Recording equipment and control method thereof

Abstract

The invention relates to the technical field of recording equipment, and relates to recording equipment and a control method thereof, the recording equipment comprises a power supply management circuit, a wireless communication module, a recording module, a multifunctional chip, a main control chip, a transmission interface, a first analog switch circuit and a second analog switch circuit, the multifunctional chip is connected with the wireless communication module and the recording module; the main control chip is connected with the power management circuit and the multifunctional chip; the transmission interface is connected with the power management circuit and is connected with the main control chip through the first analog switch circuit; the second analog switch circuit is connected with the multifunctional chip and is connected with the transmission interface through the first analog switch circuit; the main control chip is used for controlling the switching of the first analog switch circuit so as to selectively connect the transmission interface to the main control chip or the second analog switch circuit; and controlling the second analog switch circuit to switch so as to selectively connect a data transmission path or a firmware upgrading path between the multifunctional chip and the first analog switch circuit. The circuit structure can be simplified, and the hardware cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of recording equipment technology, and in particular to a recording device and its control method. Background Technology

[0002] To address the pain points of traditional recording devices, such as short battery life and the need to carry a power bank, recording devices that combine recording and power bank functions have emerged.

[0003] In related technologies, recording devices include core components such as a main control chip, a recording module, and a power management circuit. The control chip of the recording module and the main control chip communicate with external devices through corresponding interfaces. This results in a relatively complex overall circuit layout and high hardware costs for the recording device. Summary of the Invention

[0004] This invention provides a recording device and its control method to solve the problems of complex overall circuit wiring and high hardware cost of existing recording devices.

[0005] This invention discloses a recording device, comprising: Power management circuitry; Wireless communication module, used for communicating with external devices; The recording module is used for recording operations and recording data storage operations; A multi-functional chip is connected to the wireless communication module and the recording module; The main control chip is connected to the power management circuit and the multi-functional chip. A transmission interface is connected to the power management circuit and to the main control chip via a first analog switch circuit. The second analog switch circuit is connected to the multi-functional chip and is connected to the transmission interface through the first analog switch circuit. The main control chip is used to control the switching of the first analog switch circuit to selectively connect the transmission interface to the main control chip or the second analog switch circuit; and to control the switching of the second analog switch circuit to selectively connect the data transmission path or firmware upgrade path between the multi-function chip and the first analog switch circuit.

[0006] Optionally, the first analog switch circuit includes a first analog switch, the first analog switch having a first data bus terminal, a first channel and a second channel, the first data bus terminal being connected to the transmission interface, and the first channel being connected to the firmware upgrade terminal of the main control chip; The second analog switch circuit includes a second analog switch, which has a second data bus terminal, a third channel, and a fourth channel. The second data bus terminal is connected to the second channel, the third channel is connected to the data transmission terminal of the multi-function chip, and the fourth channel is connected to the firmware upgrade terminal of the multi-function chip. The control terminals of the first analog switch and the second analog switch are both connected to the main control chip.

[0007] Optionally, the recording device further includes a third analog switch circuit and a display module. The display module includes a display driver chip and a display unit connected to the display driver chip. The third analog switch circuit connects the transmission interface, the main control chip, the power management circuit, and the display driver chip. The main control chip is also used to control the switching of the third analog switch circuit to selectively connect the transmission interface to the power management circuit or the display driver chip.

[0008] Optionally, the third analog switch circuit includes a third analog switch, which has a third data bus terminal, a fifth channel, and a sixth channel. The third data bus terminal is connected to the transmission interface, the fifth channel is connected to the firmware upgrade terminal of the power management circuit, the sixth channel is connected to the firmware upgrade terminal of the display driver chip, and the control terminal of the third analog switch is connected to the main control chip.

[0009] Optionally, the recording device further includes a housing, in which the power management circuit, wireless communication module, recording module, multi-function chip, first analog switch circuit, second analog switch circuit, and main control chip are all disposed. The housing includes a placement end face for placing electronic devices. The recording module includes a storage chip, a bone conduction microphone, and at least one digital microphone. The storage chip, the bone conduction microphone, and each of the digital microphones are all connected to the multi-function chip. The bone conduction microphone is fitted to the inner side of the placement end face, and each of the digital microphones is disposed on the inner side of the housing.

[0010] Optionally, the power management circuit includes a battery, a battery management module, a buck-boost module, and a wireless charging module. The buck-boost module is connected to the battery management module, the transmission interface, and the wireless charging module. The battery management module is connected to the battery. The wireless charging module is disposed on the inner side near the placement end face.

[0011] Optionally, the recording device further includes a circuit board, on which the main control chip, the first analog switch circuit, the third analog switch circuit, and the buck-boost module are all disposed. The recording device also includes a first temperature detection module and a second temperature detection module connected to the main control chip. The first temperature detection module is used to detect the temperature of the battery, and the second temperature detection module is used to detect the temperature of the circuit board.

