A control circuit for a pneumatic wire cutter

Abstract

This utility model discloses a control circuit for a pneumatic thread cutter, including a main control circuit board and a display circuit board. The display circuit board includes a control chip IC1, whose input terminal is connected to a photoelectric sensor CN4 and a button module, and whose output terminal is connected to a display screen OLED1 and a communication interface CN5. The main control circuit board includes a main control chip IC3, whose input terminal is connected to a communication interface CN9 and a speed control potentiometer CN8, and whose output terminal is connected to a blade motor CN3 and a vacuum cleaner CN22. The communication interface CN5 is connected to the communication interface CN9. When the garment to be cut approaches the blade, the photoelectric sensor CN4 receives a signal and then transmits the signal to the control chip IC1. The control chip IC1 processes the signal and then communicates it to the main control chip IC3, which controls the start of the blade motor CN3 and the vacuum cleaner CN22. The start and stop of the blade and the vacuum cleaner are controlled electronically to achieve automatic start-up when needed, which is convenient for workers and reduces energy consumption.

Description

Technical Field

[0001] This utility model relates to garment processing, and more particularly to a control circuit for a pneumatic thread trimming machine. Background Technology

[0002] During garment production, excess threads are always left. Traditionally, these threads need to be trimmed manually by workers, which not only wastes manpower but is also inefficient. Existing technology includes thread trimming machines that automatically remove thread ends, significantly reducing reliance on manual labor. However, the cutting head of these machines still requires manual control by workers when needed, making operation somewhat cumbersome. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a control circuit for a pneumatic wire cutter.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A control circuit for a pneumatic wire cutter includes a main control circuit board and a display circuit board. The display circuit board includes a control chip IC1, whose input terminal is connected to a photoelectric sensor CN4 and a button module, and whose output terminal is connected to a display screen OLED1 and a communication interface CN5. The main control circuit board includes a main control chip IC3, whose input terminal is connected to a communication interface CN9 and a speed control potentiometer CN8, and whose output terminal is connected to a cutter head motor CN3 and a vacuum cleaner CN22. The communication interface CN5 is communicatively connected to the communication interface CN9.

[0006] In this invention, the thread trimmer is generally the next step after the sewing process. After the sewing process is completed, the worker will directly use the thread trimmer to remove the excess thread ends. Compared with the prior art, this invention controls the start and stop of the blade through electronic control so that it can be started automatically when needed. This makes it convenient for workers to use and reduces energy consumption.

[0007] As a further improvement of this utility model, the main control circuit board is connected to the power supply module, which includes a power supply terminal CN1, a step-down chip IC2, and a linear regulator IC4. The output terminal of the power supply terminal CN1 is connected to the input terminal of the rectifier bridge B1. A varistor ZNR1, a capacitor CX1, and a resistor R50 are connected in parallel between the power supply terminal CN1 and the rectifier bridge B1. The first pin of the rectifier bridge B1 is connected to the input terminal of the step-down chip IC2 through a thermistor TH1. The fourth pin of the rectifier bridge B1 is connected to the 37th pin of the main control chip IC3 through a capacitor C3. A capacitor C1, a capacitor C2, and a capacitor R2-resistor R4 are connected in parallel between the first and fourth pins of the rectifier bridge B1. The output terminal of the step-down chip IC2 is connected to the input terminal of the linear regulator IC4.

[0008] As a further improvement of this utility model, pin 25 of the main control chip IC3 is connected to pin 1 of transistor Q2 through resistor R42, pin 2 of transistor Q2 is connected to pin 1 of relay AH2, pin 2 of relay AH2 is connected to the output terminal of buck chip IC2 through resistor R54, a Zener diode D5 is connected between pin 1 and pin 2 of relay AH2, pin 3 of relay AH2 is connected to pin 2 of power supply terminal CN2, and pin 4 of relay AH2 is connected to pin 1 of cutter motor CN3.

