures. The connecting wire is arranged to electrically connect the main machine and the auxiliary machine; therefore, the user can selectively match different earphones according to own needs or favorite styles, and more flexible use experience is brought to the user.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and in particular to a functional earphone that can realize modular disassembly and assembly. Background Art

[0002] Headphones are a type of sound transmission device that converts the electrical signals of audio output into sounds audible to the human ear through the principle of electro-acoustic conversion. Based on the way the headphones are worn, they are mainly divided into earbud type, ear-hook type, in-ear type and head-mounted headphones.

[0003] Existing headphones have a wide range of application prospects, which take into account wearing comfort, wearing size, broadcasting effect, portability, flexibility and the like. In terms of portability and flexibility, the head-mounted headphones will integrate a wireless audio transceiver module and a power supply module, so that the headphones can be connected to the corresponding terminal device for audio without using a headphone cable; however, wireless headphones need to be charged, and in some occasions, such as when listening to music and walking outdoors, when the headphone is low on power and cannot be charged, it will affect the user's mood for walking to a certain extent, or in other cases, when the headphone is low on power and needs to be used, it will cause a certain degree of trouble to the user; In addition, with the improvement of people's living standards, there is a higher pursuit for the appearance of headphones and the flexible design of appearance changes. Traditional headphones are generally set to a structure that cannot be disassembled by users, and the structural design is fixed, and it is impossible to replace a module with a different design style. Therefore, it is necessary to propose an improved technical solution to solve the above problems. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the present invention aims to provide a technical solution that can solve the above-mentioned problems.

[0005] A functional earphone that can realize modular disassembly and assembly comprises a headband, wherein a first ear bag is arranged at one end of the headband, and a second ear bag is arranged at the other end of the headband, wherein the first ear bag and the second ear bag are both integrated with a line conduction connection board and a speaker electrically connected to the line conduction connection board, and further comprises a main unit, an auxiliary unit and a connecting line, wherein an electrical connection structure is arranged between the main unit and the first ear bag and between the auxiliary unit and the second ear bag, wherein the main unit and the first ear bag and between the auxiliary unit and the second ear bag are both detachably electrically connected through the electrical connection structure, and the line conduction connection board is electrically connected to the electrical connection structure, and the connecting line is arranged to electrically connect the main unit and the auxiliary unit, or the connecting line is arranged to electrically connect the first ear bag and the second ear bag, so that the main unit, the auxiliary unit, the first ear bag and the second ear bag are electrically connected through the connecting line; Among them, the main machine is integrated with a power supply module and a first additional function module electrically connected to the electrical connection structure, the auxiliary machine is integrated with a second additional function module electrically connected to the electrical connection structure, and the main machine or the auxiliary machine is also integrated with a wireless audio transceiver module electrically connected to the electrical connection structure.

[0006] Preferably, the electrical connection structure includes a universal serial bus plug and a universal serial bus socket that are connected to each other, and the main unit and the first ear pack, as well as the auxiliary unit and the second ear pack, are mechanically and electrically connected through the connection of the universal serial bus plug and the universal serial bus socket.

[0007] Preferably, the electrical connection structure includes two groups of magnets that are positioned and matched with each other and a plurality of conductive contacts arranged on the magnets. The main unit and the first ear bag, as well as the auxiliary unit and the second ear bag, are mechanically connected by the magnetic attraction of the magnets, and the main unit and the first ear bag, as well as the auxiliary unit and the second ear bag are electrically connected by the contact of the conductive contacts.

[0008] Preferably, the first additional function module and the second additional function module are both lamp bead boards, and the lamp bead boards are electrically connected to the circuit conduction connection board through an electrical connection structure.

[0009] Preferably, a charging interface is provided on the host, and the power supply module is electrically connected to the charging interface.

[0010] Preferably, the first ear bag or the second ear bag is also provided with an audio interface electrically connected to the line conduction connection board, and the audio interface is connected to a headphone cable.

[0011] Preferably, the connecting wire is arranged inside the headband, and two ends of the connecting wire are respectively inserted into the first ear bag and the second ear bag along the inside of the headband to be directly electrically connected to the line conduction connecting plate.

[0012] Preferably, a first wiring interface connected to the line conduction connection plate is provided on both the first ear package and the second ear package, and two ends of the connecting line are respectively connected to the first wiring interface of the first ear package and the second ear package.