[0012] Optionally, the first temperature detection module includes a first resistor, a second resistor, a first capacitor, and a first thermistor. The first resistor and the first thermistor are connected in series between an external power supply and ground. One end of the second resistor is connected to the series connection point of the first resistor and the first thermistor, and the other end is connected to the main control chip and one end of the first capacitor. The other end of the first capacitor is connected to ground. Alternatively, the second temperature detection module includes a third resistor, a fourth resistor, a second capacitor, and a second thermistor. The third resistor and the second thermistor are connected in series between an external power supply and ground. One end of the fourth resistor is connected to the series connection point of the third resistor and the second thermistor, and the other end is connected to the main control chip and one end of the second capacitor. The other end of the second capacitor is connected to ground.

[0013] Optionally, the wireless communication module includes a Bluetooth communication unit and a WIFI communication unit, both of which are connected to the multi-functional chip. The Bluetooth communication unit includes a first antenna connector, a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, a sixth resistor, a first inductor, a second antenna connector, and a first electrostatic discharge (ESD) tube. The fifth resistor is connected in series with the first inductor and then connected in series between the first radio frequency (RF) signal terminal of the multi-functional chip and the first terminal of the first antenna connector. The series connection point of the fifth resistor and the first inductor is connected to one end of the sixth resistor and one end of the third capacitor. The other end of the sixth resistor is connected to the second antenna connector. The other end of the third capacitor is grounded. The first RF signal terminal of the multi-functional chip is also connected to one end of the fourth capacitor and one end of the first ESD tube. The other ends of the fourth capacitor and the first ESD tube are both grounded. One end of the fifth capacitor is connected to the third terminal of the first antenna connector, and the other end is grounded.

[0014] Optionally, the WIFI communication unit includes a third antenna connector, a fourth antenna connector, a second inductor, a third inductor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, a seventh resistor, an eighth resistor, and a second electrostatic discharge (ESD) protection tube. The second inductor, the third inductor, and the seventh resistor are connected in series between the second RF signal terminal of the multi-functional chip and the first terminal of the third antenna connector. One end of the second ESD protection tube and one end of the sixth capacitor are both connected to the second RF signal terminal of the multi-functional chip, and the other ends are both grounded. One end of the seventh capacitor and one end of the eighth capacitor are both connected to the series node of the second inductor and the third inductor, and the other ends are both grounded. One end of the ninth capacitor and one end of the eighth resistor are both connected to the series node of the third inductor and the seventh resistor, and the other end of the ninth capacitor is grounded. The other end of the eighth resistor is connected to the first terminal of the fourth antenna connector. The second, third, and fourth terminals of the fourth antenna connector are all grounded. The second terminal of the third antenna connector is grounded, and the third terminal is grounded through the tenth capacitor.

[0015] The present invention also discloses a control method for a recording device, applied to a recording device as described in any of the preceding claims, the control method comprising: Upon receiving a first trigger signal, the main control chip controls the first analog switch circuit to switch based on the first trigger signal, so as to selectively connect the transmission interface to the main control chip or the second analog switch circuit. Upon receiving a second trigger signal, the main control chip controls the switching of the second analog switch circuit based on the second trigger signal to selectively connect the data transmission path or firmware upgrade path between the multi-functional chip and the first analog switch circuit.

[0016] The beneficial effects of the recording device provided in this embodiment of the invention are as follows: The multi-functional chip connects the wireless communication module and the recording module, and can control the recording module to perform recording and recording data storage operations, and control the transmission of recording data to external devices through the wireless communication module. The setting of the multi-functional chip allows the wireless communication module and the recording module to be far away from the control part of the power management circuit, reducing the electromagnetic interference of the power management circuit. By setting the first analog switch circuit and the second analog switch circuit, the main control chip controls the switching of the first analog switch circuit and the second analog switch circuit, realizing the selective connection of the transmission interface between the main control chip and the multi-functional chip, as well as the flexible switching between the data transmission path and the firmware upgrade path of the multi-functional chip, which greatly saves hardware resources, eliminates the need to set up separate transmission interfaces for the main control chip and the multi-functional chip, simplifies the circuit structure, reduces the complexity of circuit wiring, and reduces hardware costs. Attached Figure Description

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a structural block diagram of the recording device provided in an embodiment of the present invention; Figure 2 This is a circuit diagram of the main control chip provided in an embodiment of the present invention; Figure 3 This is a circuit diagram of the multifunctional chip provided in an embodiment of the present invention; Figure 4 This is a circuit diagram of the transmission interface provided in an embodiment of the present invention; Figure 5 This is a circuit diagram of the first analog switch circuit provided in an embodiment of the present invention; Figure 6 This is a circuit diagram of the second analog switch circuit provided in an embodiment of the present invention; Figure 7 This is a circuit diagram of the third analog switch circuit provided in an embodiment of the present invention; Figure 8 This is a circuit diagram of the display driver chip provided in an embodiment of the present invention; Figure 9 This is a partial circuit diagram of the display unit provided in an embodiment of the present invention; Figure 10 This is a circuit diagram of a bone conduction microphone provided in an embodiment of the present invention; Figure 11 This is a circuit diagram of a digital microphone provided in an embodiment of the present invention; Figure 12 This is a circuit diagram of a memory chip provided in an embodiment of the present invention; Figure 13 This is a circuit diagram of the first temperature detection module provided in an embodiment of the present invention; Figure 14 This is a circuit diagram of the second temperature detection module provided in an embodiment of the present invention; Figure 15 This is a three-dimensional structural diagram of the recording device provided in an embodiment of the present invention; Figure 16 This is an exploded structural diagram of the recording device provided in an embodiment of the present invention.

