阅读说明：本技术 一种全自动无线扩音装置 (Full-automatic wireless public address set ) 是由 王元光 任庆辉 姚宗栋 于 2021-07-09 设计创作，主要内容包括：一种全自动无线扩音装置,属于扩音装置技术领域,目的在于解决现有无线扩音装置需要频繁开关机、充电、调整等复杂繁琐操作的技术问题,提供一种使用便捷的全自动无线扩音装置。本发明装置包括无线接收器、无线发射器。无线发射器包括麦克风、调制/发射电路、发射天线、待机/工作检测电路、充/放电控制电路、蓄电池、充电输入接口。无线接收器包括接收天线、解调/功放电路、扬声器、充电输出检测电路、AC/DC电源、定时控制电路、充电输出接口。本发明无线接收器的充电输出接口与无线发射器的充电输入接口为机械、电气参数均相匹配的有线磁吸式或无线电磁感应式充电接口。本发明可以实现装置自动开关机、自动充电等功能,使用非常便捷。(The utility model provides a full-automatic wireless public address set, belongs to public address set technical field, and aim at solves the technical problem that current wireless public address set needs complicated loaded down with trivial details operations such as frequent switch on and off, charges, adjustment, provides a use convenient full-automatic wireless public address set. The device comprises a wireless receiver and a wireless transmitter. The wireless transmitter comprises a microphone, a modulation/transmission circuit, a transmission antenna, a standby/work detection circuit, a charging/discharging control circuit, a storage battery and a charging input interface. The wireless receiver comprises a receiving antenna, a demodulation/power amplification circuit, a loudspeaker, a charging output detection circuit, an AC/DC power supply, a timing control circuit and a charging output interface. The charging output interface of the wireless receiver and the charging input interface of the wireless transmitter are wired magnetic suction type or wireless electromagnetic induction type charging interfaces with mechanical and electrical parameters matched. The invention can realize the functions of automatic startup and shutdown, automatic charging and the like of the device, and is very convenient to use.)

1. A full-automatic wireless public address set, including wireless transmitter and wireless receiver, characterized by:

the wireless transmitter comprises a microphone, a modulation/transmitting circuit, a transmitting antenna, a standby/working detection circuit, a charge and discharge control circuit, a storage battery and a charge input interface;

the wireless receiver comprises a receiving antenna, a demodulation/power amplification circuit, a loudspeaker, a charging output detection circuit, an AC/DC power supply, a timing control circuit and a charging output interface;

the input end and the output end of a modulation/transmission circuit of the wireless transmitter are respectively connected with the microphone and the transmitting antenna; the output end of the standby/working detection circuit is connected with the power end of the modulation/transmission circuit, and when the charging input interface and the charging output interface of the wireless receiver are detected to be in a connected/disconnected state, the modulation/transmission circuit is controlled to enter a standby/working state; the charging/discharging control circuit is respectively connected with the standby/working detection circuit, the storage battery and the charging input interface, the storage battery is charged through the charging input interface when the wireless transmitter is in a standby state, and the modulation/transmission circuit is powered through the standby/working detection circuit by using electric energy stored in the storage battery when the wireless transmitter is in a working state;

the input end and the output end of a demodulation/power amplification circuit of the wireless receiver are respectively connected with the receiving antenna and the loudspeaker; the output end of the charging output detection circuit is connected with the power end of the demodulation/power amplification circuit, and when the charging output interface is detected to be in a connection/disconnection state with the charging input interface of the wireless transmitter, the demodulation/power amplification circuit is controlled to enter a standby/working state; the AC/DC power supply output end is respectively connected with the charging output detection circuit and the charging output interface, the demodulation/power amplification circuit is powered through the charging output detection circuit, and the wireless transmitter is provided with a charging power supply through the charging output interface; the input end and the output end of the timing control circuit are respectively connected with the external 220V/AC power supply and the input end of the AC/DC power supply, and the AC/DC power supply is controlled to be turned on and turned off according to the set on-off time.

