Box-in detection circuit, charging case and wireless microphone

Abstract

The utility model discloses a kind of into box detection circuit, charging box and wireless microphone. Into box detection circuit includes: transmitter into box detection module, receiver into box detection module and microcontroller;Transmitter into box detection module is connected with first microphone transmitter and second microphone transmitter, and transmitter into box detection module is also connected with microcontroller, receiver into box detection module is connected with microphone receiver, and receiver into box detection module is also connected with microcontroller;When transmitter into box detection module detects the transmitter into box signal generated by first microphone transmitter or second microphone transmitter into box, transmitter detection signal is generated, transmitter detection signal is transmitted to microcontroller to carry out transmitter into box detection;When receiver into box detection module detects the receiver into box signal generated by microphone receiver into box, receiver detection signal is generated, receiver detection signal is transmitted to microcontroller to carry out receiver into box detection.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and in particular to a box-entry detection circuit, a charging box, and a wireless microphone. Background Technology

[0002] The wireless microphone charging case needs to recognize the entry and exit of the transmitter and receiver to recharge them. Conventional charging case chip solutions can only detect and control two devices (two microphone transmitters or one microphone transmitter and one receiver). However, multi-device wireless microphones can be extended to two microphone transmitters and one receiver, which may result in one device being unable to be detected and controlled. Utility Model Content

[0003] The main purpose of this utility model is to provide an in-box detection circuit, a charging box, and a wireless microphone, aiming to solve the technical problem that the recognition and detection of the in-box and out-of-box actions of the wireless microphone charging box in the prior art is not accurate enough.

[0004] To achieve the above objectives, this utility model proposes an in-box detection circuit, comprising:

[0005] Transmitter box detection module, receiver box detection module, and microcontroller;

[0006] The transmitter box detection module is connected to the first microphone transmitter and the second microphone transmitter. The transmitter box detection module is also connected to the microcontroller. The receiver box detection module is connected to the microphone receiver. The receiver box detection module is also connected to the microcontroller.

[0007] The transmitter in-box detection module is used to generate a transmitter detection signal when a transmitter in-box signal generated by the first microphone transmitter or the second microphone transmitter is detected, and transmit the transmitter detection signal to the microcontroller for transmitter in-box detection.

[0008] The receiver in-box detection module is used to generate a receiver detection signal when a receiver in-box signal is detected, and transmit the receiver detection signal to the microcontroller for receiver in-box detection.

[0009] In addition, to achieve the above objectives, this utility model also proposes a charging box, which includes the aforementioned box insertion detection circuit.

[0010] In addition, to achieve the above objectives, this utility model also proposes a wireless microphone, which includes: two microphone transmitters, a microphone receiver, and a charging box as described above. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the first embodiment of the box-entry detection circuit of this utility model;

[0014] Figure 2 The circuit connection diagram provided for the second embodiment of the box-entry detection circuit of this utility model;

[0015] Figure 3 The first circuit connection diagram provided for the third embodiment of the box-entry detection circuit of this utility model;

[0016] Figure 4 This is a second circuit connection diagram provided for the third embodiment of the box-entry detection circuit of this utility model;

[0017] Figure 5 This is a structural schematic diagram of an embodiment of the charging box of this utility model.

[0018] Explanation of reference numerals in the attached diagram: R1, first resistor; R2, second resistor; D1, first diode; C1, first capacitor; Q1, first switching transistor; Q2, second switching transistor; Q3, third switching transistor; Q4, fourth switching transistor; Q5, fifth switching transistor; Q6, sixth switching transistor; 10, transmitter in-box detection module; 20, receiver in-box detection module; 30, microcontroller; TX1, first microphone transmitter; TX2, second microphone transmitter; RX, microphone receiver; U1, integrated charging chip; U2, load switch; VIN, external power supply; VCC, power supply.

[0019] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0024] Based on this, this utility model embodiment provides a box insertion detection circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the box-entry detection circuit of this utility model.

[0025] In this embodiment, the in-box detection circuit is applied to the wireless microphone charging box. The in-box detection circuit includes: a transmitter in-box detection module 10, a receiver in-box detection module 20, and a microcontroller 30.

[0026] The transmitter in-box detection module 10 is connected to the first microphone transmitter TX1 and the second microphone transmitter TX2, and is also connected to the microcontroller 30. The receiver in-box detection module 20 is connected to the microphone receiver RX, and is also connected to the microcontroller 30.