[0018] The labels for the attached figures are as follows: 110. Power management circuit; 111. Battery; 112. Battery management module; 113. Buck-boost module; 114. Wireless charging module; 120. Wireless communication module; 121. Bluetooth communication unit; 122. WIFI communication unit; 130. Recording module; 140. Transmission interface; 150. First analog switch circuit; 160. Second analog switch circuit; 170. Third analog switch circuit; 180. Display module; 181. Display unit; 190. Housing; 191. Placement end face; 210. Circuit board; 220. First temperature detection module; 230. Second temperature detection module; U1, Multifunctional chip; U2, Main control chip; U3, First analog switch; U4, Second analog switch; U5, Display driver chip; U6, Third analog switch; U7, Storage chip; U8, Bone conduction microphone; U9, Digital microphone; R1, First resistor; R2, Second resistor; R3, First thermistor; R4, Third resistor; R5, Fourth resistor; R6, Second thermistor; C1, First capacitor; C2, Second capacitor; ANT1, First antenna connector; C3, Third capacitor; C4, Second... Four capacitors; C5, fifth capacitor; R7, fifth resistor; R8, sixth resistor; L1, first inductor; IPEX1, second antenna connector; ESD1, first electrostatic discharge protection tube; ANT2, third antenna connector; IPEX2, fourth antenna connector; L2, second inductor; L3, third inductor; C6, sixth capacitor; C7, seventh capacitor; C8, eighth capacitor; C9, ninth capacitor; C10, tenth capacitor; R9, seventh resistor; R10, eighth resistor; ESD2, second electrostatic discharge protection tube. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] This invention provides a recording device, such as... Figure 1 As shown, the recording device includes a power management circuit 110, a wireless communication module 120, a recording module 130, a multi-function chip U1, a main control chip U2, a transmission interface 140, a first analog switch circuit 150, and a second analog switch circuit 160.

[0021] The wireless communication module 120 is used to communicate with external devices and can transmit the recording data of the recording module 130 to the external devices.

[0022] The recording module 130 is used for recording operations and recording data storage operations.

[0023] The multi-function chip U1 is connected to the wireless communication module 120 and the recording module 130. The multi-function chip U1 is used to control the wireless communication module 120 to communicate with external devices, and to control the recording module 130 to perform recording operations and record data storage operations, and to transmit the recording data of the recording module 130 to the external devices through the wireless communication module 120.

[0024] The main control chip U2 is connected to the power management circuit 110 and the multi-function chip U1.

[0025] The transmission interface 140 is connected to the power management circuit 110 and to the main control chip U2 through the first analog switch circuit 150.

[0026] The second analog switch circuit 160 is connected to the multi-function chip U1 and is connected to the transmission interface 140 through the first analog switch circuit 150.

[0027] The main control chip U2 is used to control the switching of the first analog switch circuit 150 to selectively connect the transmission interface 140 to the main control chip U2 or the second analog switch circuit 160; and to control the switching of the second analog switch circuit 160 to selectively connect the data transmission path or firmware upgrade path between the multi-function chip U1 and the first analog switch circuit 150.

[0028] Specifically, when the first analog switch circuit 150 switches to connect the transmission interface 140 to the main control chip U2, external devices can use the transmission interface 140 to program the main control chip U2 and perform firmware upgrades. When the first analog switch circuit 150 switches to connect the transmission interface 140 to the second analog switch circuit 160, further, when the second analog switch circuit 160 switches to connect the data transmission path between the multi-function chip U1 and the first analog switch circuit 150, the multi-function chip U1 can transmit the recording data of the recording module 130 to the external device through the transmission interface 140; when the second analog switch circuit 160 switches to connect the firmware upgrade path between the multi-function chip U1 and the first analog switch circuit 150, external devices can use the transmission interface 140 to program the multi-function chip U1 and perform firmware upgrades.

[0029] Therefore, in this embodiment, the multi-functional chip U1 connects the wireless communication module 120 and the recording module 130, and can control the recording module 130 to perform recording and recording data storage operations, and control the transmission of recording data to external devices through the wireless communication module 120. The setting of the multi-functional chip U1 allows the wireless communication module 120 and the recording module 130 to be far away from the control part of the power management circuit 110, reducing the electromagnetic interference of the power management circuit 110. By setting the first analog switch circuit 150 and the second analog switch circuit 160, the main control chip U2 controls the switching of the first analog switch circuit 150 and the second analog switch circuit 160, realizing the selective connection of the transmission interface 140 between the main control chip U2 and the multi-functional chip U1, as well as the flexible switching of the data transmission path and the firmware upgrade path of the multi-functional chip U1, which greatly saves hardware resources, eliminates the need to set up a separate transmission interface 140 for the main control chip U2 and the multi-functional chip U1, simplifies the circuit structure, reduces the complexity of circuit wiring, and reduces hardware costs.

[0030] Optionally, the multi-functional chip U1 can use existing chips to implement the recording operation and recording data storage operation control of the recording module 130, as well as the communication control of the wireless communication module 120, such as the AI7194T or other models of chips. The main control chip U2 can also use existing chips to implement the switching control of the first analog switch circuit 150 and the second analog switch circuit 160, such as the CS32G023 or other models of chips.