[0013] Preferably, a second wiring interface is provided on both the main unit and the auxiliary unit, the two ends of the connecting line are respectively connected to the second wiring ports of the main unit and the auxiliary unit, and the electrical connection structure, the first function additional module, the second function additional module and the wireless audio transceiver module are all electrically connected to the second wiring interface.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The main unit and auxiliary unit adopt a detachable structure, so that when not in use, they can be disassembled to achieve higher storage space, and the main unit and auxiliary unit of different design styles can be replaced according to user needs, or the structure of the ear bag and headband can be replaced, so as to achieve the purpose of replacing different types of speakers. In actual applications, for example, in some scenes where interaction is carried out through headphones, different types of main units and auxiliary units can be set by setting different sound channels, and different types of ear bags and headband structures can be set according to the types of speakers, so that users can choose to match different headphones according to their needs or favorite styles, giving users a more flexible user experience.

[0015] Relying on the detachable and replaceable method, the first additional function module and the second additional function module are set up, which can provide customers with more additional function options when using the headphones. The first additional function module and the second additional function module can be lamp bead boards, which are electrically connected to the line conduction connection board through an electrical connection structure. The lamp bead board can produce lighting effects synchronized with the broadcast according to the received voice digital signal, and can also control the light emission of the lamp bead board by setting a corresponding SOC module on the line conduction connection board. The first additional function module and the second additional function module can also be electronic components that can produce other functions, such as external speakers, display screens, power-on action components, etc., which are set according to actual needs.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 is a structural schematic diagram of Embodiment 1 of the electrical connection structure of the present invention; Figure 3 is a structural schematic diagram of Embodiment 2 of the electrical connection structure of the present invention; Figure 4 It is a schematic diagram of the structure of the present invention in a wired connection state; Figure 5 It is a schematic diagram of the structure of Example 1 of the wiring in the present invention; Figure 6 is a circuit module connection block diagram of wiring embodiment 1 of the present invention; Figure 7 It is a structural schematic diagram of embodiment 2 of the wiring in the present invention; Figure 8 It is a circuit module connection block diagram of wiring embodiment 2 of the present invention; Fig. 9 It is a schematic diagram of the structure of Example 3 of the wiring in the present invention; Fig.10 This is a circuit module connection block diagram of wiring embodiment 3 of the present invention.

[0019] The reference numerals and names in the figures are as follows: Headband 10, first ear bag 11, second ear bag 12, speaker 13, line conduction connection board 14, audio processing module 15, audio interface 16, headphone cable 17, first wiring interface 18, second wiring interface 19, host 20, power supply module 21, first additional function module 22, charging interface 23, auxiliary machine 30, second additional function module 31, wireless audio transceiver module 32, connecting line 40, electrical connection structure 50, universal serial bus plug 51, universal serial bus socket 52, magnet 53, conductive contact 54. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-10 In an embodiment of the present invention, a functional headset that realizes modular assembly and disassembly is provided, including a headband 10, a first ear bag 11 is provided at one end of the headband 10, and a second ear bag 12 is provided at the other end of the headband 10, the first ear bag 11 and the second ear bag 12 are both integrated with a line conduction connection board 14 and a speaker 13 electrically connected to the line conduction connection board 14, the headband 10 and the first ear bag 11 and the second ear bag 12 can adopt a traditional micro-adjustment structure in cooperation, so as to adapt to the use of different users, the speaker 13 is installed on the inner side of the ear bag, facing the user's ear when worn, and the audio processing module 15 is used to convert the voice digital signal into an analog signal, and play it through the speaker 13; The headband 10 also includes a main unit 20, an auxiliary unit 30 and a connecting line 40. An electrical connection structure 50 is provided between the main unit 20 and the first ear bag 11 and between the auxiliary unit 30 and the second ear bag 12. The main unit 20 and the first ear bag 11 and between the auxiliary unit 30 and the second ear bag 12 are detachably electrically connected through the electrical connection structure 50, and the line conduction connecting plate 14 is electrically connected to the electrical connection structure 50. The connecting line 40 is configured to electrically connect the main unit 20 and the auxiliary unit 30, or the connecting line 40 is configured to electrically connect the first ear bag 11 and the second ear bag 12. The connecting line 40 can be externally connected or embedded in the headband 10, so that the main unit 20, the auxiliary unit 30, the first ear bag 11 and the second ear bag 12 are electrically connected through the connecting line 40. The main unit 20 and the auxiliary unit 30 are generally designed with a symmetrical structure, which are distributed on the outer sides of the first ear bag 11 and the second ear bag 12, and the ear bag and the headband 10 connection structure which only have the basic function of the earphone are superimposed with more functions, which can achieve Bluetooth connection, wireless power supply or other additional functions. The detachable structure allows the main unit 20 and the auxiliary unit 30 to be disassembled for higher storage when not in use, and the main unit 20 and the auxiliary unit 30 of different design styles can be replaced according to user needs, or the structure of the ear bag and the headband 10 can be replaced, so as to achieve the purpose of replacing different types of speakers 13. In actual applications, for example, in some scenes where interaction is carried out through headphones, different types of main units 20 and auxiliary units 30 can be set by setting different sound channels, and different types of ear bags and headband 10 structures can be set according to the types of speakers 13, so that users can choose to match different headphones according to their needs or favorite styles, giving users a more flexible usage experience.