[0027] It should be noted that the transmitter in-box detection module can be used to generate a transmitter detection signal when a transmitter in-box signal generated by the first microphone transmitter or the second microphone transmitter is detected, and transmit the transmitter detection signal to the microcontroller for transmitter in-box detection. Similarly, the receiver in-box detection module can be used to generate a receiver detection signal when a receiver in-box signal generated by the microphone receiver is detected, and transmit the receiver detection signal to the microcontroller for receiver in-box detection.

[0028] It should be understood that the wireless microphone uses a multi-device collaborative multi-mode configuration. It replenishes power to the microphone transmitter and receiver by recognizing their entry and exit from the charging box, and then controls communication and charging functions. Conventional charging box solutions can only detect and control two devices, but the multi-device configuration expands to two microphone transmitters and one receiver, potentially resulting in one device being undetectable and uncontrollable. Some charging boxes use mechanical buttons; when a device is placed inside the charging box, pressure is applied to the button to detect three devices. However, this method places high demands on the lifespan of the mechanical buttons and is prone to misidentification.

[0029] In this embodiment, the transmitter in-box detection module can be a dedicated electronic device for sampling whether two microphone transmitters (the first microphone transmitter and the second microphone transmitter) are in the box. For example, it can be implemented using an integrated chip or a dedicated circuit. The transmitter in-box detection module can acquire a transmitter in-box signal when the first microphone transmitter and / or the second microphone transmitter is in the box. This signal can be generated by a current source integrated at the connection pin of the transmitter in-box detection module, which produces a load change when the microphone transmitter is connected, thus reflecting the electrical signal generated by the voltage change. When the transmitter in-box detection module detects the transmitter in-box signal, it generates a transmitter detection signal at the pin connected to the microcontroller. The microcontroller unit (MCU) can be a miniature functional chip with data acquisition, processing, and signal transmission functions. It has a processor and memory, and can process the acquired data information according to the preset software program stored in the memory, generate corresponding processing result information, and transmit it. The microcontroller can determine that a microphone transmitter is in the box when it receives the transmitter detection signal, and determine that a microphone transmitter is out of the box when it does not receive the transmitter detection signal.

[0030] Furthermore, the receiver in-box detection module can be a dedicated electronic device for sampling whether the microphone receiver is in the box. Similar to the transmitter in-box detection module, it can be implemented using an integrated chip or a dedicated circuit; no specific limitation is made in this embodiment. The transmitter in-box detection module can collect a receiver in-box signal when the microphone receiver is in the box. The receiver in-box signal can be an electrical signal generated by the voltage change detected by the receiver in-box detection module when the microphone receiver is connected. When the receiver in-box detection module detects the receiver in-box signal, it transmits the receiver detection signal to the microcontroller. The microcontroller can determine that a microphone receiver is in the box when it receives the receiver detection signal, and determine that a microphone receiver is out of the box when it does not receive the receiver detection signal.

[0031] This embodiment provides a box-entry detection circuit, comprising: a transmitter box-entry detection module, a receiver box-entry detection module, and a microcontroller. The transmitter box-entry detection module is connected to a first microphone transmitter and a second microphone transmitter, and is also connected to the microcontroller. The receiver box-entry detection module is connected to a microphone receiver, and is also connected to the microcontroller. When the transmitter box-entry detection module detects a transmitter box-entry signal generated by the first or second microphone transmitter entering the box, it generates a transmitter detection signal and transmits it to the microcontroller for transmitter box-entry detection. When the receiver box-entry detection module detects a receiver box-entry signal generated by the microphone receiver entering the box, it generates a receiver detection signal and transmits it to the microcontroller for receiver box-entry detection. This achieves automatic identification of the receiver and transmitter when a wireless microphone is used for multi-device expansion, reducing costs and improving reliability.

[0032] Based on the first embodiment of this utility model, in the second embodiment of this utility model, the contents that are the same as or similar to those in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a circuit connection diagram provided for the second embodiment of the box-entry detection circuit of this utility model.

[0033] In this embodiment, the transmitter in-box detection module 10 includes: an integrated charging chip U1; the first pin of the integrated charging chip U1 is connected to the first microphone transmitter TX1, the second pin of the integrated charging chip U1 is connected to the second microphone transmitter TX2, the third pin of the integrated charging chip U1 is connected to the first terminal of the microcontroller 30, and the fourth pin of the integrated charging chip U1 is connected to the second terminal of the microcontroller 30.