[0031] like Figures 1 to 6 As shown, in an optional embodiment of this application, the first analog switch circuit 150 includes a first analog switch U3, which has a first data bus terminal, a first channel, and a second channel. The first data bus terminal is connected to the transmission interface 140, and the first channel is connected to the firmware upgrade terminal of the main control chip U2. The second analog switch circuit 160 includes a second analog switch U4, which has a second data bus terminal, a third channel, and a fourth channel. The second data bus terminal is connected to the second channel, the third channel is connected to the data transmission terminal of the multi-function chip U1, and the fourth channel is connected to the firmware upgrade terminal of the multi-function chip U1. The control terminals of the first analog switch U3 and the second analog switch U4 are both connected to the main control chip U2.

[0032] Specifically, the first data bus terminal of the first analog switch U3 is directly connected to the transmission interface 140. By switching between the first and second channels, the transmission interface 140 can either connect to the firmware upgrade terminal of the main control chip U2 through the first channel to perform firmware upgrades on the main control chip U2, or connect to the second analog switch U4 through the second channel, and then connect to the multi-function chip U1 to perform data transmission or firmware upgrades. This eliminates the need for separate transmission interfaces 140 for the main control chip U2 and the multi-function chip U1; a single transmission interface 140 can meet the external communication needs of the main control chip U2 and the multi-function chip U1 (such as firmware upgrades and data exchange), significantly reducing interface hardware costs and wiring space. The second analog switch U4 isolates the data transmission terminal and firmware upgrade terminal of the multi-function chip U1 through the third and fourth channels. When interaction with the multi-function chip U1 is required through the transmission interface 140, the main control chip U2 can control the second analog switch U4 to switch to the third channel for data transmission; and switch to the fourth channel for firmware upgrade operations. The two types of paths are physically isolated, avoiding signal conflicts between daily data transmission and firmware upgrade operations, and improving circuit reliability. The control terminals of the first analog switch U3 and the second analog switch U4 are both connected to the main control chip U2, which means that the main control chip U2 can switch different paths according to the needs of the scenario through a unified control signal.

[0033] like Figures 1 to 9 As shown, in an optional embodiment of this application, the recording device further includes a third analog switch circuit 170 and a display module 180. The display module 180 includes a display driver chip U5 and a display unit 181 connected to the display driver chip U5. The third analog switch circuit 170 is connected to the transmission interface 140, the main control chip U2, the power management circuit 110, and the display driver chip U5. The main control chip U2 is also used to control the switching of the third analog switch circuit 170 to selectively connect the transmission interface 140 to the power management circuit 110 or the display driver chip U5.

[0034] Specifically, the display driver chip U5 can drive the display unit 181 to display information related to the recording device, such as the working status of the power management circuit 110 and the working status of the recording module 130. The third analog switch circuit 170, by multiplexing the lines of the transmission interface 140, allows the transmission interface 140 to selectively connect to the main control chip U2, the multi-function chip U1, and also to the power management circuit 110 or the display driver chip U5 of the display module 180. This enables firmware upgrades for the power management circuit 110 or the display driver chip U5 without requiring separate interfaces for them. A single transmission interface 140 can handle firmware upgrades for the main control chip U2, the multi-function chip U1, the power management circuit 110, and the display module 180, as well as the data transmission function of the multi-function chip U1, maximizing the utilization of hardware interface resources.

[0035] Optionally, the display unit 181 employs a display screen and its peripheral circuitry. The display screen can show relevant information about the recording device. The display screen can be an LED screen, an OLED screen, etc., and the circuit diagram of the display unit 181 is shown below. Figure 9 As shown. In other embodiments, the display unit 181 may also be a digital tube and its peripheral circuitry, or it may display relevant information about the recording device.

[0036] Optional, such as Figures 1 to 9 As shown, the third analog switch circuit 170 includes a third analog switch U6, which has a third data bus terminal, a fifth channel, and a sixth channel. The third data bus terminal is connected to the transmission interface 140, the fifth channel is connected to the firmware upgrade terminal of the power management circuit 110, the sixth channel is connected to the firmware upgrade terminal of the display driver chip U5, and the control terminal of the third analog switch U6 is connected to the main control chip U2.

[0037] Specifically, the fifth channel of the third analog switch U6 is dedicated to the firmware upgrade terminal of the power management circuit 110, and the sixth channel is dedicated to the firmware upgrade terminal of the display driver chip U5. The two paths are physically isolated. During the upgrade, the main control chip U2 controls the switching of the third analog switch U6 to ensure that the upgrade signal of the transmission interface 140 can only flow to the corresponding power management circuit 110 or display driver chip U5: when upgrading the power management circuit 110, only the fifth channel is connected to avoid the signal from flowing into the display module 180 and causing its firmware to become corrupted; when upgrading the display driver chip U5, only the sixth channel is connected to prevent the power management circuit 110 from receiving invalid upgrade data. This "one-to-one" channel design eliminates signal conflicts during multi-module upgrades at the hardware level and improves upgrade reliability.