[0022] In the preferred scheme of this embodiment, the main machine 20 is integrated with a power supply module 21 and a first additional function module 22 electrically connected to the electrical connection structure 50, the auxiliary machine 30 is integrated with a second additional function module 31 electrically connected to the electrical connection structure 50, and the main machine 20 or the auxiliary machine 30 is also integrated with a wireless audio transceiver module 32 electrically connected to the electrical connection structure 50.

[0023] Generally, it is preferred to set a wireless audio transceiver module 32 in the auxiliary machine 30, so that when the main machine 20 is disassembled for charging and replaced with another main machine 20 for use, the wireless audio transceiver module 32 remains the original wireless audio transceiver module 32, so that there is no need to change the Bluetooth connection channel after replacing the power supply module 21.

[0024] Among them, the first additional function module 22 and the second additional function module 31 are set in a detachable and replaceable manner, which can provide customers with more additional function options when using the headphones. The first additional function module 22 and the second additional function module 31 can be lamp bead boards, which are electrically connected to the line conduction connection board 14 through the electrical connection structure 50. The lamp bead board can generate lighting effects synchronized with the broadcast according to the received voice digital signal, and can also control the light emission of the lamp bead board by setting a corresponding SOC module on the lamp bead board. The first additional function module 22 and the second additional function module 31 can also be electronic components that can generate other functions, such as external speakers, display screens, power-on action components, etc., which are set according to actual needs.

[0025] In the setting of the power supply part, a charging interface 23 is provided on the host 20, and the power supply module 21 is electrically connected to the charging interface 23; so that the power supply module 21 set in the host 20 can be charged, and the host 20 can also be charged in a disassembled state. In some cases where the earphones are urgently needed but the earphones are low on power, this effect can be achieved by replacing the host 20.

[0026] See also Figure 4 The first ear bag 11 or the second ear bag 12 is also provided with an audio interface 16 electrically connected to the line conduction connection board 14, and the audio interface 16 is connected to the headphone cable 17; when the main unit 20 and the auxiliary unit 30 are disassembled, the headphone can also be connected to the terminal product by wire through the headphone cable 17, so that the headphone can be connected by wireless Bluetooth as well as by wire, which brings more flexible usage to users.

[0027] Based on the electrical connection structure 50 provided between the main unit 20 and the first ear pack 11 and between the auxiliary unit 30 and the second ear pack 12, it is mainly capable of achieving two purposes of electrical connection and mechanical connection. In order to improve the firmness and reliability of the connection, other additional connection structures may also be provided between the main unit 20 and the first ear pack 11 and between the auxiliary unit 30 and the second ear pack 12 to achieve a reinforced connection. In terms of the provision of the electrical connection structure 50, the technical solution preferably adopts the following two implementations: [Electrical equipment connection structure embodiment 1] See also Figure 2The electrical connection structure 50 includes a universal serial bus plug 51 and a universal serial bus socket 52 that are connected to each other. The main unit 20 and the first ear pack 11, as well as the auxiliary unit 30 and the second ear pack 12, are mechanically and electrically connected through the connection of the universal serial bus plug 51 and the universal serial bus socket 52. Generally, a type-c connection plug and a type-c connection socket are selected, which have a mechanical connection structure with sufficient strength and can fully support the entire main unit 20 or the entire auxiliary unit 30 to ensure the firmness of the connection. The type-c connection plug and the type-c connection socket are easy to plug and unplug, so that users can quickly replace the main unit 20 or the auxiliary unit 30.

[0028] [Electrical equipment connection structure embodiment 2] See also Figure 3 The electrical connection structure 50 includes two groups of magnets 53 that are positioned and matched with each other and a plurality of conductive contacts 54 arranged on the magnets 53. The main unit 20 and the first ear bag 11 as well as the auxiliary unit 30 and the second ear bag 12 are mechanically connected by the magnetic attraction of the magnets 53, and the main unit 20 and the first ear bag 11 as well as the auxiliary unit 30 and the second ear bag 12 are electrically connected by the contact of the conductive contacts 54. The use of the magnets 53 for magnetic attraction will further improve the convenience of disassembly and assembly of the main unit 20 and the auxiliary unit 30.

