printer

Abstract

A printer includes a power supply device, a voice collection device, a control device and a printing device. The control device is connected to the power supply device, the voice collection device and the printing device. The power supply device is used to output a power supply current to the control device and adjust the amplitude of the power supply current according to the received adjustment instruction. The voice collection device is used to receive voice information and transmit it to the control device. The control device is used to receive data to be printed, and when it is detected that the voice information and the data to be printed meet the preset conditions, the control device outputs the adjustment instruction to the power supply device. It is also used to control the printing device to perform a printing operation according to the voice information and the data to be printed. When it is detected that the voice information and the data to be printed meet the preset conditions, the control device outputs the adjustment instruction to the power supply device to adjust the amplitude of the power supply current, so that the working current of the printer can be automatically adjusted according to actual needs without replacing the hardware, thereby improving the convenience of using the printer.

Description

Technical Field

[0001] The present application belongs to the field of electronic and electrical technology, and in particular, relates to a printer. Background Art

[0002] A printer is one of the output devices of a computer, and prints the computer processing results on relevant media. At present, a traditional printer includes a power adapter, a control unit and a printing unit. The power adapter supplies power to the control unit, and the control unit receives electronic document data and controls the printing unit to print the document content on paper or other media. The power adapter uses a power adapter with a constant output current (such as 12A). When the working current of the printer needs to be increased, the working current of the printer is changed by replacing a power adapter of a different model, which causes inconvenience to the user. Therefore, the traditional technical solution has the problem of low convenience of printer use. Summary of the invention

[0003] The purpose of the present application is to provide a printer, aiming to solve the problem of low usability of traditional printers.

[0004] A printer comprises a power supply device, a voice collection device, a control device and a printing device, wherein the control device is connected to the power supply device, the voice collection device and the printing device.

[0005] The power supply device is used to output the power supply current to the control device, and adjust the amplitude of the power supply current according to the received adjustment instruction;

[0006] The voice collection device is used to receive voice information and transmit it to the control device;

[0007] The control device is used to receive data to be printed, and when it is detected that the voice information and the data to be printed meet preset conditions, output an adjustment instruction to the power supply device; and is also used to control the printing device to perform a printing operation according to the voice information and the data to be printed.

[0008] In one of the embodiments, the preset conditions of the control device include that the sound detected by the voice collection device when receiving voice information is greater than a set volume threshold, or a whole row of black lines is printed.

[0009] In one of the embodiments, the control device is also used to, after outputting an adjustment instruction to the power supply device, perform a restart operation when it is detected that the output current amplitude of the power supply device exceeds a rated threshold and lasts for a preset time period; and perform a power-off operation when it is detected that the output current amplitude of the power supply device exceeds the rated threshold in more than a set number of restarts.

[0010] In one embodiment, the control device includes a controller, a display screen, function buttons and a data transmission interface. The controller is connected to the power supply device, the voice collection device and the printing device. The display screen, the function buttons and the data transmission interface are all connected to the controller.

[0011] In one embodiment, the power supply device includes an EMI (Electro Magnetic Interference) filter, a rectifier filter circuit, a transformer, an output circuit, a switch tube, a power supply control circuit and a feedback circuit, the EMI filter is connected to the rectifier filter circuit, the rectifier filter circuit is connected to the first primary winding of the transformer, the output circuit is connected to the secondary winding of the transformer and the controller, the switch tube is connected to the first primary winding of the transformer and the power supply control circuit, and the feedback circuit is connected to the output circuit and the current control circuit.

[0012] In one embodiment, the rectification and filtering circuit includes a rectifier bridge TR1, a capacitor C3, a capacitor C4, a resistor R9 and a diode D5, the input positive electrode of the rectifier bridge TR1 is connected to the first output end of the EMI filter, the input negative electrode of the rectifier bridge TR1 is connected to the second output end of the EMI filter, the output positive electrode of the rectifier bridge TR1 is connected to the first end of the first primary winding of the transformer and is grounded through the capacitor C3, and the output negative electrode of the rectifier bridge TR1 is grounded; the resistor R9 and the capacitor C4 are connected in parallel, and one end is connected to the first end of the first primary winding of the transformer, and the other end is connected to the cathode of the diode D5, and the anode of the diode D5 is connected to the second end of the first primary winding of the transformer.