[0038] like Figures 1 to 3 , Figures 9 to 12 , Figure 15 and Figure 16 As shown, in an optional embodiment of this application, the recording device further includes a housing 190. The power management circuit 110, the wireless communication module 120, the recording module 130, the multi-function chip U1, the first analog switch circuit 150, the second analog switch circuit 160, and the main control chip U2 are all disposed within the housing 190. The housing 190 includes a placement end face 191 for placing electronic devices. The recording module 130 includes a storage chip U7, a bone conduction microphone U8, and at least one digital microphone U9. The storage chip U7, the bone conduction microphone U8, and each digital microphone U9 are all connected to the multi-function chip U1. The bone conduction microphone U8 is fitted to the inner side of the placement end face 191, and each digital microphone U9 is disposed on the inner side of the housing 190.

[0039] Specifically, the power management circuit 110, wireless communication module 120, recording module 130, multi-function chip U1, first analog switch circuit 150, second analog switch circuit 160 and main control chip U2 are all housed in the housing 190. The housing 190 can isolate external dust, moisture and physical impact, protect the internal circuits, protect the circuit stability and extend the service life of the equipment.

[0040] The bone conduction microphone U8 is attached to the inner side of the placement surface 191 of the housing 190. When an external electronic device (such as a mobile phone) is placed on the placement surface 191, the audio signal played by the electronic device will cause the housing 190 to vibrate, which is picked up by the bone conduction microphone U8. The multi-functional chip U1 can control the bone conduction microphone U8 to capture and record the audio signal of the electronic device, and can also control the digital microphone U9 to capture it, improving the flexibility and applicability of recording. The recording data captured and recorded by the digital microphone U9 and the bone conduction microphone U8 can be stored locally by the storage chip U7 to avoid data loss due to wireless transmission interruption, and at the same time provide redundancy for subsequent transmission or local retrieval.

[0041] like Figure 1 and Figure 16 As shown, in an optional embodiment of this application, the power management circuit 110 includes a battery 111, a battery management module 112, a buck-boost module 113, and a wireless charging module 114. The buck-boost module 113 is connected to the battery management module 112, the transmission interface 140, and the wireless charging module 114. The battery management module 112 is connected to the battery 111. The wireless charging module 114 is disposed on the inner side near the placement end face 191.

[0042] Specifically, the wireless charging module 114 is located on the inner side near the placement end face 191. When the electronic device is placed on the placement end face 191 of the housing 190, the recording device can not only record the audio signal played by the electronic device, but also charge the electronic device through the wireless charging module 114. The buck-boost module 113 is used for voltage conversion. It can convert the electrical energy received by the transmission interface 140 into a suitable voltage to charge the battery 111, and it can also convert the voltage of the battery 111 into a suitable voltage to charge external electronic devices through the wireless charging module 114. The battery management module 112 is connected to the battery 111 and is used to protect the battery 111, including overcharge protection, over-discharge protection, and short circuit protection, thereby improving the safety of the battery 111. At the same time, the battery management module 112 is also used to monitor the battery 111's power level in real time.

[0043] like Figure 1 and Figure 16 As shown, in an optional embodiment of this application, the recording device further includes a circuit board 210, on which the main control chip U2, the first analog switch circuit 150, the third analog switch circuit 170 and the buck-boost module 113 are all disposed. The recording device also includes a first temperature detection module 220 and a second temperature detection module 230 connected to the main control chip U2. The first temperature detection module 220 is used to detect the temperature of the battery 111, and the second temperature detection module 230 is used to detect the temperature of the circuit board 210.

[0044] Specifically, key modules such as the main control chip U2, the first analog switch circuit 150, the third analog switch circuit 170, and the buck-boost module 113 are concentrated on the same circuit board 210, reducing external wires and connectors, lowering the risk of signal interference and poor contact, and improving circuit stability. The first temperature detection module 220 monitors the temperature of the battery 111. In conjunction with the battery management module 112, it can trigger protection measures such as pausing charging, reducing current, or limiting power when the temperature of the battery 111 is abnormal during charging / discharging, preventing the battery 111 from bulging, aging, or even catching fire. The second temperature detection module 230 monitors the temperature of the circuit board 210, and then monitors the temperature of heat-generating components such as the main control chip U2 and the buck-boost module 113. This allows for early intervention when these heat-generating components are overheated, preventing the core circuit from overheating and shutting down or burning out, thus improving the overall safety of the recording equipment.

[0045] like Figure 1 and Figure 2 , Figure 13 and Figure 14As shown, in an optional embodiment of this application, the first temperature detection module 220 includes a first resistor R1, a second resistor R2, a first capacitor C1, and a first thermistor R3. The first resistor R1 and the first thermistor R3 are connected in series between the external power supply and ground. One end of the second resistor R2 is connected to the series node of the first resistor R1 and the first thermistor R3, and the other end is connected to the main control chip U2 and one end of the first capacitor C1. The other end of the first capacitor C1 is connected to ground. And / or, the second temperature detection module 230 includes a third resistor R4, a fourth resistor R5, a second capacitor C2, and a second thermistor R6. The third resistor R4 and the second thermistor R6 are connected in series between the external power supply and ground. One end of the fourth resistor R5 is connected to the series node of the third resistor R4 and the second thermistor R6, and the other end is connected to the main control chip U2 and one end of the second capacitor C2. The other end of the second capacitor C2 is connected to ground.