[0009] As a further improvement of this utility model, pin 26 of the main control chip IC3 is connected to pin 1 of transistor Q1 through resistor R43, pin 2 of transistor Q2 is connected to pin 1 of relay AH3, pin 2 of relay AH3 is connected to the output terminal of step-down chip IC2 through resistor R55, a Zener diode D6 is connected between pin 1 and pin 2 of relay AH3, pin 3 of relay AH3 is connected to pin 2 of power supply terminal CN21, and pin 4 of relay AH3 is connected to pin 1 of vacuum cleaner CN22.

[0010] As a further improvement of this utility model, the third pin of the main control chip IC3 is connected to the second pin of the speed control potentiometer CN8 through a resistor R18, the first pin of the speed control potentiometer CN8 is grounded, the third pin of the speed control potentiometer CN8 is connected to the output terminal of the voltage regulator IC4, a resistor R28 is connected between the second and third pins of the speed control potentiometer CN8, and a capacitor C27 is connected between the first and second pins of the speed control potentiometer CN8.

[0011] As a further improvement of this utility model, the display circuit board includes a voltage regulator circuit, which includes a linear regulator IC5. The input terminal of the linear regulator IC5 is connected to the output terminal of the linear regulator IC4. The first pin of the linear regulator IC5 is grounded, and the second pin of the linear regulator IC5 is connected to the fifth and seventh pins of the display OLED1, respectively. A capacitor C21 is connected between the first and second pins of the linear regulator IC5.

[0012] As a further improvement of this utility model, the 11th pin of the control chip IC1 is connected to the 2nd pin of the photoelectric sensor CN4, the 1st pin of the photoelectric sensor CN4 is grounded, the 3rd pin of the photoelectric sensor CN4 is connected to the output terminal of the linear regulator IC4, a resistor R16 and a light-emitting diode D1 are connected in parallel between the 2nd and 3rd pins of the photoelectric sensor CN4, and a capacitor C14 is connected between the 1st and 2nd pins of the photoelectric sensor CN4.

[0013] As a further improvement of this utility model, a capacitor C6 is connected between pin 1 and pin 2 of the display OLED1, a capacitor C7 is connected between pin 3 and pin 4 of the display OLED1, and pins 8-12 of the display OLED1 are connected to pins 24-20 of the control chip IC1 through resistors R1, R10, R9, R8 and R7 respectively.

[0014] As a further improvement of this utility model, the button module includes buttons KEY1-KEY3, and pins 14-16 of the control chip IC1 are respectively connected to buttons KEY1-KEY3.

[0015] The beneficial effects of this utility model are as follows: The display circuit board of this utility model includes a control chip IC1. The input terminal of the control chip IC1 is connected to the photoelectric sensor CN4 and the button module, and the output terminal is connected to the display screen OLED1 and the communication interface CN5. The main control circuit board includes a main control chip IC3. The input terminal of the main control chip IC3 is connected to the communication interface CN9 and the speed adjustment potentiometer CN8, and the output terminal is connected to the blade motor CN3 and the vacuum cleaner CN22. The communication interface CN5 is connected to the communication interface CN9. When the garment that needs to be cut approaches the blade, the photoelectric sensor CN4 receives the signal and then transmits the signal to the control chip IC1. The control chip IC1 processes the signal and then communicates it to the main control chip IC3. The main control chip IC3 controls the start of the blade motor CN3 and the vacuum cleaner CN22. The start and stop of the blade and the vacuum cleaner are controlled electronically to achieve automatic start when needed, thereby reducing energy consumption. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is the schematic diagram of the main control chip and its peripheral circuits.

[0018] Figure 2 This is the circuit diagram of the power supply module.

[0019] Figure 3 This is the schematic diagram of the control chip and its peripheral circuits.

[0020] Figure 4 This is a schematic diagram of the display screen and its peripheral circuitry. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of this invention.