[0013] In one embodiment, the output circuit includes a resistor R10, a capacitor C5, a capacitor C6 and a diode D6, a first end of the secondary winding of the transformer is connected to the anode of the diode D6, a second end of the secondary winding of the transformer is grounded, a cathode of the diode D6 is connected to the controller and grounded through the capacitor C6; the resistor R10 is connected in series with the capacitor C5, and the other end of the resistor R10 is connected to the anode of the diode D6, and the other end of the capacitor C5 is connected to the cathode of the diode C6.

[0014] In one embodiment, the power supply device further includes a resistor R1, a diode D1, a secondary converter D2 and a resistor R8, and the power supply control circuit includes a control chip, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a diode D3 and a diode D4.

[0015] The OTP port of the control chip is grounded through the resistor R2, the GND port of the control chip is grounded, the COMP port of the control chip is connected to the feedback circuit, the HV port of the control chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the second output end of the EMI filter, and the anode of the diode D2 is connected to the first output end of the EMI filter; the VCC port of the control chip is connected to one end of the resistor R3 and is grounded through the capacitor C1, the other end of the resistor R3 is connected to the cathode of the diode D3, and the The anode of the tube D3 is connected to the anode of the diode D4 and the first end of the second primary winding of the transformer, and the second end of the second primary winding of the transformer is grounded; the cathode of the diode D4 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the CS port of the control chip; the OUT port of the control chip is connected to the control end of the switch tube through the resistor R4, and is grounded through the resistor R6, the first end of the switch tube is connected to the second end of the first primary winding of the transformer, and the second end of the switch tube is grounded through the resistor R8; the CS port of the control chip is connected to the second end of the switch tube through the resistor R7, and is grounded through the capacitor C2.

[0016] In one embodiment, the feedback circuit includes a resistor R11, a resistor R12, a resistor R13, a capacitor C5, a capacitor C7, an optocoupler and a TL431 device, one end of the resistor R11 is connected to one end of the resistor R12 and the output circuit, the other end of the resistor R11 is connected to the input end of the transmitter of the optocoupler, the output end of the transmitter of the optocoupler is connected to the input end of the TL431 device, the output end of the TL431 device is grounded, the other end of the resistor R12 is connected to the reference end of the TL431 device and one end of the resistor R13, the other end of the resistor R13 is grounded, one end of the capacitor C7 is connected to the input end of the TL431 device, and the other end of the capacitor C7 is connected to the common end of the resistor R12 and the resistor R13; the input end of the receiving part of the optocoupler is connected to the power supply control circuit and is grounded through the capacitor C5, and the output end of the receiving part of the optocoupler is grounded.

[0017] In one embodiment, the voice collection device includes a microphone, a filter circuit, an analog-to-digital conversion circuit and a decoding circuit. The microphone is connected to the analog-to-digital conversion circuit through the filter circuit, and the decoding circuit is connected to the analog-to-digital conversion circuit and the controller.

[0018] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned printer receives the data to be printed and the voice information collected by the voice collection device through the control device, and controls the printing device to perform the printing operation according to the voice information and the data to be printed. When it is detected that the voice information and the data to be printed meet the preset conditions, the control device outputs an adjustment instruction to the power supply device to adjust the amplitude of the power supply current, so that the output current of the power supply device can be changed according to actual needs to automatically adjust the working current of the printer, without replacing the hardware, thereby improving the convenience of using the printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a printer in one embodiment of the present application;

[0020] Figure 2 This is a schematic diagram of the structure of a control device in an embodiment of the present application;

[0021] Figure 3 This is a schematic diagram of a power supply device in one embodiment of the present application;

[0022] Figure 4 Schematic diagram of the structure of a voice collection device in one embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] In one embodiment, a printer is provided, such as Figure 1 As shown, it includes a power supply device 100, a voice collection device 200, a control device 300 and a printing device 400, and the control device 300 is connected to the power supply device 100, the voice collection device 200 and the printing device 400. The power supply device 100 is used to output a power supply current to the control device 300, and adjust the amplitude of the power supply current according to the received adjustment instruction; the voice collection device 200 is used to receive voice information and transmit it to the control device 300; the control device 300 is used to receive data to be printed, and when it is detected that the voice information and the data to be printed meet the preset conditions, the adjustment instruction is output to the power supply device 100; the control device 300 is also used to control the printing device 400 to perform a printing operation according to the voice information and the data to be printed.