[0046] Specifically, the resistance values ​​of the first thermistor R3 and the second thermistor R6 change with temperature; the resistance decreases as the temperature increases. The first thermistor R3, connected in series with the first resistor R1, is connected to the external power supply and ground, forming a voltage divider circuit. When the temperature changes, the voltage at the series node changes accordingly. The main control chip U2 can obtain the voltage value by acquiring the voltage at the series node and converting it into the corresponding temperature. Similarly, the second thermistor R6, connected in series with the third resistor R4, is connected to the external power supply and ground, forming a voltage divider circuit. When the temperature changes, the voltage at the series node changes accordingly. The main control chip U2 can obtain the voltage value by acquiring the voltage at the series node and converting it into the corresponding temperature. The second resistor R2 and the fourth resistor R5 limit the current flowing into the main control chip U2, preventing excessive current from damaging it. The first capacitor C1 and the second capacitor C2 provide filtering.

[0047] Therefore, by using the first thermistor R3 in combination with the first resistor R1, the second resistor R2 and the first capacitor C1, and working with the main control chip U2, the accurate detection of the temperature of battery 111 can be achieved. Similarly, by using the second thermistor R6 in combination with the third resistor R4, the fourth resistor R5 and the second capacitor C2, and working with the main control chip U2, the accurate detection of the temperature of circuit board 210 can be achieved. The circuit structure is simple.

[0048] like Figures 1 to 3As shown, in an optional embodiment of this application, the wireless communication module 120 includes a Bluetooth communication unit 121 and a WIFI communication unit 122. Both the Bluetooth communication unit 121 and the WIFI communication unit 122 are connected to the multi-function chip U1. The Bluetooth communication unit 121 includes a first antenna connector ANT1, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a fifth resistor R7, a sixth resistor R8, a first inductor L1, a second antenna connector IPEX1, and a first electrostatic discharge protection tube ESD1. The fifth resistor R7 is connected in series with the first inductor L1 and then connected in series between the first radio frequency signal terminal of the multi-function chip U1 and the first antenna connector ANT1. Between one end, the series node of the fifth resistor R7 and the first inductor L1 is connected to one end of the sixth resistor R8 and one end of the third capacitor C3. The other end of the sixth resistor R8 is connected to the first end of the second antenna connector IPEX1, and the other end of the third capacitor C3 is grounded. The first RF signal end of the multi-function chip U1 is also connected to one end of the fourth capacitor C4 and one end of the first electrostatic discharge tube ESD1. The other ends of the fourth capacitor C4 and the first electrostatic discharge tube ESD1 are both grounded. One end of the fifth capacitor C5 is connected to the third end of the first antenna connector ANT1, and the other end is grounded. The second, third and fourth ends of the second antenna connector IPEX1 are all grounded.

[0049] Specifically, the first antenna connector ANT1 and the second antenna connector IPEX1 can be used to connect different types of Bluetooth antennas. The Bluetooth RF signal output by the multi-function chip U1 is transmitted to the Bluetooth antenna connected to the first antenna connector ANT1 via the fifth resistor R7 and the first inductor L1, or to the Bluetooth antenna connected to the second antenna connector IPEX1 via the sixth resistor R8 and the first inductor L1, realizing the transmission and reception of wireless signals. The third capacitor C3, the first inductor L1, and the fourth capacitor C4 form a CLC π-type network to achieve 50Ω antenna impedance matching, ensuring that the signal transmission efficiency from the multi-function chip U1 to the antenna is maximized. The fifth capacitor C5 and the equivalent inductance of the antenna constitute an LC resonant circuit. By adjusting the capacitance value, the resonant frequency of the antenna can be precisely controlled in the 2.4GHz band; by reasonably selecting the parameters of the series capacitors, the impedance bandwidth of the antenna can also be widened, so that it maintains stable performance in the 2.4GHz band. The first electrostatic discharge protection diode ESD1 is used to resist the impact of electrostatic discharge and instantaneous surge voltage on the circuit.

[0050] The Bluetooth antenna connected to the first antenna connector ANT1 or the second antenna connector IPEX1 can be a Bluetooth ceramic antenna. Bluetooth ceramic antennas are small in size, have stable signals, high communication reliability, and strong anti-interference capabilities.

[0051] like Figures 1 to 3As shown, in an optional embodiment of this application, the WIFI communication unit 122 includes a third antenna connector ANT2, a fourth antenna connector IPEX2, a second inductor L2, a third inductor L3, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, a seventh resistor R9, an eighth resistor R10, and a second electrostatic discharge (ESD) protection tube. The second inductor L2, the third inductor L3, and the seventh resistor R9 are connected in series between the second RF signal terminal of the multi-function chip U1 and the first terminal of the third antenna connector ANT2. One end of the second ESD protection tube and one end of the sixth capacitor C6 are both connected to the multi-function chip U1. The second RF signal terminal of chip U1 is grounded at the other end; one end of the seventh capacitor C7 and one end of the eighth capacitor C8 are both connected to the series node of the second inductor L2 and the third inductor L3, and the other ends are grounded; one end of the ninth capacitor C9 and one end of the eighth resistor R10 are both connected to the series node of the third inductor L3 and the seventh resistor R9, and the other end of the ninth capacitor C9 is grounded; the other end of the eighth resistor R10 is connected to the first terminal of the fourth antenna connector IPEX2, and the second, third and fourth terminals of the fourth antenna connector IPEX2 are all grounded; the second terminal of the third antenna connector ANT2 is grounded, and the third terminal is grounded through the tenth capacitor C10.

