One-dragging-four wireless microphone conference system capable of preventing receiving host from being lost

Abstract

The utility model discloses a one-dragging-four wireless microphone conference system capable of preventing a receiving host from being lost, which comprises a wireless microphone charging bin terminal and a plurality of wireless microphones capable of being placed in the wireless microphone charging bin terminal for charging. A charging bin LE Audio RX radio frequency module is designed in a wireless microphone charging bin terminal, and a microphone LE Audio RX radio frequency module is designed in a wireless microphone, so that when one or more wireless microphones are taken out from the wireless microphone charging bin terminal, the one or more wireless microphones are automatically connected with the wireless microphone charging bin terminal; the charging bin LE Audio RX radio frequency module and the microphone LE Audio RX radio frequency module form interconnection, and data communication can be carried out. When one or more wireless microphones are placed in the wireless microphone charging bin terminal, the wireless microphones can be charged, so that the wireless microphones can be used for a longer time with enough electric quantity next time. In this way, the charging bin is used as a receiving host, and the charging bin is more convenient to store and not prone to being lost after being used.

Description

Technical Field

[0001] The utility model relates to the technology in the field of electronic products, in particular to a 1-to-4 wireless microphone conference system for preventing a receiving host from being lost. Background Art

[0002] Video conferencing systems play an increasingly important role in daily office work. During a meeting, the conference system's camera can capture images of the venue and microphones can be used to capture sounds of the venue and send them to other venues via the network, greatly improving the efficiency of the meeting. In addition, various scenarios such as live performances and remote speeches can all be achieved through image and sound capture and transmission methods similar to the above.

[0003] Most of the current microphone systems use a receiving host and multiple wireless microphone slaves. The receiving host is interconnected with each wireless microphone slave, and then all wireless microphone slaves are transmitted to the computer through the receiving host to form a wireless cascade microphone system. This collective microphone system is convenient for multiple participants in larger conference rooms.

[0004] However, because a system has only one receiving host, and the receiving host is similar in appearance to a small U shield, it is small in size and needs to be plugged in and out of the computer each time it is used, resulting in the disadvantage of being easily lost during use and storage. Utility Model Content

[0005] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a 1-to-4 wireless microphone conference system that can prevent the receiving host from being lost. A charging compartment with a receiving function is designed, and the receiving host is integrated into the charging compartment so that the charging compartment can realize the receiving function and reduce the possibility of losing the receiving host.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A 1-to-4 wireless microphone conference system for preventing a receiving host from being lost comprises a wireless microphone charging compartment terminal and a plurality of wireless microphones that can be placed in the wireless microphone charging compartment terminal for charging.

[0008] The wireless microphone charging terminal includes a charging compartment lithium battery, a charging compartment lithium battery protection circuit, a charging compartment battery charging circuit, a USB interface, a DC-DC boost circuit, an output interface circuit and a charging compartment LE Audio RX radio frequency module. The charging compartment lithium battery is electrically connected to the charging compartment lithium battery protection circuit, the charging compartment battery charging circuit and the USB interface in sequence. The USB interface is electrically connected to the charging compartment LE Audio RX radio frequency module, and the output of the charging compartment lithium battery protection circuit is electrically connected to the DC-DC boost circuit and then connected to the output interface circuit.

[0009] Multiple wireless microphones all include a charging compartment interface, a microphone battery charging circuit, a microphone lithium battery protection circuit, and a microphone lithium battery that are electrically connected in sequence. The microphone battery charging circuit is also connected to a microphone LE Audio RX radio frequency module, a sound collection circuit, and a microphone pickup unit.

[0010] As a preferred solution, the charging compartment LE Audio RX RF module and the microphone LE Audio RX RF module are FSC-BT631D modules.

[0011] As a preferred solution, the wireless microphone charging compartment terminal is equipped with four wireless microphones, namely a first wireless microphone, a second wireless microphone, a third wireless microphone, and a fourth wireless microphone. When the wireless microphone charging compartment terminal charges one or more of the wireless microphones, the charging compartment interface is electrically connected to the output interface circuit.

[0012] As a preferred solution, the charging compartment lithium battery is a polymer lithium-ion battery.

[0013] As a preferred solution, the charging circuit of the charging compartment battery includes a precision adjustable voltage stabilization circuit, an adjustable constant current circuit and a charging indication circuit.

[0014] As a preferred solution, the USB interface is a USB plug or a USB female plug for connecting a USB cable to a computer or a mobile phone.

[0015] As a preferred solution, the DC-DC boost circuit is an inductive DC-DC converter circuit.