[0025] Specifically, the power supply device 100 can use a switching power supply, and according to the setting parameters, the external power supply is converted into a stable power supply current and then output to the control device 300 for power supply, so that the control device 300 can perform printing. The control device 300 can be connected to the host computer through the data transmission interface, receive the data to be printed issued by the host computer, and receive the voice information recorded by the voice collection device 200. The user can select the printing mode of the printer by inputting instructions, and control whether the voice collection device 200 works. For example, when the printer is set to normal mode, the control device 300 selects the data to be printed and prints it on paper or other media through the printing device 400. When the printer is set to voice printing mode, the control device 300 enables the voice collection device 200 to work for voice collection. The control device 300 selects the voice information recorded by the voice collection device 200, converts the voice information into printed text, and prints it on paper or other media through the printing device 400.

[0026] In addition, the control device 300 may also set priorities for the data to be printed and the voice information in advance, and perform the printing operation according to the saved priorities. For example, when the voice acquisition device 200 is working, the control device 300 receives the voice information recorded by the voice acquisition device 200, and preferentially converts the voice information into a printed text for printing. If the voice acquisition device 200 is not working, and the control device 300 does not receive the voice information, the control device 300 prints the received data to be printed. Depending on the type of printer, the specific structure of the printing device 400 is also different. Taking the printer as an inkjet printer as an example, the printing device 400 may include a nozzle, a driving mechanism and an ink supply device, and the nozzle is arranged on the driving mechanism and connected to the ink supply device. The control device 300 connects the driving mechanism and the nozzle, controls the driving mechanism to drive the nozzle to move according to the data to be printed, and controls the nozzle to spray ink, thereby printing text, patterns, etc. on the medium.

[0027] During the printing operation, the control device 300 also detects whether the voice information and the data to be printed meet the preset conditions, and when it is detected that the voice information and the data to be printed meet the preset conditions, it outputs an adjustment instruction to the power supply device 100 to control the power supply device 100 to adjust the amplitude of the power supply current, such as increasing or decreasing the amplitude of the power supply current. The specific content of the preset conditions is not unique and can be set according to actual needs. Specifically, when the voice information and the data to be printed do not meet the preset conditions, the power supply device 100 outputs a stable initial current to power the control device 300 according to the set parameters, so that the control device 300 can meet the normal working requirements. When it is detected that the voice information and the data to be printed meet the preset conditions, it can be considered that the printer needs a larger working current to perform the printing operation. At this time, the control device 300 outputs a control instruction to the power supply device 100, and the power supply device 100 increases the amplitude of the output current, so that the control device 300 can drive the printing device 400 to print the content to be printed at this time. For example, when it is necessary to print bold text or a whole black line, the output current of the power supply device 100 is increased to ensure that the printer can complete the printing operation and meet the high current demand of the printer. It can be understood that when it is detected again that the voice information and the data to be printed do not meet the preset conditions, or the power supply device 100 increases the output current amplitude for a set time, the control device 300 can also stop outputting the control instruction, and the power supply device 100 returns to outputting the initial current to power the control device 300, so as to avoid long-term high current power supply to damage the internal circuits and devices of the printer.

[0028] The above printer receives the data to be printed and the voice information collected by the voice collection device 200 through the control device 300, and controls the printing device 400 to perform the printing operation according to the voice information and the data to be printed. When it is detected that the voice information and the data to be printed meet the preset conditions, the control device 300 outputs an adjustment instruction to the power supply device 100 to adjust the amplitude of the power supply current, so that the output current of the power supply device 100 can be changed according to actual needs to automatically adjust the working current of the printer, without replacing the hardware, thereby improving the convenience of using the printer.