2. The fully automatic wireless audio amplifier as claimed in claim 1, wherein the charging output interface of the wireless receiver and the charging input interface of the wireless transmitter are a thimble-type magnetic-attraction charging socket, a contact-type magnetic-attraction charging plug, a wireless electromagnetic induction transmitting circuit, and a wireless electromagnetic induction receiving circuit, which are mechanically and electrically matched.

3. A fully automatic wireless audio amplifier as claimed in claim 1, wherein the standby/operation detection circuit of the wireless transmitter comprises a power management chip/transistor and a mercury switch/reed switch/photoelectric switch connected to the state detection input terminal thereof, the mercury switch/reed switch/photoelectric switch is operated by/without the action of gravity/magnetic force/shielding when the charging input interface of the wireless transmitter is connected/disconnected with the charging output interface of the wireless receiver, and the power management chip/transistor is triggered to control the wireless transmitter to be in the standby/operation state.

4. A full-automatic wireless microphone device as claimed in claim 1, wherein the charging output detection circuit of the wireless receiver comprises a micro switch or a power management chip/transistor and a micro switch/reed switch/photoelectric switch connected to the state detection input terminal thereof; the micro switch/reed switch/photoelectric switch is acted by or not under the action of gravity/magnetic force/shielding when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and directly or triggers the power management chip/transistor to control the wireless receiver to be in a standby/working state.

Technical Field

The present invention relates to a speaker, and more particularly, to a wireless speaker.

Background

The existing wireless sound amplifying device does not unify the power supply of the wireless transmitter and the wireless receiver, the charging, the operation functions of the on-off and the like, the coordination and the whole design, the power supply of the wireless transmitter and the wireless receiver, the charging, the on-off and the like are relatively independent, the user is required to respectively operate the wireless transmitter and the wireless receiver, the labor intensity of the user is increased in multiples, especially, teachers have high frequency in class and the like, the wireless transmitter and the wireless receiver need frequent on-off and the like under a high-intensity use environment, the adjustment, the plug-in and-out plug, the charging and the like, the actual use process of the user is very complicated, and the use experience is greatly reduced.

Disclosure of Invention

The invention aims to solve the technical problem that the existing wireless sound amplifying device is complicated to operate and use, and provides a full-automatic wireless sound amplifying device convenient to operate and use.

The invention relates to a full-automatic wireless sound amplification device which comprises a wireless transmitter and a wireless receiver.

The wireless transmitter comprises a microphone, a modulation/transmission circuit, a transmission antenna, a standby/work detection circuit, a charging/discharging control circuit, a storage battery and a charging input interface.

The wireless receiver comprises a receiving antenna, a demodulation/power amplification circuit, a loudspeaker, a charging output detection circuit, an AC/DC power supply, a timing control circuit and a charging output interface.

The input and output ends of the wireless transmitter modulation/transmission circuit are respectively connected with the microphone and the transmitting antenna. The output end of the standby/working detection circuit is connected with the power supply end of the modulation/transmission circuit, and when the charging input interface and the charging output interface of the wireless receiver are detected to be in a connected/disconnected state, the modulation/transmission circuit is controlled to enter a standby/working state. The charging/discharging control circuit is respectively connected with the standby/working detection circuit, the storage battery and the charging input interface, the storage battery is charged through the charging input interface when the wireless transmitter is in a standby state, and the modulation/transmission circuit is powered by electric energy stored in the storage battery through the standby/working detection circuit when the wireless transmitter is in a working state.

The input and output ends of the wireless receiver demodulation/power amplification circuit are respectively connected with the receiving antenna and the loudspeaker. The output end of the charging output detection circuit is connected with the power end of the demodulation/power amplification circuit, and when the charging output interface is detected to be in a connection/disconnection state with the charging input interface of the wireless transmitter, the demodulation/power amplification circuit is controlled to enter a standby/working state. The AC/DC power output end is respectively connected with the charging output detection circuit and the charging output interface, the demodulation/power amplification circuit is powered through the charging output detection circuit, and the wireless transmitter is provided with a charging power supply through the charging output interface. The input end and the output end of the timing control circuit are respectively connected with the external 220V/AC power supply and the input end of the AC/DC power supply, and the AC/DC power supply is controlled to be turned on and turned off according to the set on-off time.