[0034] It should be noted that the integrated charging chip can be a management chip with functions such as charge / discharge management and communication control, such as the SY8809 chip. Specifically, it can be connected to the first microphone transmitter via the first pin and the second microphone transmitter via the second pin. Both the first and second pins integrate current sources. A load resistor to ground is configured on the input line of the microphone transmitter. When the microphone transmitter is placed in the charging case, the current generated by the current source and the load resistor on the microphone transmitter form a voltage (i.e., the transmitter insertion signal). The integrated charging chip can detect this transmitter insertion signal. The integrated charging chip and the microcontroller can use an IIC communication scheme. By sending a transmitter detection signal, the microcontroller can read the microphone transmitter's insertion action.

[0035] It should be understood that when the integrated charging chip receives the box-entry signal from the first microphone transmitter on its first pin, it sends a transmitter detection signal through its third pin; when it receives the box-entry signal from the second microphone transmitter on its second pin, it sends a transmitter detection signal through its fourth pin. The microcontroller determines the box-entry action of the first and / or second microphone transmitter based on the signals received from the corresponding port pins.

[0036] Furthermore, the microcontroller can also be used to generate a communication data signal when it receives the transmitter detection signal, and transmit the communication data signal to the first microphone transmitter or the second microphone transmitter through the integrated charging chip; the integrated charging chip can also be used to transmit a transmitter charging signal to the first microphone transmitter or the second microphone transmitter when it receives a charging reply signal from the first microphone transmitter or the second microphone transmitter.

[0037] It should be noted that the communication data signal is the signal transmitted via IIC after the microcontroller recognizes the microphone transmitter entering the charging case. It can configure the internal registers of the integrated charging chip to enable the communication mode and control the communication direction between the first and second pins, thus enabling communication between the charging case and the microphone transmitter. After sending the communication data signal, the integrated charging chip is configured to receive, waiting for a reply signal from the microphone transmitter. Upon receiving the communication data signal, the microphone transmitter generates a reply signal to the integrated charging chip, thus enabling communication with the microphone transmitter. Since the transmission between the microphone transmitter and the integrated charging chip is single-wire, a corresponding communication protocol must be defined at the protocol layer to ensure that when one party sends, the other is in receiving mode, preventing both from sending data simultaneously. The integrated charging chip can also charge the microphone transmitter when it receives a reply signal from the microphone transmitter that includes a charging reply signal.

[0038] In one possible implementation, the integrated charging chip U1 includes: a first switch Q1, a second switch Q2, and a third switch Q3; the input terminal of the first switch Q1 is connected to an external power supply VIN, the output terminal of the first switch Q1 is connected to the input terminals of the second switch Q2 and the third switch Q3, the output terminal of the second switch Q2 is connected to a first pin of the integrated charging chip U1, and the output terminal of the third switch Q3 is connected to a second pin of the integrated charging chip U1. When the microphone transmitter needs to be charged, the external power supply voltage is transmitted to the second and third switches through the first switch, and the switching on and off of the second and third switches is controlled according to the charging needs of the first and second microphone transmitters, respectively transmitting power signals to the first and second microphone transmitters to realize the charging function of the microphone transmitter.

[0039] In this embodiment, the transmitter insertion detection module uses an integrated charging chip to detect the insertion of the two microphone transmitters into the charging box. The microcontroller generates communication data signals to enable communication between the charging box and the microphone transmitters. The integrated charging chip includes a first switch, a second switch, and a third switch to control the charging of the microphone transmitters, thus improving the reliability of the wireless microphone.

[0040] Based on the first and / or second embodiments of this utility model, in the third embodiment of this utility model, the contents that are the same as or similar to those in the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 The first circuit connection diagram provided for the third embodiment of the box-entry detection circuit of this utility model.

[0041] In this embodiment, the receiver in-box detection module 20 includes: a first resistor R1, a second resistor R2, and a first diode D1; the first end of the first resistor R1 is connected to the power supply VCC, the second end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the first diode D1, the second end of the second resistor R2 is connected to the microcontroller 30, and the second end of the first diode D1 is connected to the microphone receiver RX.