[0029] In one embodiment, the preset condition includes that the sound detected by the voice acquisition device 200 when receiving the voice information is greater than the set volume threshold, or the whole line of black lines is printed. Specifically, the specific value of the set volume threshold is not unique and can be set according to actual needs. When the voice acquisition device 200 performs voice acquisition, it can analyze the volume of the user's voice according to the amplitude of the induced electrical signal. If it is determined that the user's voice is greater than the set volume threshold, it can be considered that the speech content at this time is more important. The control device 300 outputs a control instruction to increase the amplitude of the output current of the power supply device 100, so that the control device 300 drives the printing device 400 to perform special processing when the printing operation is performed, such as bolding, increasing the font or underlining the text corresponding to the user's speech content at this time, so as to highlight the key points and meet the high current demand of the printer. In addition, when the control device 300 prints the data to be printed, if it is detected that the whole black line needs to be printed, it can also output a control instruction to increase the amplitude of the output current of the power supply device 100, so that the control device 300 can drive the printing device 400 to perform the printing operation and meet the high current demand of the printer.

[0030] In one embodiment, the control device 300 is also used to, after outputting an adjustment instruction to the power supply device 100, perform a restart operation when it is detected that the output current amplitude of the power supply device 100 exceeds the rated threshold and lasts for a preset time period; and perform a power-off operation when it is detected that the output current amplitude of the power supply device 100 exceeds the rated threshold in more than a set number of restarts.

[0031] Specifically, the specific value of the rated threshold is also not unique. When the output current amplitude of the power supply device 100 exceeds the rated threshold, it can be considered that the control device 300 is working in the peak state. When the control device 300 works in the peak state for a duration exceeding the preset time, it is restarted so that the power supply device 100 outputs the initial current to the control device 300 according to the set parameters again, so as to avoid the control device 300 working in the peak state for a long time and causing damage to the internal chip. In this embodiment, the preset time is 3 seconds.

[0032] Furthermore, when the amplitude of the output current of the power supply device 100 is detected to exceed the rated threshold value during the restarts exceeding the set number of times, it means that the control device 300 is operating at the peak state during the restarts of the set number of times. At this time, the control device 300 performs a power-off operation to control the power supply device 100 to stop supplying power, thereby preventing damage to circuit components or even fire, thereby improving the safety of the printer. In this embodiment, the set number of times is 3 times.

[0033] In one embodiment, Figure 2As shown, the control device 300 includes a controller 310, a display screen 320, a function button 330 and a data transmission interface 340. The controller 310 is connected to the power supply device 100, the voice collection device 200 and the printing device 400. The display screen 320, the function button 330 and the data transmission interface 340 are all connected to the controller 310. Among them, the controller 310 can adopt an MCU (Micro Control Unit), the display screen 320 can specifically select an LED (Light Emitting Diode) display screen, and the data transmission interface 340 may include an RS232 interface and a USB (Universal Serial Bus) interface connected to the controller 310. The RS232 interface is used to connect to a host computer, and the USB is used to connect to a U disk. The user can transmit the data to be printed to the controller 310 through the host computer or the U disk according to the actual situation, and the controller 310 controls the printing device 400 to perform the printing operation according to the received voice information and the data to be printed. The user can set the working mode of the printer through the function button 330, such as setting it to the normal mode or voice printing mode, and can also set the working parameters of the power supply device 100 through the function button 330, such as controlling the amplitude of the initial current output by the power supply device 100. The display screen 320 can be used to display information such as the working mode or working current of the printer for the user to view.

[0034] In one embodiment, Figure 3 As shown, the power supply device 100 includes an EMI filter 110, a rectifier filter circuit 120, a transformer T1, a power supply control circuit 130, an output circuit 140, a switch tube Q1 and a feedback circuit 150. The EMI filter 110 is connected to the rectifier filter circuit 120, the rectifier filter circuit 120 is connected to the first primary winding of the transformer T1, the output circuit 140 is connected to the secondary winding of the transformer and the controller 310, the switch tube Q1 is connected to the first primary winding of the transformer T1 and the power supply control circuit 130, and the feedback circuit 150 is connected to the output circuit 140 and the current control circuit 130. Among them, the switch tube Q1 can specifically adopt an MSO tube.