[0016] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that by designing a charging bin LE Audio RX RF module in the wireless microphone charging bin terminal and designing a microphone LE Audio RX RF module in the wireless microphone, when one or more wireless microphones are taken out of the wireless microphone charging bin terminal, the one or more wireless microphones are automatically interconnected with the wireless microphone charging bin terminal through the charging bin LE Audio RX RF module and the microphone LE AudioRX RF module, and data communication can be performed. When one or more wireless microphones are placed in the wireless microphone charging bin terminal, they can be charged so that there is enough power to use for a longer time next time. In this way, the charging bin is used as a receiving host, which is more convenient to store after use and not easy to lose.

[0017] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a circuit structure diagram of a 1-to-4 wireless microphone conference system according to an embodiment of the utility model.

[0019] Figure 2 This is a block diagram of the circuit structure of the wireless microphone charging compartment terminal of an embodiment of the present utility model.

[0020] Figure 3 This is a protection circuit diagram of a lithium battery in a charging bin according to an embodiment of the present utility model.

[0021] Figure 4 It is a circuit diagram of a battery charging compartment in an embodiment of the utility model.

[0022] Figure 5 It is a DC-DC boost circuit diagram of an embodiment of the utility model.

[0023] Figure 6 It is a block diagram of the circuit structure of any wireless microphone of the embodiments of the present utility model.

[0024] Figure 7 It is a structural diagram of a 1-to-4 wireless microphone conference system according to an embodiment of the present utility model.

[0025] Figure 8 This is an exploded view of a 1-to-4 wireless microphone conference system according to an embodiment of the present utility model.

[0026] Description of the accompanying drawings:

[0027] 10. Wireless microphone charging terminal 11. Charging compartment lithium battery

[0028] 12. Charging compartment lithium battery protection circuit 13. Charging compartment battery charging circuit

[0029] 14. USB interface 15. DC-DC boost circuit

[0030] 16. Output interface circuit 17. Charging compartment LE Audio RX RF module

[0031] 20. Wireless microphone 201. First wireless microphone

[0032] 202, second wireless microphone 203, third wireless microphone

[0033] 204. Fourth wireless microphone 21 charging compartment interface

[0034] 22. Microphone battery charging circuit 23. Microphone lithium battery protection circuit

[0035] 24. Microphone lithium battery 25. Microphone LE Audio RX RF module

[0036] 26. Sound collection circuit 27. Microphone pickup unit. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0042] Please refer to Figure 1 As shown, it shows the specific structure of the preferred embodiment of the utility model, which is a 1-to-4 wireless microphone conference system that prevents the receiving host from being lost, including a wireless microphone charging compartment terminal 10 and four wireless microphones 20 that can be placed in the wireless microphone charging compartment terminal 10 for charging, namely a first wireless microphone 201, a second wireless microphone 202, a third wireless microphone 203, and a fourth wireless microphone 204.

[0043] Since there are four wireless microphones 20 in the whole system, when one or more wireless microphones 20 are taken out from the wireless microphone charging compartment terminal 10, the one or more wireless microphones 20 are automatically interconnected with the wireless microphone charging compartment terminal 10 for data communication. When one or more wireless microphones 20 are placed in the wireless microphone charging compartment terminal 10, they can be charged so that there is enough power to use them for a longer time next time.

[0044] Figure 2 It is a circuit block diagram of the wireless microphone charging compartment terminal 10, which includes a charging compartment lithium battery 11, a charging compartment lithium battery protection circuit 12, a charging compartment battery charging circuit 13, a USB interface 14, a DC-DC boost circuit 15, an output interface circuit 16 and a charging compartment LE Audio RX radio frequency module 17. Among them, the charging compartment lithium battery 11 is electrically connected to the charging compartment lithium battery protection circuit 12, the charging compartment battery charging circuit 13, and the USB interface 14 in sequence, the USB interface 14 is electrically connected to the charging compartment LE AudioRX radio frequency module 17, and the output of the charging compartment lithium battery protection circuit 12 is electrically connected to the DC-DC boost circuit 15 and then connected to the output interface circuit 16.

[0045] More specifically, the charging compartment lithium battery 11 is a polymer lithium-ion battery, which is usually rectangular in shape. The battery interior adopts a spiral winding structure, and a very fine and highly permeable polyethylene film isolation material is used to separate the positive and negative electrodes. The battery is filled with an organic electrolyte solution. In addition, a safety valve and a PTC element are installed to protect the battery from damage when the battery is in an abnormal state or when the output is short-circuited. In general, a charging compartment lithium battery 11 with a capacity of 600mAh can be selected, and a full charge can fully charge 4 wireless microphones 20 for about 6 times.