The charging output interface of the wireless receiver and the charging input interface of the wireless transmitter in the full-automatic wireless sound amplifying device are a thimble type magnetic suction charging socket, a contact type magnetic suction charging plug or a wireless electromagnetic induction transmitting circuit and an electromagnetic induction receiving circuit which are matched in mechanical and electrical parameters. The thimble type magnetism is inhaled charging socket, contact type magnetism and is inhaled charging plug can be automatic actuation under magnetic force to realize wireless transmitter device's automatic fixation, utilize the metal thimble and the metal contact of in close contact with under the effect of magnetic actuation to realize wireless transmitter and wireless receiver charging line's automatic connection simultaneously. The wireless electromagnetic induction transmitting circuit and the electromagnetic induction receiving circuit realize the automatic attraction of the wireless transmitter and the wireless receiver by utilizing the magnetic action of the fixed magnets respectively correspondingly arranged on the wireless transmitter and the wireless receiver body so as to realize the automatic fixation of the wireless transmitter device and the automatic alignment and the attachment of the wireless charging transmitting and receiving coil.

The standby/working detection circuit of the wireless transmitter comprises a power management chip/transistor and a mercury switch/reed switch/photoelectric switch connected with the state detection input end of the power management chip/transistor. The mercury switch/reed switch/photoelectric switch is acted by/without the action of gravity/magnetic force/shielding when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and triggers the power management chip/transistor to control the wireless transmitter to be in a standby/working state. In the technical scheme of taking the mercury switch as the state detection switch, the device angle when the wireless transmitter normally works can be designed to be 90 degrees vertical to the microphone in the vertical direction; the device angle at the time of charging standby of the wireless transmitter is designed to be 0 ° horizontally of the microphone. The mercury ball in the mercury switch of the device with the proper angle in the wireless transmitter is respectively positioned at different positions under the action of gravity, two contacts of the mercury switch are in short circuit or disconnected, and the power management chip/transistor judges whether the wireless transmitter is in a working state or a standby state by detecting the states of the mercury switch in short circuit and disconnected respectively under two different angle states. In the technical scheme of using the reed switch as the state detection switch, the reed switch is arranged at the corresponding position on the wireless transmitter corresponding to the body of the wireless receiver after the charging output interface of the wireless receiver is connected with the charging input interface of the wireless transmitter, and a magnet is arranged at the position on the wireless receiver corresponding to the reed switch. The reed switch is acted by/without magnetic force when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and triggers the power management chip/transistor to control the wireless transmitter to be in a standby/working state. In the technical scheme of using the photoelectric switch as the state detection switch, the photoelectric switch is arranged at a corresponding position on the wireless transmitter corresponding to the body of the wireless receiver after the charging output interface of the wireless receiver is connected with the charging input interface of the wireless transmitter. The photoelectric switch is under the shielding action of the wireless receiver when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and the photoelectric switch triggers the power management chip/transistor to control the wireless transmitter to be in a standby/working state.

The charging output detection circuit of the wireless receiver comprises a microswitch or a power management chip/transistor and a microswitch/reed switch/photoelectric switch connected with the state detection input end of the microswitch/reed switch/photoelectric switch. The micro switch/reed switch/photoelectric switch is acted by or not under the action of gravity/magnetic force/shielding when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and directly or triggers the power management chip/transistor to control the wireless receiver to be in a standby/working state. In the technical scheme of using the microswitch as the state detection switch, an action part of the microswitch is mechanically coupled with a charging output interface, two electric contacts of the microswitch are directly connected in series in a power supply circuit of a modulation/transmission circuit, or one end of the microswitch is grounded, and the other end of the microswitch is connected to the state detection input end of a power management chip/transistor. When the charging output interface of the wireless receiver is connected with the charging input interface of the wireless transmitter, the microswitch acts under the action of the pressure of the wireless transmitter device, and directly cuts off the power supply of the demodulation/power amplification circuit or triggers the power management chip/transistor to control the modulation/transmission circuit to be converted into a standby state. In the technical scheme of using the reed switch as the state detection switch, the reed switch is arranged at the corresponding position on the wireless receiver corresponding to the body of the wireless transmitter after the charging output interface of the wireless receiver is connected with the charging input interface of the wireless transmitter, and a magnet is arranged at the position on the wireless transmitter corresponding to the reed switch. The reed switch is acted by/without magnetic force when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected/disconnected state, and triggers the power management chip/transistor to control the wireless receiver to be in a standby/working state. In the technical scheme of using the photoelectric switch as the state detection switch, the photoelectric switch is arranged at a corresponding position on the wireless receiver corresponding to the body of the wireless transmitter after the charging output interface of the wireless receiver is connected with the charging input interface of the wireless transmitter. The photoelectric switch is under the shielding action of the wireless transmitter or not under the shielding action of the wireless transmitter when the charging input interface of the wireless transmitter and the charging output interface of the wireless receiver are in a connected or non-connected state, and triggers the power management chip/transistor to control the wireless receiver to be in a standby or working state.