[0029] Based on the connection mode of the connecting wire 40, it can mainly achieve the connection of the electronic components arranged in the first ear bag 11 and the second ear bag 12. In terms of the setting, the technical solution adopts the following three implementation modes for explanation: [Wiring Example 1] See also Figure 5-6, the connecting wire 40 is arranged inside the headband 10, and the two ends of the connecting wire 40 are respectively inserted into the first ear bag 11 and the second ear bag 12 along the inside of the headband 10 to be directly electrically connected to the line conduction connecting plate 14; this arrangement allows the user to use the headset without being disturbed by the connecting wire 40. Specifically, when the wireless audio transceiver module 32 is arranged in the auxiliary machine 30, and the connecting wire 40 adopts this arrangement, the connecting wire 40 has a wire for powering the second ear bag 12, a wire for providing an audio signal to the speaker 13 in the first ear bag 11 (a voice digital signal sent by the wireless audio transceiver module 32), and may have a wire for providing a control command signal to the first additional function module 22 (a control command signal sent by the wireless audio transceiver module 32). Of course, if the control of the first additional function module 22 is through If the control is performed by using data pre-stored in the line conduction connection board, the connection line 40 does not need to be provided with a conductor for providing a control command signal to the first additional function module 22. The electrical connection structure 50, corresponding to the electrical connection structure 50 between the first ear bag 11 and the host 20, needs to have a circuit for supplying power to the line conduction connection board 14 and the connection line 40 in the first ear bag 11, and a circuit for providing a control command signal to the first additional function module 22. The electrical connection structure 50 corresponding to the second ear bag 12 and the auxiliary machine 30 needs to have a circuit for supplying power to the second additional function module 31 and the wireless audio transceiver module 32, a circuit for providing an audio signal to the line conduction connection board in the first ear bag 11 and the second ear bag 12, and a circuit for providing a control command signal to the first additional function module 22 when necessary.

[0030] [Wiring Example 2] See also Figure 7-8 , the first ear bag 11 and the second ear bag 12 are both provided with a first wiring interface 18 connected to the line conduction connection board 14, and the two ends of the connecting line 40 are respectively connected to the first wiring interface 18 of the first ear bag 11 and the second ear bag 12. This setting enables the first ear bag 11 and the second ear bag 12 to be mutually connected and disconnected according to the user's own operation, that is, when some users use the headset, if they need to disconnect the first ear bag 11 or the second ear bag 12, they can directly achieve this purpose by unplugging the connecting line 40. In addition, if the headband 10 and the ear bag are assembled and fixed, if one of the ear bags is damaged and needs to be reworked and repaired, it is only necessary to replace the ear bag, so that it can achieve a more flexible modular setting; in addition, it can also make the connecting line 40 easy to replace. Specifically, when the wireless audio transceiver module 32 is set in the auxiliary machine 30, and the connecting line 40 adopts this setting, the setting of the wires in the connecting line 40 and the line setting of the electrical connection structure 50 are consistent with those in the wiring embodiment 1.