[0042] It should be noted that the first resistor and the first diode are pulled up to the power supply (which can be set to 3V). The microcontroller periodically detects the voltage between the first resistor and the first diode. For example, when the microphone receiver is not in the charging case, the microcontroller detects a 3V voltage. When the microphone receiver is placed in the charging case, because the microphone receiver's input port has a pull-down resistor to ground, a voltage drop (e.g., 0.5V drop) will occur between the first resistor and the first diode due to the voltage division with the pull-up resistor. This is the receiver insertion signal. The microcontroller can achieve microphone receiver insertion detection by periodically cyclically detecting (e.g., 50Hz).

[0043] Furthermore, the receiver in-box detection module 20 also includes: a second resistor R2, a fourth switch Q4, and a fifth switch Q5; the first terminal of the fourth switch Q4 is connected to the microcontroller 30 and the first terminal of the second resistor R2, the second terminal of the second resistor R2 is connected to the power supply VCC, the second terminal of the fourth switch Q4 is connected to the first terminal of the fifth switch Q5, the second terminal of the fifth switch Q5 is connected to the microphone receiver RX, and the third terminals of both the fourth switch Q4 and the fifth switch Q5 are connected to the microcontroller 30. (Refer to...) Figure 4 , Figure 4 This is a second circuit connection diagram provided for the third embodiment of the box-entry detection circuit of this utility model.

[0044] It should be noted that communication between the charging case and the microphone receiver is achieved through the microcontroller transmitting the communication data signal to the input of the fourth switching transistor. The fourth and fifth switching transistors then perform level conversion and voltage isolation, ultimately sending the communication data signal to the input of the microphone receiver. Since the microphone receiver and charging case use a single-wire transmission, their communication protocol must be defined at the protocol layer to ensure that when one is transmitting, the other is in a receiving state, and simultaneous transmission of data by both is prohibited.

[0045] Furthermore, the receiver in-box detection module is also connected to the transmitter in-box detection module. The transmitter in-box detection module can also be used to transmit the receiver charging signal to the microphone receiver. Since the transmitter in-box detection module includes a chip with charge / discharge management capabilities, it enables the charging function for the microphone receiver.

[0046] In one possible implementation, the receiver in-box detection module 20 further includes: a load switch U2, a first capacitor C1, and a sixth switch Q6; the first terminal of the load switch U2 is connected to the microcontroller 30, the second terminal of the load switch U2 is connected to the transmitter in-box detection module 10, the second terminal of the load switch U2 is connected to the first capacitor C1 and the first terminal of the sixth switch Q6, the second terminal of the first capacitor C1 is grounded, the second terminal of the sixth switch Q6 is connected to the microphone receiver RX, and the third terminal of the sixth switch Q6 is connected to the microcontroller 30.

[0047] It should be noted that the load switch disconnects when the charging case needs to communicate with the microphone receiver, allowing for rapid discharge of the first capacitor and preventing interference with communication. The load switch turns on when the microphone receiver needs charging, and the integrated charging chip in the transmitter's charging case detection module transmits the power supply signal to the microphone receiver's input. Since communication and charging share the same circuit, the charging case must define a protocol at the protocol layer to prevent simultaneous communication and charging.

[0048] Furthermore, to avoid simultaneous communication and charging, the fourth and fifth switches in the communication line are NMOS transistors, and the sixth switch in the charging line is a PMOS transistor. Their gates are all connected to the same control signal port of the microcontroller, so that only one of the communication line and the charging line will be turned on at any given time.

[0049] In this embodiment, the receiver insertion / exit detection module includes a first resistor, a second resistor, and a first diode. The voltage change between the first resistor and the first diode is used to detect the microphone receiver's insertion / exit from the receiver case. The receiver insertion / exit detection module also includes a second resistor, a fourth switch, and a fifth switch. The fourth and fifth switches are used to achieve level conversion and voltage isolation of communication data, and simultaneously, the transmitter insertion / exit detection module enables the receiver's charging function. This further improves the reliability of the wireless microphone.

[0050] Further, please refer to Figure 5 , Figure 5 This is a structural schematic diagram of an embodiment of the charging box of this utility model. This utility model embodiment also proposes a charging box. The charging box includes the insertion detection circuit described above.

[0051] Since the charging case adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0052] Furthermore, this embodiment of the invention also proposes a wireless microphone. The wireless microphone includes two microphone transmitters, one microphone receiver, and the in-box detection circuit as described above.

[0053] Since the wireless microphone adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0054] It should be noted that the above examples are only for understanding this utility model and do not constitute a limitation on the box-entry detection circuit of this utility model. Any simple modifications based on this technical concept are within the protection scope of this utility model.