The invention has the beneficial effects that:

the functions of power supply, power on and power off and the like of the wireless transmitter and the wireless receiver of the full-automatic wireless sound amplifying device are uniformly coordinated, high-degree automatic operation is realized, the manual operation tasks of power on and power off, charging and the like of the wireless transmitter and the wireless receiver which are frequently required in daily life are automatically completed by the internal circuit, the workload of manual operation is greatly reduced, the complicated daily operation is avoided, and the conditions of influence on use and the like caused by forgetting to charge are avoided. Can effectual solution current wireless public address set technical problem such as complex operation, have beneficial technological effect such as convenient use.

Drawings

Fig. 1 is a schematic diagram of the circuit principle of the present invention.

Fig. 2(a) and fig. 2(B) are schematic diagrams of an operating principle of an embodiment of the present invention.

Fig. 3(a) and fig. 3(B) are schematic diagrams illustrating the operation principle of the charging output detection circuit of the wireless receiver and the standby/operation detection circuit of the wireless transmitter according to the first embodiment of the present invention.

Fig. 4(a) and 4(B) are schematic diagrams of the working principle of the second embodiment of the invention.

Fig. 5(a) and 5(B) are schematic diagrams illustrating the operation principle of the charging output detection circuit of the wireless receiver and the standby/operation detection circuit of the wireless transmitter according to the second embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the circuit principle of the present invention.

Comprises 1 wireless transmitter 1 and 1 wireless receiver 2.

The circuit of the wireless transmitter 1 comprises a microphone 11, a modulation/transmission circuit 12, a transmission antenna 13, a standby/work detection circuit 14, a charging and discharging control circuit 15, a storage battery 16 and a charging input interface 17.

The partial circuit of the wireless receiver 2 comprises a receiving antenna 21, a demodulation/power amplification circuit 22, a loudspeaker 23, a charging output detection circuit 24, an AC/DC power supply 25, a timing control circuit 26 and a charging output interface 27.

The input end and the output end of a modulation/transmission circuit 12 of the wireless transmitter 1 are respectively connected with the microphone 11 and the transmitting antenna 13, so that an external sound signal picked up by the microphone 11 is converted into a radio frequency electromagnetic signal which is transmitted to an external space through the transmitting antenna 13; the output end of the standby/working detection circuit 14 is connected with the power supply end of the modulation/transmission circuit 12, and when the charging input interface 17 of the wireless transmitter 1 and the charging output interface 27 of the wireless receiver 2 are detected to be in a connection/disconnection state, the modulation/transmission circuit 12 is controlled to enter a standby/working state; the charge/discharge control circuit 15 is respectively connected with the standby/working detection circuit 14, the storage battery 16 and the charging input interface 17, the storage battery 16 is charged through the charging input interface 17 when the wireless transmitter 1 is in a standby state, and the modulation/transmission circuit 12 is powered by the electric energy stored in the storage battery 16 through the standby/working detection circuit 14 when the wireless transmitter 1 is in a working state.