[0052] Specifically, the sixth capacitor C6, the second inductor L2, the seventh capacitor C7, the eighth capacitor C8, the third inductor L3, and the ninth capacitor C9 form a two-stage CLC π-type network. It employs a circuit structure with a pre-tuning network, a filtering network, and a calibration network. The first-stage network handles initial impedance transformation, while the second-stage network performs fine-tuning, resulting in lower return loss and a VSWR closer to the ideal 1:1 across the entire operating frequency band. The tenth capacitor C10 and the antenna's equivalent inductance constitute an LC resonant circuit. By adjusting the capacitor values, the antenna's resonant frequency can be precisely controlled within the 2.4GHz band. Furthermore, by appropriately selecting the parameters of the series capacitors, the antenna's impedance bandwidth can be broadened, maintaining stable performance within the 2.4GHz band. The third antenna connector ANT2 and the fourth antenna connector IPEX2 can connect to different types of Wi-Fi antennas.

[0053] This application also provides a control method for a recording device, applied to the recording device described above. The control method for the recording device includes: Upon receiving the first trigger signal, the main control chip U2 controls the first analog switch circuit 150 to switch based on the first trigger signal, so as to selectively connect the transmission interface 140 to the main control chip U2 or the second analog switch circuit 160. Upon receiving the second trigger signal, the main control chip U2 controls the second analog switch circuit 160 to switch based on the second trigger signal, so as to selectively connect the data transmission path or firmware upgrade path between the multi-function chip U1 and the first analog switch circuit 150.

[0054] In a specific implementation scenario, the first and second trigger signals can be generated by setting a button or an operation key in a related APP. The first analog switch circuit 150 is connected by default to the transmission interface 140 and the main control chip U2 to implement charging and discharging protocol control functions. When the main control chip U2 receives the first trigger signal (e.g., the first trigger signal is generated by setting the USB switch to open in the APP), it controls the first analog switch circuit 150 to switch to the input terminal of the second analog switch circuit 160. The second analog switch circuit 160 is connected by default to the USB flash drive function pin of the multi-function chip U1, enabling the function of reading recording data from the storage chip U7 through the transmission interface 140. When the main control chip U2 receives the second trigger signal (e.g., the first trigger signal is generated by setting a button to trigger), the first analog switch circuit 150 connects to the input terminal of the second analog switch circuit 160, and simultaneously the output channel of the second analog switch 160 switches to the upgrade pin of the multi-function chip U1, enabling the upgrade function of the multi-function chip U2 through the transmission interface 140.

[0055] In an optional embodiment of this application, the recording device further includes a third analog switch circuit 170 and a display module 180. The display module 180 includes a display driver chip U5 and a display unit 181 connected to the display driver chip U5. The third analog switch circuit 170 connects to the transmission interface 140, the main control chip U2, the power management circuit 110, and the display driver chip U5. The control method of the recording device further includes: Upon receiving the third trigger signal, the main control chip U2 controls the third analog switch circuit 170 to switch based on the third trigger signal, so as to selectively connect the transmission interface 140 to the power management circuit 110 or the display driver chip U5.

[0056] Specifically, the third trigger signal can also be generated by setting a button or an operation key in a related APP. The third analog switch circuit 170 is by default connected to the upgrade pin of the wireless charging module 114 of the transmission interface 140 and the power management circuit 110, enabling direct upgrades to the wireless charging module 114 via the transmission interface 140. When the third trigger signal is received (e.g., triggered by a button), the main control chip U2 controls the third analog switch circuit 170 to switch based on the third trigger signal. The third analog switch 170 switches to the upgrade pin connected to the display driver chip U5, enabling upgrades to the display driver chip U5 via the transmission interface 140.

[0057] In an optional embodiment of this application, when the recording device has OTA (Over The Air) capability, it receives the upgrade package transmitted from the APP through the WiFi communication unit 122 of the wireless communication module 120, stores it in the storage chip U7, and after the transmission is complete, the multi-function chip U1 reads each upgrade package from the storage chip U7 and sends it to the main control chip U2 and the wireless charging module 114 through the IIC bus, and sends it to the display driver chip U5 through the serial port, thereby realizing the upgrade of the main control chip U2, the wireless charging module 114 and the display driver chip U5.

[0058] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. A recording device, characterized in that, include: Power management circuitry; Wireless communication module, used for communicating with external devices; The recording module is used for recording operations and recording data storage operations; A multi-functional chip is connected to the wireless communication module and the recording module; The main control chip is connected to the power management circuit and the multi-functional chip. A transmission interface is connected to the power management circuit and to the main control chip via a first analog switch circuit. The second analog switch circuit is connected to the multi-functional chip and is connected to the transmission interface through the first analog switch circuit. The main control chip is used to control the switching of the first analog switch circuit so as to selectively connect the transmission interface to the main control chip or the second analog switch circuit. And control the switching of the second analog switch circuit to selectively connect the data transmission path or firmware upgrade path between the multi-functional chip and the first analog switch circuit.