[0046] The charging compartment lithium battery protection circuit 12 can prevent overcurrent and overvoltage during charging and discharging. Figure 3As shown, it consists of two field effect tubes and a charge and discharge protection chip S-8232. The overcharge control tube FET2 and the overdischarge control tube FET1 are connected in series in the circuit. The protection IC charge and discharge protection chip monitors and controls the battery voltage. When the battery voltage rises to 4.2V, the overcharge protection tube FET1 is turned off and charging stops. To prevent malfunction, a delay capacitor is generally added to the external circuit. When the battery is in a discharge state and the battery voltage drops to 2.55V, the overdischarge control tube FET1 is turned off and stops supplying power to the load. Overcurrent protection is to control the overdischarge control tube FET1 to cut off and stop discharging to the load when a large current flows through the load, in order to protect the battery and the field effect tube. Overcurrent detection uses the on-resistance of the field effect tube as a detection resistor to monitor its voltage drop, and stops discharging when the voltage drop exceeds the set value. A delay circuit is generally added to the circuit to distinguish between surge current and short-circuit current. The charging warehouse lithium battery protection circuit 12 has complete functions and reliable performance.

[0047] In one embodiment, the charging compartment battery charging circuit 13 can refer to Figure 4 As shown, the principle of the battery charging circuit 13 of the charging warehouse is to charge the battery with a constant voltage to ensure that it will not be overcharged. The input DC voltage is 3 volts higher than the voltage of the charged battery. Resistor R1, transistor Q1, variable resistor W1, and control diode TL431 form a precision adjustable voltage stabilization circuit, transistor Q2, variable resistor W2, and resistor R2 form an adjustable constant current circuit, and transistor Q3, resistor R3, resistor R4, resistor R5, and light-emitting device LED are charging indication circuits. As the voltage of the charged battery rises, the charging current will gradually decrease. After the battery is fully charged, the voltage drop on resistor R4 will decrease, so that the transistor Q3 is cut off and the light-emitting device LED will go out. When in use, install a suitable heat sink on transistors Q2 and Q3. The advantages of this circuit are: simple to make, easy to purchase components, safe charging, intuitive display, and no damage to the battery. By changing the variable resistor W1, multiple series charging warehouse lithium batteries 11 can be charged, and changing the variable resistor W2 can adjust the charging current over a wide range.

[0048] The USB interface 14 can be a USB plug directly provided on the wireless microphone charging terminal 10, or it can be a USB female connector connected to a computer or a mobile phone via a USB cable.

[0049] The utility model is provided with a charging compartment LE Audio RX radio frequency module 17, which is electrically connected to each wireless microphone 20 through the charging compartment LE Audio RX radio frequency module 17. The charging compartment LE Audio RX radio frequency module 17 is a new generation of Bluetooth audio. As the industry transitions from Bluetooth classic audio to low-power audio, the charging compartment LE Audio RX radio frequency module 17 supports both versions and improves sound quality, power consumption, latency and bandwidth performance. In a preferred embodiment, the FSC-BT631D module of Shenzhen Feiyitong Technology Co., Ltd. can be used, and the wireless microphone charging compartment terminal 10 with transceiver function can be used to connect to a sound source device such as a smartphone, laptop or TV, and then use Auracast broadcast audio to transmit the audio content to an unlimited number of other wireless microphones 20.

[0050] The nRF5340 SoC in the FSC-BT631D module has dual processors, one of which is a high-performance application processor with support for DSP and floating-point operations (FP), and a fully programmable ultra-low-power network processor. Its application core manages both the LE Audio codec and the Bluetooth Classic audio codec, while the network processor handles the low-power Bluetooth protocol. The nRF5340 SoC's 2.4GHz multiprotocol radio enables LE Audio connectivity with 3dBm output power and -98dBm RX sensitivity, for a link budget of 101dBm. The radio also supports other major RF protocols, including Bluetooth 5.3, Bluetooth direction finding, long range, Bluetooth mesh, Thread, Zigbee, and ANT TM .

[0051] The DC-DC boost circuit 15 can be implemented as follows: Figure 5 In the inductor type DC-DC converter circuit shown, closing the switch SW causes the current through the inductor L1 to increase. Opening the switch SW causes the current to flow to the output capacitor C4 through the diode D1. Due to the storage of the current from the inductor, the voltage of the output capacitor increases after multiple switching cycles, resulting in an output voltage higher than the input voltage. As a result, the voltage of the output interface circuit 16 is higher than the supply voltage of the battery, thereby charging each wireless microphone 20 with a higher voltage.

[0052] like Figure 6 As shown, the circuit block diagram structure of the four wireless microphones 20 is the same, including a charging compartment interface 21, a microphone battery charging circuit, a microphone lithium battery protection circuit 23, a microphone lithium battery 24, a microphone LE Audio RX radio frequency module 25, a sound collection circuit 26, and a microphone pickup unit 27.