The input and output ends of the demodulation/power amplification circuit 22 of the wireless receiver 2 are respectively connected with the receiving antenna 17 and the loudspeaker 23, and the high-frequency electromagnetic signals which are received by the receiving antenna 17 and transmitted by the wireless transmitter 1 and contain sound information are converted into audio electrical signals which are radiated to the outside through the loudspeaker 23 and are restored into sound signals. The charging output detection circuit 24 is connected with the power end of the demodulation/power amplification circuit 22, and controls the demodulation/power amplification circuit 22 to enter a standby/working state when detecting that the charging output interface 27 is in a connection/disconnection state with the charging input interface 17 of the wireless transmitter 1; the output end of the AC/DC power supply 25 is respectively connected with the charging output detection circuit 24 and the charging output interface 27, the demodulation/power amplification circuit 22 is supplied with power through the charging output detection circuit 24, and the wireless transmitter 1 is supplied with charging power through the charging output interface 27; the input end and the output end of the timing control circuit 26 are respectively connected with the external 220V/AC power supply and the input end of the AC/DC power supply 25, and the AC/DC power supply 25 is controlled to be turned on and off according to the set on-off time.

Fig. 2(a) and fig. 2(B) are schematic diagrams of an operating principle of an embodiment of the present invention.

Fig. 3(a) and fig. 3(B) are schematic diagrams illustrating the operation principle of the charging output detection circuit 24 of the wireless receiver 2 and the standby/operation detection circuit 14 of the wireless transmitter 1 according to the embodiment of the present invention.

As shown in fig. 2(a) and fig. 3(B), the standby/operation detection circuit 14 of the wireless transmitter 1 of the present embodiment includes a state detection mercury switch 141 and a power management chip 142; the state detection mercury switch 141 is connected with the state detection input end of the power management chip 142; when the wireless transmitter 1 is at the horizontal/vertical angle, the state detection mercury switch 141 is turned off/on, and the trigger power management chip 142 controls the wireless transmitter 1 to be in the standby/operating state. Since the present solution is automatically controlled by detecting that the device is at different horizontal/vertical angles when the wireless transmitter 1 is in the standby/operating state, it is considered that the wireless transmitter 1 may enter the standby state due to the angle being in the horizontal state for a short time when the wireless transmitter 1 is in the operating state, also due to the accidental stooping or the like of the wearer. In order to avoid the above accidental factors from affecting the normal and stable operation of the wireless transmitter 1, the running program inside the power management chip 142 needs to perform a proper time-delay execution program processing when the state detection input end inputs the standby signal, and if the running program is applied in a special situation that the body posture of a dance instructor is frequently in an abnormal standing state, the time delay of the time-delay execution program should be properly prolonged.

In order to avoid that the body posture of a wearer such as a dance instructor often needs to be in an abnormal standing state to affect the normal and stable work of the wireless transmitter 1, the standby/work detection circuit 14 of the wireless transmitter 1 of this embodiment may also adopt a reed switch/photoelectric switch as a state detection switch depending on whether the wireless transmitter 1 is close to the wireless receiver 2 or not and whether the wireless transmitter is in a connection charging state or not. When the reed switch is used as the state detection switch, the wireless transmitter 1 can be arranged on one surface close to the wireless receiver 2 when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, and a corresponding action magnet is arranged at the position, corresponding to the reed switch, on the wireless receiver 2, so that when the charging input interface of the wireless transmitter 1 is connected with the charging output interface of the wireless receiver 2, the magnetic force of the action magnet can trigger the reed switch to act, and further trigger the power management chip to adjust the standby/working state of the wireless transmitter 1. When the photoelectric switch is used as the state detection switch, the wireless transmitter 1 can be arranged on one side close to the wireless receiver 2 when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, and a corresponding opening is arranged at a position on the wireless transmitter 1 corresponding to the photoelectric switch, so that when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, the photoelectric switch can transmit and receive light reflected by the wireless receiver 2 through the opening to act, and further triggers the power management chip to adjust the standby/working state of the wireless transmitter 1.

As shown in fig. 2(a), fig. 2(B), fig. 3(a) and fig. 3(B), in this embodiment, the charging output interface 27 of the wireless receiver 2 and the charging input interface 17 of the wireless transmitter 1 are a thimble-type magnetic socket 271 and a contact-type magnetic plug 171 with mechanical and electrical parameters matched with each other. The charging output detection circuit 24 of the wireless receiver 2 includes a state detection microswitch 241.