[0055] The above description is only a preferred embodiment of the present utility model and does not limit the scope of protection of the present utility model. All equivalent structural transformations made under the concept of the present utility model and based on the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A box-entry detection circuit, characterized in that, The in-box detection circuit is applied to the wireless microphone charging case, and the in-box detection circuit includes: a transmitter in-box detection module, a receiver in-box detection module, and a microcontroller; The transmitter box detection module is connected to the first microphone transmitter and the second microphone transmitter, and is also connected to the microcontroller. The receiver box detection module is connected to the microphone receiver, and is also connected to the microcontroller. The transmitter in-box detection module is used to generate a transmitter detection signal when a transmitter in-box signal generated by the first microphone transmitter or the second microphone transmitter is detected, and to transmit the transmitter detection signal to the microcontroller for transmitter in-box detection. The receiver in-box detection module is used to generate a receiver detection signal when a receiver in-box signal is detected generated by the microphone receiver being in the box, and to transmit the receiver detection signal to the microcontroller for receiver in-box detection.

2. The in-cartridge detection circuit as described in claim 1, characterized in that, The transmitter insertion detection module includes: an integrated charging chip; The first pin of the integrated charging chip is connected to the first microphone transmitter, the second pin of the integrated charging chip is connected to the second microphone transmitter, the third pin of the integrated charging chip is connected to the first terminal of the microcontroller, and the fourth pin of the integrated charging chip is connected to the second terminal of the microcontroller.

3. The in-cartridge detection circuit as described in claim 2, characterized in that, The microcontroller is also configured to generate a communication data signal when it receives the transmitter detection signal, and transmit the communication data signal to the first microphone transmitter or the second microphone transmitter through the integrated charging chip; The integrated charging chip is also used to transmit a transmitter charging signal to the first microphone transmitter or the second microphone transmitter when it receives a charging response signal from the first microphone transmitter or the second microphone transmitter.

4. The in-cartridge detection circuit as described in claim 3, characterized in that, The integrated charging chip includes: a first switching transistor, a second switching transistor, and a third switching transistor; The input terminal of the first switching transistor is connected to an external power supply, and the output terminal of the first switching transistor is connected to the input terminal of the second switching transistor and the input terminal of the third switching transistor. The output terminal of the second switching transistor is connected to the first pin of the integrated charging chip, and the output terminal of the third switching transistor is connected to the second pin of the integrated charging chip.

5. The in-cartridge detection circuit as described in claim 1, characterized in that, The receiver in-box detection module includes: a first resistor, a second resistor, and a first diode; The first end of the first resistor is connected to the power supply, the second end of the first resistor is connected to the first end of the second resistor and the first end of the first diode, the second end of the second resistor is connected to the microcontroller, and the second end of the first diode is connected to the microphone receiver.

6. The in-cartridge detection circuit as described in claim 5, characterized in that, The receiver in-box detection module also includes: a second resistor, a fourth switch, and a fifth switch; The first terminal of the fourth switch is connected to the microcontroller and the first terminal of the second resistor. The second terminal of the second resistor is connected to the power supply. The second terminal of the fourth switch is connected to the first terminal of the fifth switch. The second terminal of the fifth switch is connected to the microphone receiver. The third terminals of both the fourth and fifth switches are connected to the microcontroller.

7. The in-cartridge detection circuit as described in claim 6, characterized in that, The receiver box detection module is also connected to the transmitter box detection module. The transmitter in-box detection module is also used to transmit the receiver charging signal to the microphone receiver through the receiver in-box detection module.

8. The in-cartridge detection circuit as described in claim 7, characterized in that, The receiver in-box detection module also includes: a load switch, a first capacitor, and a sixth switching transistor; The first terminal of the load switch is connected to the microcontroller, the second terminal of the load switch is connected to the transmitter in-box detection module, the second terminal of the load switch is connected to the first capacitor and the first terminal of the sixth switch transistor, the second terminal of the first capacitor is grounded, the second terminal of the sixth switch transistor is connected to the microphone receiver, and the third terminal of the sixth switch transistor is connected to the microcontroller.

9. A charging case, characterized in that, The charging case includes: an insertion detection circuit as described in any one of claims 1-8.

10. A wireless microphone, characterized in that, The wireless microphone includes: two microphone transmitters, one microphone receiver, and a charging case as described in claim 9.

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