[0053] The charging compartment interface 21 takes power from the output interface, and then connects to the microphone lithium battery 24 through the microphone battery charging circuit 22 and the microphone lithium battery protection circuit 23 electrically connected to the charging compartment interface 21, thereby charging the microphone lithium battery 24 in each wireless microphone 20. When not charging, the microphone lithium battery 24 is discharged, and the microphone LE Audio RX radio frequency module 25 and the microphone electrically connected to the microphone lithium battery protection circuit 23 are powered to form recording and wireless Bluetooth connection communication, so that the microphone LE Audio RX radio frequency module 25 of each wireless microphone 20 can be connected to the charging compartment LE Audio RX radio frequency module 17 of the wireless microphone charging compartment terminal 10. In addition, the microphone pickup unit 27 picks up the audio of the conference participants, converts the physical signal into a digital signal through the sound collection circuit 26, and finally uploads it to the wireless microphone charging compartment terminal 10 through the microphone LE Audio RX radio frequency module 25 and the charging compartment LE Audio RX radio frequency module 17, and then uploads it to terminal devices such as computers, notebooks, and smart phones by the wireless microphone charging compartment terminal 10.

[0054] Application Examples

[0055] like Figure 7 and Figure 8 As shown, there are 4 wireless microphones 20 in the whole set of 1-to-4 wireless microphone conference system to prevent the receiving host from being lost. When one or more of the first wireless microphone 201, the second wireless microphone 202, the third wireless microphone 203, and the fourth wireless microphone 204 are taken out from the wireless microphone charging compartment terminal 10, the one or more wireless microphones 20 are automatically interconnected with the wireless microphone charging compartment terminal 10 to perform data communication. When one or more wireless microphones 20 are placed in the wireless microphone charging compartment terminal 10, they can be charged so that there is enough power to use for a longer time next time.

[0056] The working principle of the utility model is: the wireless microphone 20 collects external sound signals, which are processed by the sound collection circuit 26 and then wirelessly transmitted to the charging compartment terminal through LE-Audio encoding; the charging compartment terminal receives the data transmitted by the wireless microphone 20, and after LE-Audio decoding, it is transmitted to the computer or mobile phone through the UAC protocol.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A 1-to-4 wireless microphone conference system for preventing the receiving host from being lost, comprising a wireless microphone charging compartment terminal (10) and a plurality of wireless microphones (20) that can be placed in the wireless microphone charging compartment terminal (10) for charging, characterized in that: The wireless microphone charging terminal (10) comprises a charging compartment lithium battery (11), a charging compartment lithium battery protection circuit (12), a charging compartment battery charging circuit (13), a USB interface (14), a DC-DC boost circuit (15), an output interface circuit (16) and a charging compartment LE Audio RX radio frequency module (17), wherein the charging compartment lithium battery (11) is electrically connected to the charging compartment lithium battery protection circuit (12), the charging compartment battery charging circuit (13) and the USB interface (14) in sequence, the USB interface (14) is electrically connected to the charging compartment LE Audio RX radio frequency module (17), and the output of the charging compartment lithium battery protection circuit (12) is electrically connected to the DC-DC boost circuit (15) and then connected to the output interface circuit (16); The plurality of wireless microphones (20) each comprises a charging compartment interface (21), a microphone battery charging circuit (22), a microphone lithium battery protection circuit (23), and a microphone lithium battery (24) which are electrically connected in sequence; the microphone battery charging circuit (22) is also connected to a microphone LE Audio RX radio frequency module (25), a sound collection circuit (26), and a microphone pickup unit (27).

2. According to claim 1, a 1-to-4 wireless microphone conference system for preventing the loss of the receiving host, characterized in that: The charging compartment LE Audio RX radio frequency module (17) and the microphone LE Audio RX radio frequency module (25) are FSC-BT631D modules.

3. The 1-to-4 wireless microphone conference system for preventing the loss of the receiving host according to claim 1 is characterized by: The wireless microphone charging compartment terminal (10) is provided with four wireless microphones (20), namely a first wireless microphone (201), a second wireless microphone (202), a third wireless microphone (203), and a fourth wireless microphone (204). When the wireless microphone charging compartment terminal (10) charges one or more of the wireless microphones (20), the charging compartment interface (21) is electrically connected to the output interface circuit (16).

4. The 1-to-4 wireless microphone conference system for preventing the loss of the receiving host according to claim 1 is characterized in that: The charging compartment lithium battery (11) is a polymer lithium ion battery.

5. The 1-to-4 wireless microphone conference system for preventing the loss of the receiving host according to claim 1 is characterized in that: The charging compartment battery charging circuit (13) comprises a precise adjustable voltage stabilization circuit, an adjustable constant current circuit and a charging indication circuit.

6. The 1-to-4 wireless microphone conference system for preventing the loss of the receiving host according to claim 1, characterized in that: The USB interface (14) is a USB plug or a USB female plug for connecting a USB cable to a computer or a mobile phone.

7. The 1-to-4 wireless microphone conference system for preventing the loss of the receiving host according to claim 1, characterized in that: The DC-DC boost circuit (15) is an inductive DC-DC converter circuit.

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