In this embodiment, the wireless transmitter 1 is fixedly suspended on the action component 2411 of the state detection microswitch 241 of the wireless receiver 2 through the magnetic attraction effect generated after the magnetic attraction plug 171 is attracted with the magnetic attraction socket 271 of the wireless receiver 2, so as to complete the automatic fixing of the wireless transmitter 1; meanwhile, the metal contact connected with the charging input line in the magnetic plug 171 and the thimble connected with the charging output line in the magnetic socket 271 are automatically aligned and in close contact under the action of magnetic force, so that the charging line is automatically connected.

As shown in fig. 3(a), in the present embodiment, the actuating member 2411 of the state detection microswitch 241 of the wireless receiver 2 is mechanically coupled to the magnetic attraction socket 271 of the charging output interface 27; when the charging output magnetic socket 271 of the wireless receiver 2 is not connected to the charging input magnetic plug 171 of the wireless transmitter 1 for charging, the action component 2411 of the state detection micro switch 241 drives the state detection micro switch 241 to detect that the internal electrical contact of the micro switch 241 is in a closed on state under the action of the elastic component in a relaxation state inside the state detection micro switch 241, so as to provide a power supply for the demodulation/power amplification circuit 22 of the wireless receiver 2, and the wireless receiver 2 is in a working state. As shown in fig. 2(a), when the charging output magnetic socket 271 of the wireless receiver 2 and the charging input magnetic socket 171 of the wireless transmitter 1 are in a connected charging state, the gravity borne by the device of the wireless transmitter 1 is transmitted to the action component 2411 of the state detection microswitch 241 mechanically coupled with the charging output magnetic socket 271 through the charging input magnetic socket 171 of the wireless transmitter 1 and the charging output magnetic socket 271 of the wireless receiver 2, the elastic component in a relaxation state inside the microswitch 241 is detected in a compression state, because the gravity borne by the device of the wireless transmitter 1 is greater than the elastic force of the elastic component inside the state detection microswitch 241, the elastic component is compressed, the action component 2411 acts to drive the electric contact in a closed on state inside the microswitch 241 to be converted into an off state, and stop providing power for the demodulation/power amplifier circuit 22 of the wireless receiver 2, the wireless receiver 2 is in a standby state.

Fig. 4(a) and 4(B) are schematic diagrams of the working principle of the second embodiment of the invention.

Fig. 5(a) and 5(B) are schematic diagrams illustrating the operation principle of the charging output detection circuit 24 of the wireless receiver 2 and the standby/operation detection circuit 14 of the wireless transmitter 1 according to the second embodiment of the present invention.

The second embodiment comprises 1 wireless receiver 2 and 1 wireless transmitter 1.

As shown in fig. 5(B), the standby/operation detection circuit 14 of the wireless transmitter 1 in this embodiment includes a state detection mercury switch 141 and a transistor 143; the state detection mercury switch 141 is connected to the state detection input terminal of the transistor 143; when the wireless transmitter 1 is in a horizontal/vertical angle, the state detection mercury switch 141 is turned off/on, and the trigger transistor 143 turns off/on the power supply of the charge and discharge control circuit 15 to the modulation/transmission circuit 12, so as to control the wireless transmitter 1 to be in a standby/working state. In order to avoid accidental stooping and other actions of a wearer, the angle of the wireless transmitter 1 is in a horizontal state in a short time, normal and stable work of the wireless transmitter 1 is influenced, and the circuit is added with a capacitor to filter out accidental short-time signal interference.

As shown in fig. 4(a) and 4(B), in this embodiment, the charging output interface 27 of the wireless receiver 2 and the charging input interface 17 of the wireless transmitter 1 are a wireless electromagnetic induction transmitting circuit 272 and an electromagnetic induction receiving circuit 172, which have mechanical and electrical parameters matched with each other. The wireless transmitter 1 is fixed at a proper position of the shell of the wireless receiver 2 through the magnetic attraction generated after the fixed magnet 173 of the shell device of the wireless transmitter 1 is attracted with the fixed magnet 273 of the device at the corresponding position of the shell of the wireless receiver 2, so that the receiving coil of the wireless electromagnetic induction receiving circuit 172 of the wireless transmitter 1 can be accurately aligned and tightly attached to the transmitting coil of the wireless electromagnetic induction transmitting circuit 272 of the wireless receiver 2, the automatic fixing of the device of the wireless transmitter 1 is realized, and the automatic connection of the charging line is completed.