[0031] [Wiring Example 3] See also Figure 9-10 , a second wiring interface 19 is provided on both the main unit 20 and the auxiliary unit 30, and both ends of the connecting line 40 are respectively connected to the second wiring interfaces 19 of the main unit 20 and the auxiliary unit 30, and the electrical connection structure 50, the first function additional module 22, the second function additional module 31 and the wireless audio transceiver module 32 are all electrically connected to the second wiring interface 19; this connection method, in a larger sense, is to enable the main unit 20 and the auxiliary unit 30 to be used separately on the basis of being separated from the structure of the ear bag and the headband 10, that is, it involves the situation where the first additional function module and the second additional function module 31 are used separately, for example, the first additional function module 22 and the second additional function module 31 are a sound, and when connected to the ear bag and the headband 1 0, the sound is mainly broadcast by the speaker 13 arranged in the ear bag. When the main unit 20 and the auxiliary unit 30 are in the detachable state, they can be used as a traditional influence through the connection of the connecting line 40. The sound mainly plays the effect of multiple people enjoying the audio at the same time, such as the detachable speaker earphone described in the invention patent authorization announcement number CN207589108U; the first additional function module 22 and the second additional function module 31 can also be some energized action parts that can have a massage effect, etc. Therefore, by connecting the connecting line 40 to the main unit 20 and the auxiliary unit 30, the main unit 20 and the auxiliary unit 30 can be used separately without relying on the structure of the ear bag and the headband 10, so that the overall flexibility of the functional earphone is greatly improved; Specifically, in terms of wiring, the connecting line 40 adopts this setting mode, and the wireless audio transceiver module 32 is similarly set in the auxiliary machine 30, and the first additional function module 22 and the second additional function module 31 are not controlled by the line conduction connection board, but the first additional function module 22 and the second additional function module 31 can be controlled by themselves. For example, when the first additional function module 22 and the second additional function module 31 are affected, it is only necessary to connect the wireless audio transceiver module 32 and the power supply module 21. For example, the first additional function module 22 and the second additional function module 31 themselves are lamp bead boards, and the lamp bead board realizes only on-off control through the wireless audio transceiver module 32; in this case, the connecting line 40 has a wire for supplying power to the auxiliary machine 30, a wire for providing an audio signal to the speaker 13 of the first ear bag 11, and a wire for providing a corresponding command signal to the first additional function module 22 of the main machine 20. The electrical connection structure 50 is set to correspond to the electrical connection structure 50 between the first ear bag 11 and the main machine 20, and needs to have a circuit for supplying power to the speaker in the first ear bag 11, and a circuit for providing an audio signal to the speaker 13 in the first ear bag 11; the electrical connection structure 50 corresponding to the electrical connection structure 50 between the second ear bag 12 and the auxiliary machine 30 needs to have a circuit for supplying power to the speaker 13 in the second ear bag 12, and a circuit for providing an audio signal to the speaker 13 in the second ear bag 12.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A functional headset that can be modularly disassembled and assembled, comprising a headband, a first ear bag is arranged at one end of the headband, and a second ear bag is arranged at the other end of the headband, characterized in that: The first ear bag and the second ear bag are both integrated with a line conduction connection plate and a speaker electrically connected to the line conduction connection plate, and also include a main unit, an auxiliary unit and a connecting line. An electrical connection structure is provided between the main unit and the first ear bag, and between the auxiliary unit and the second ear bag. The main unit and the first ear bag, and between the auxiliary unit and the second ear bag are both detachably electrically connected through the electrical connection structure. The line conduction connection plate is electrically connected to the electrical connection structure. The connecting line is configured to electrically connect the main unit and the auxiliary unit, or the connecting line is configured to electrically connect the first ear bag and the second ear bag, so that the main unit, the auxiliary unit, the first ear bag and the second ear bag are electrically connected through the connecting line. Among them, the main machine is integrated with a power supply module and a first additional function module electrically connected to the electrical connection structure, the auxiliary machine is integrated with a second additional function module electrically connected to the electrical connection structure, and the main machine or the auxiliary machine is also integrated with a wireless audio transceiver module electrically connected to the electrical connection structure.

2. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The electrical connection structure includes a universal serial bus plug and a universal serial bus socket that are connected and matched with each other. The main unit and the first ear pack, as well as the auxiliary unit and the second ear pack, are mechanically and electrically connected through the connection of the universal serial bus plug and the universal serial bus socket.

3. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The electrical connection structure includes two groups of magnets that are positioned and matched with each other and a plurality of conductive contacts arranged on the magnets. The main unit and the first ear bag, as well as the auxiliary unit and the second ear bag, are mechanically connected by the magnetic attraction of the magnets, and the main unit and the first ear bag, as well as the auxiliary unit and the second ear bag are electrically connected by the contact of the conductive contacts.

4. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The first additional function module and the second additional function module are both lamp bead boards, and the lamp bead boards are electrically connected to the circuit conduction connection board through an electrical connection structure.

5. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The host is provided with a charging interface, and the power supply module is electrically connected to the charging interface.

6. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The first ear bag or the second ear bag is also provided with an audio interface electrically connected to the line conduction connection board, and the audio interface is connected to the headphone cable.

7. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The connecting wire is arranged inside the headband, and two ends of the connecting wire are respectively inserted into the first ear bag and the second ear bag along the inside of the headband to be directly electrically connected to the line conduction connecting plate.

8. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: The first ear bag and the second ear bag are both provided with a first wiring interface connected to the line conduction connection plate, and two ends of the connecting line are respectively connected to the first wiring interface of the first ear bag and the second ear bag.

9. The functional earphone capable of modular assembly and disassembly according to claim 1, characterized in that: A second wiring interface is provided on both the main unit and the auxiliary unit, and both ends of the connecting line are respectively connected to the second wiring ports of the main unit and the auxiliary unit, and the electrical connection structure, the first function additional module, the second function additional module and the wireless audio transceiver module are all electrically connected to the second wiring interface.

Images