[0035] Among them, after the external AC power passes through the EMI filter 110, it is rectified and filtered by the rectifier and filter circuit 120 and then transmitted to the first primary winding of the transformer T1. The power supply control circuit 130 outputs a PWM (Pulse Width Modulation) signal to control the on and off of the switch tube Q1, so that the secondary winding of the transformer T1 generates an induced voltage, which is rectified and filtered by the output circuit 140 and then output to the controller 310 for power supply. The feedback circuit 150 samples the voltage output by the output circuit 140 and feeds back the obtained sampling result to the power supply control circuit 130. The power supply control circuit 130 changes the duty cycle of the PWM signal according to the sampling result, so that the output current of the power supply device 100 is constant.

[0036] When the controller 310 detects that the voice information and the data to be printed meet the preset conditions, it outputs a control instruction to the power supply control circuit 130. After receiving the control instruction, the power supply control circuit 130 increases the frequency of the PWM signal, thereby increasing the amplitude of the output current of the power supply device 100 to meet the high current demand of the printer.

[0037] The specific structure of the rectifier filter circuit 110 is not unique. In one embodiment, the rectifier filter circuit 120 includes a rectifier bridge TR1, a capacitor C3, a capacitor C4, a resistor R9 and a diode D5. The input positive electrode of the rectifier bridge TR1 is connected to the first output end of the EMI filter 110, the input negative electrode of the rectifier bridge TR1 is connected to the second output end of the EMI filter 110, the output positive electrode of the rectifier bridge TR1 is connected to the first end of the first primary winding of the transformer T1, and is grounded through the capacitor C3, and the output negative electrode of the rectifier bridge TR1 is grounded; after the resistor R9 and the capacitor C4 are connected in parallel, one end is connected to the first end of the first primary winding of the transformer T1, and the other end is connected to the cathode of the diode D5, and the anode of the diode D5 is connected to the second end of the first primary winding of the transformer T1. Among them, the rectifier bridge TR1 can adopt a full-bridge rectifier bridge to rectify the AC output of the EMI filter 110, and transmit it to the first primary winding of the transformer T1 after the AC clutter is filtered out by the capacitor C3. The structure composed of the capacitor C4, the resistor R9 and the diode D5 is used to suppress the voltage spike generated by the transformer T1.

[0038] In one embodiment, the output circuit 140 includes a resistor R10, a capacitor C5, a capacitor C6 and a diode D6. The first end of the secondary winding of the transformer T1 is connected to the anode of the diode D6, the second end of the secondary winding of the transformer T1 is grounded, the cathode of the diode D6 is connected to the controller 310 and is grounded through the capacitor C6; the resistor R10 is connected in series with the capacitor C5, and the other end of the resistor R10 is connected to the anode of the diode D6, and the other end of the capacitor C5 is connected to the cathode of the diode C6.

[0039] In one embodiment, continue to refer to Figure 3 The power supply device 100 further includes a resistor R1, a diode D1, a secondary switch D2 and a resistor R8, and the power supply control circuit 130 includes a control chip U1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a diode D3 and a diode D4. Among them, the control chip U1 can be a LD5760G2 chip.

[0040] The OTP port of the control chip U1 is grounded through the resistor R2, the GND port of the control chip U1 is grounded, the COMP port of the control chip U1 is connected to the feedback circuit 150, the HV port of the control chip U1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the second output end of the EMI filter 110, and the anode of the diode D2 is connected to the first output end of the EMI filter 110; the VCC port of the control chip U1 is connected to one end of the resistor R3 and is grounded through the capacitor C1, the other end of the resistor R3 is connected to the cathode of the diode D3, and the diode D The anode of the diode D3 is connected to the anode of the diode D4 and the first end of the second primary winding of the transformer T1, and the second end of the second primary winding of the transformer T1 is grounded; the cathode of the diode D4 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the CS port of the control chip U1; the OUT port of the control chip U1 is connected to the control end of the switch tube Q1 through the resistor R4 and is grounded through the resistor R6, the first end of the switch tube Q1 is connected to the second end of the first primary winding of the transformer T1, and the second end of the switch tube Q1 is grounded through the resistor R8; the CS port of the control chip U1 is connected to the second end of the switch tube Q1 through the resistor R7 and is grounded through the capacitor C2.