2. The recording device according to claim 1, characterized in that, The first analog switch circuit includes a first analog switch, which has a first data bus terminal, a first channel, and a second channel. The first data bus terminal is connected to the transmission interface, and the first channel is connected to the firmware upgrade terminal of the main control chip. The second analog switch circuit includes a second analog switch, which has a second data bus terminal, a third channel, and a fourth channel. The second data bus terminal is connected to the second channel, the third channel is connected to the data transmission terminal of the multi-function chip, and the fourth channel is connected to the firmware upgrade terminal of the multi-function chip. The control terminals of the first analog switch and the second analog switch are both connected to the main control chip.

3. The recording device according to claim 1, characterized in that, The recording device further includes a third analog switch circuit and a display module. The display module includes a display driver chip and a display unit connected to the display driver chip. The third analog switch circuit connects the transmission interface, the main control chip, the power management circuit, and the display driver chip. The main control chip is also used to control the switching of the third analog switch circuit to selectively connect the transmission interface to the power management circuit or the display driver chip.

4. The recording device according to claim 3, characterized in that, The third analog switch circuit includes a third analog switch, which has a third data bus terminal, a fifth channel, and a sixth channel. The third data bus terminal is connected to the transmission interface, the fifth channel is connected to the firmware upgrade terminal of the power management circuit, the sixth channel is connected to the firmware upgrade terminal of the display driver chip, and the control terminal of the third analog switch is connected to the main control chip.

5. The recording device according to claim 1, characterized in that, The recording device further includes a housing, and the power management circuit, wireless communication module, recording module, multi-function chip, first analog switch circuit, second analog switch circuit and main control chip are all disposed within the housing. The housing includes a placement end face for placing electronic devices. The recording module includes a storage chip, a bone conduction microphone and at least one digital microphone. The storage chip, the bone conduction microphone and each of the digital microphones are all connected to the multi-function chip. The bone conduction microphone is fitted to the inner side of the placement end face, and each of the digital microphones is disposed on the inner side of the housing.

6. The recording device according to claim 5, characterized in that, The power management circuit includes a battery, a battery management module, a buck-boost module, and a wireless charging module. The buck-boost module is connected to the battery management module, the transmission interface, and the wireless charging module. The battery management module is connected to the battery. The wireless charging module is located on the inner side of the placement end face.

7. The recording device according to claim 6, characterized in that, The recording device also includes a circuit board, on which the main control chip, the first analog switch circuit, the third analog switch circuit, and the buck-boost module are all mounted. The recording device also includes a first temperature detection module and a second temperature detection module connected to the main control chip. The first temperature detection module is used to detect the temperature of the battery, and the second temperature detection module is used to detect the temperature of the circuit board.

8. The recording device according to claim 7, characterized in that, The first temperature detection module includes a first resistor, a second resistor, a first capacitor, and a first thermistor. The first resistor and the first thermistor are connected in series between an external power supply and ground. One end of the second resistor is connected to the series connection point of the first resistor and the first thermistor, and the other end is connected to the main control chip and one end of the first capacitor. The other end of the first capacitor is connected to ground. Alternatively, the second temperature detection module includes a third resistor, a fourth resistor, a second capacitor, and a second thermistor. The third resistor and the second thermistor are connected in series between an external power supply and ground. One end of the fourth resistor is connected to the series connection point of the third resistor and the second thermistor, and the other end is connected to the main control chip and one end of the second capacitor. The other end of the second capacitor is connected to ground.

9. The recording device according to any one of claims 1-8, characterized in that, The wireless communication module includes a Bluetooth communication unit and a WIFI communication unit, both of which are connected to the multi-functional chip. The Bluetooth communication unit includes a first antenna connector, a third capacitor, a fourth capacitor, a fifth capacitor, a fifth resistor, a sixth resistor, a first inductor, a second antenna connector, and a first electrostatic discharge (ESD) protection tube. The fifth resistor is connected in series with the first inductor and then connected in series between the first radio frequency (RF) signal terminal of the multi-functional chip and the first terminal of the first antenna connector. The series connection point of the fifth resistor and the first inductor is connected to one end of the sixth resistor and one end of the third capacitor. The other end of the sixth resistor is connected to the second antenna connector, and the other end of the third capacitor is grounded. The first RF signal terminal of the multi-functional chip is also connected to one end of the fourth capacitor and one end of the first ESD protection tube. The other ends of the fourth capacitor and the first ESD protection tube are both grounded. One end of the fifth capacitor is connected to the third terminal of the first antenna connector, and the other end is grounded.

10. A control method for a recording device, characterized in that, Applied to the recording device as described in any one of claims 1-9, the control method of the recording device includes: Upon receiving a first trigger signal, the main control chip controls the first analog switch circuit to switch based on the first trigger signal, so as to selectively connect the transmission interface to the main control chip or the second analog switch circuit. Upon receiving a second trigger signal, the main control chip controls the switching of the second analog switch circuit based on the second trigger signal to selectively connect the data transmission path or firmware upgrade path between the multi-functional chip and the first analog switch circuit.

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