As shown in fig. 5(a), fig. 4(a) and fig. 4(B), the charging output detection circuit 24 of the wireless receiver 2 in this embodiment includes a state detection photoelectric switch 242 and a power management chip 243. The state detection photoelectric switch 242 is connected to the state detection input end of the power management chip 243, and is fixed at a position, the detection surface of which corresponds to the wireless transmitter 1 attached to the casing of the wireless receiver 2, through the opening of the casing of the wireless receiver 2. When the wireless transmitter 1 is not attached to the casing of the wireless receiver 2 and is in a working state, the infrared light emitted by the infrared transmitting tube of the state detection photoelectric switch 242 returns without being blocked by an object and is received by the infrared receiving tube, and the power management chip 243 controls the demodulation/power amplification circuit 22 to be in a working state. When the wireless transmitter 1 needs to be charged and is adsorbed at the charging position of the shell of the wireless receiver 2, the infrared light emitted by the infrared transmitting tube of the state detection photoelectric switch 242 is shielded by the shell of the wireless transmitter 1 and returns to be received by the infrared receiving tube, the levels at the two ends of the infrared receiving tube are changed, the changed level signals are transmitted to the state detection input end of the power management chip 243, and the power management chip 243 controls the demodulation/power amplification circuit 22 to be in a standby state. At the same time, the wireless electromagnetic induction transmitting circuit 272 starts operating, and the internal storage battery 16 of the wireless transmitter 1 is charged by the wireless electromagnetic induction receiving circuit 172 of the wireless transmitter 1.

The charging output detection circuit 24 of the wireless receiver 2 in this embodiment may also be composed of a state detection reed switch and a power management chip. When the reed switch is arranged at the corresponding position of the wireless receiver 2 corresponding to the wireless transmitter 1 when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, and the acting magnet corresponding to the position device of the reed switch on the wireless transmitter 1 is arranged, so that when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, the magnetic force of the acting magnet can trigger the reed switch to act, and further trigger the power management chip to adjust the standby/working state of the wireless receiver 2.

The charging output detection circuit 24 of the wireless receiver 2 in this embodiment may also be composed of a state detection micro switch and a power management chip. The action component of the state detection microswitch acts under the action of the wireless transmitter 1 when the charging input interface 17 of the wireless transmitter 1 is connected with the charging output interface 27 of the wireless receiver 2, and further triggers the power management chip to adjust the standby/working state of the wireless receiver 2.

In the above embodiments, if the number of the charging output interfaces 27 of the wireless receiver 2 is increased appropriately, and the logical relationship of the state detection signal processing of the charging output detection circuit 24 for each charging output interface 27 is set appropriately, it is ensured that the wireless receiver 2 turns on the power supply of the demodulation/power amplification circuit as long as the charging output detection circuit 24 detects that any one of the charging output interfaces 27 is in the non-connected charging state, that is, at least one wireless transmitter 1 is in the working state, and the number of the wireless transmitters 1 can be increased appropriately to multiple ones, so as to meet the requirement when multiple users share one wireless receiver.

In addition, in order to ensure the overall use effect of the fully automatic wireless sound amplifying device, on the premise of meeting the requirement of high automation of the operation of the device, the demodulation/power amplification circuit 22 of the wireless receiver 2 needs to have sufficient power reserve with rated output power more than or equal to 10W, the matched loudspeaker 23 also needs to have corresponding power capacity, and technical indexes such as the caliber, the bandwidth, the thickness and the volume of the box body of the loudspeaker 23 also need to meet corresponding requirements. The full-automatic wireless sound amplification device not only can realize the beneficial technical effects of high automation in operation and convenience in use, but also has beautiful tone quality, and greatly improves the use experience of users.

The above embodiments are only some of the preferred embodiments specifically describing the content of the present invention, and any combination and modification without departing from the design idea of the present invention should be covered within the protection scope of the present invention.