[0041] The control chip U1 changes the duty cycle of the PWM signal outputted from the OUT port according to the sampling result fed back by the feedback circuit 150, so that the output circuit 140 outputs a constant current. In addition, the COMP port of the control chip U1 can also be connected to the controller 310, and when receiving the control instruction sent by the controller 310, the frequency of the PWM signal is increased, thereby increasing the switching frequency of the switch tube Q1 (for example, from the conventional 65kHz to 130kHz), increasing the frequency of the primary winding of the transformer T1, and then increasing the output current of the secondary winding of the transformer to meet the high current demand of the printer.

[0042] In one embodiment, the feedback circuit 150 includes a resistor R11, a resistor R12, a resistor R13, a capacitor C5, a capacitor C7, an optocoupler OC1 and a TL431 device, one end of the resistor R11 is connected to one end of the resistor R12 and the output circuit 140, specifically connected to the cathode of the diode D6 in the output circuit 140. The other end of the resistor R11 is connected to the transmitter input end of the optocoupler OC1, the transmitter output end of the optocoupler OC1 is connected to the input end of the TL431 device, the output end of the TL431 device is grounded, the other end of the resistor R12 is connected to the reference end of the TL431 device and one end of the resistor R13, the other end of the resistor R13 is grounded, one end of the capacitor C7 is connected to the input end of the TL431 device, and the other end of the capacitor C7 is connected to the common end of the resistor R12 and the resistor R13; the receiving input end of the optocoupler OC1 is connected to the power supply control circuit 130, specifically connected to the COMP port of the control chip U1 in the power supply control circuit 130, the receiving input end of the optocoupler OC1 is grounded through the capacitor C5, and the receiving output end of the optocoupler OC1 is grounded.

[0043] The specific structure of the voice collection device 200 is not unique. In one embodiment, Figure 4 As shown, the voice collection device 200 includes a microphone 210, a filter circuit 220, an analog-to-digital conversion circuit 230 and a decoding circuit 240. The microphone 210 is connected to the analog-to-digital conversion circuit 230 through the filter circuit 220, and the decoding circuit 240 is connected to the analog-to-digital conversion circuit 230 and the controller 310. The microphone 210 collects the voice analog signal, and after being processed by the filter circuit 220, the analog-to-digital conversion circuit 230 performs analog-to-digital conversion to obtain a digital signal, and the decoding circuit 240 converts the digital signal into a corresponding text code and sends it to the controller 310. The controller 310 generates a printed text according to the received text code, and controls the printing device 400 to perform a printing operation according to the printed text.

[0044] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A printer, characterized in that: It includes a power supply device, a voice collection device, a control device and a printing device, wherein the control device is connected to the power supply device, the voice collection device and the printing device. The power supply device is used to output the power supply current to the control device, and adjust the amplitude of the power supply current according to the received adjustment instruction; The voice collection device is used to receive voice information and transmit it to the control device; The control device is used to receive the data to be printed, and when it is detected that the voice information and the data to be printed meet the preset conditions, output an adjustment instruction to the power supply device; It is also used to control the printing device to perform printing operations according to the voice information and the data to be printed; When the voice information and the data to be printed do not meet the preset conditions, the power supply device outputs a stable initial current to supply power to the control device according to the set parameters, so that the control device can meet the normal working requirements; The preset conditions include that the sound detected by the voice collection device when receiving voice information is greater than a set volume threshold, or a whole line of black lines is printed; The control device is also used to, after outputting the adjustment instruction to the power supply device, perform a restart operation when it is detected that the output current amplitude of the power supply device exceeds the rated threshold value and lasts for a preset time; and perform a power-off operation when it is detected that the output current amplitude of the power supply device exceeds the rated threshold value in more than a set number of restarts; The control device comprises a controller, a display screen, function buttons and a data transmission interface, the controller is connected to the power supply device, the voice collection device and the printing device, and the display screen, the function buttons and the data transmission interface are all connected to the controller; The power supply device includes an EMI filter, a rectifier and filter circuit, a transformer, an output circuit, a switch tube, a power supply control circuit and a feedback circuit. The EMI filter is connected to the rectifier and filter circuit, the rectifier and filter circuit is connected to the first primary winding of the transformer, the output circuit is connected to the secondary winding of the transformer and the controller, the switch tube is connected to the first primary winding of the transformer and the power supply control circuit, and the feedback circuit is connected to the output circuit and the current control circuit.

2. The printer according to claim 1, wherein: The rectifier and filter circuit includes a rectifier bridge TR1, a capacitor C3, a capacitor C4, a resistor R9 and a diode D5. The input positive electrode of the rectifier bridge TR1 is connected to the first output end of the EMI filter, the input negative electrode of the rectifier bridge TR1 is connected to the second output end of the EMI filter, the output positive electrode of the rectifier bridge TR1 is connected to the first end of the first primary winding of the transformer and is grounded through the capacitor C3, and the output negative electrode of the rectifier bridge TR1 is grounded; the resistor R9 and the capacitor C4 are connected in parallel, and one end is connected to the first end of the first primary winding of the transformer, and the other end is connected to the cathode of the diode D5, and the anode of the diode D5 is connected to the second end of the first primary winding of the transformer.

3. The printer according to claim 1, wherein: The output circuit includes a resistor R10, a capacitor C5, a capacitor C6 and a diode D6. The first end of the secondary winding of the transformer is connected to the anode of the diode D6, the second end of the secondary winding of the transformer is grounded, the cathode of the diode D6 is connected to the controller and grounded through the capacitor C6; the resistor R10 is connected in series with the capacitor C5, and the other end of the resistor R10 is connected to the anode of the diode D6, and the other end of the capacitor C5 is connected to the cathode of the diode C6.

4. The printer according to claim 1, wherein: The power supply device further includes a resistor R1, a diode D1, a diode D2 and a resistor R8, and the power supply control circuit includes a control chip, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a diode D3 and a diode D4. The OTP port of the control chip is grounded through the resistor R2, the GND port of the control chip is grounded, the COMP port of the control chip is connected to the feedback circuit, the HV port of the control chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the cathode of the diode D1 and the cathode of the diode D2, the anode of the diode D1 is connected to the second output end of the EMI filter, and the anode of the diode D2 is connected to the first output end of the EMI filter; the VCC port of the control chip is connected to one end of the resistor R3 and is grounded through the capacitor C1, the other end of the resistor R3 is connected to the cathode of the diode D3, and the The anode of the tube D3 is connected to the anode of the diode D4 and the first end of the second primary winding of the transformer, and the second end of the second primary winding of the transformer is grounded; the cathode of the diode D4 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the CS port of the control chip; the OUT port of the control chip is connected to the control end of the switch tube through the resistor R4, and is grounded through the resistor R6, the first end of the switch tube is connected to the second end of the first primary winding of the transformer, and the second end of the switch tube is grounded through the resistor R8; the CS port of the control chip is connected to the second end of the switch tube through the resistor R7, and is grounded through the capacitor C2.

5. The printer according to claim 1, wherein: The feedback circuit includes a resistor R11, a resistor R12, a resistor R13, a capacitor C5, a capacitor C7, an optocoupler and a TL431 device, one end of the resistor R11 is connected to one end of the resistor R12 and the output circuit, the other end of the resistor R11 is connected to the input end of the transmitter of the optocoupler, the output end of the transmitter of the optocoupler is connected to the input end of the TL431 device, the output end of the TL431 device is grounded, the other end of the resistor R12 is connected to the reference end of the TL431 device and one end of the resistor R13, the other end of the resistor R13 is grounded, one end of the capacitor C7 is connected to the input end of the TL431 device, and the other end of the capacitor C7 is connected to the common end of the resistor R12 and the resistor R13; the input end of the receiving part of the optocoupler is connected to the power supply control circuit and is grounded through the capacitor C5, and the output end of the receiving part of the optocoupler is grounded.

6. The printer according to claim 1, wherein: The voice collection device comprises a microphone, a filter circuit, an analog-to-digital conversion circuit and a decoding circuit. The microphone is connected to the analog-to-digital conversion circuit via the filter circuit, and the decoding circuit is connected to the analog-to-digital conversion circuit and the control device.

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