[0023] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0024] Reference Figures 1 to 4 A control circuit for a pneumatic wire cutter includes a main control circuit board and a display circuit board. The display circuit board includes a control chip IC1, the input of which is connected to a photoelectric sensor CN4 and a button module, and the output of which is connected to a display screen OLED1 and a communication interface CN5. The main control circuit board includes a main control chip IC3, the input of which is connected to a communication interface CN9 and a speed control potentiometer CN8, and the output of which is connected to a cutter motor CN3 and a vacuum cleaner CN22. This invention controls the start and stop of the cutting head and vacuum cleaner electronically. Specifically, when the garment that needs to have its thread cut near the cutting head, the photoelectric sensor CN4 receives a signal and transmits the signal to the control chip IC1. The control chip IC1 processes the signal and then communicates with the main control chip IC3. The main control chip IC3 then sends a start signal to the cutting head motor CN3 and the vacuum cleaner CN22, so that the cutting head and vacuum cleaner can be started simultaneously when needed. After the cutting head cuts off the excess thread, the vacuum cleaner sucks the cut thread into the storage bag for easy use. Conversely, when the garment moves away from the cutting head, the photoelectric sensor CN4 transmits a no-sensing signal to the control chip IC1. The control chip IC1 processes the signal and then communicates with the main control chip IC3, which then sends a stop signal to the cutting head motor CN3. When not in use, the cutting head and vacuum cleaner will be paused, thereby reducing energy consumption.

[0025] In this embodiment, the peripheral circuit of the main control chip IC3 also includes a communication interface CN9, a switch interface CN3, and a program burning interface CN10. The second and third pins of the communication interface CN9 are connected to the 14th and 15th pins of the main control chip IC3, respectively. The first pin of the switch interface CN3 is grounded, and the second pin is connected to the 24th pin of the main control chip IC3 through a resistor R15. A filter capacitor C26 is connected between the first and second pins of the switch interface CN3. When the user presses the switch interface CN3, a signal is transmitted to the main control chip IC3 to switch between automatic start / stop and manual start / stop of the cutting head, which is convenient for the user to select the mode.

[0026] The main control circuit board is connected to the power supply module, which includes a power terminal CN1, a step-down chip IC2, and a linear regulator IC4. Specifically, the step-down chip IC2 uses a common step-down type chip to step down the DC 310V high voltage to DC 15V. The output terminal of the power terminal CN1 is connected to the input terminal of the rectifier bridge B1. A varistor ZNR1, a capacitor CX1, and a resistor R50 are connected in parallel between the power terminal CN1 and the rectifier bridge B1. The first pin of the rectifier bridge B1 is connected to the input terminal of the step-down chip IC2 through a thermistor TH1. The fourth pin of the rectifier bridge B1 is connected to the 37th pin of the main control chip IC3 through a capacitor C3. A capacitor C1, a capacitor C2, and a capacitor R2-resistor R4 are connected in parallel between the first and fourth pins of the rectifier bridge B1. The output terminal of the step-down chip IC2 is connected to the input terminal of the linear regulator IC4. In this embodiment, the power terminal CN1 is connected to the live wire and neutral wire of the mains power. After the AC power of the mains power is rectified by the rectifier bridge B1, one path of the rectified power is transmitted to the main control chip IC3 to provide the start-up voltage for the main control chip IC3. The other path is stepped down by the buck chip IC2 and then regulated by the linear regulator IC4 to produce a working voltage suitable for the main control chip IC3.

[0027] Pin 25 of the main control chip IC3 is connected to pin 1 of transistor Q2 via resistor R42. Pin 2 of transistor Q2 is connected to pin 1 of relay AH2. Pin 2 of relay AH2 is connected to the output of step-down chip IC2 via resistor R54. A Zener diode D5 is connected between pins 1 and 2 of relay AH2. Pin 3 of relay AH2 is connected to pin 2 of power supply terminal CN2. Pin 4 of relay AH2 is connected to pin 1 of cutter motor CN3. In this embodiment, when the main control chip IC3 sends a start signal to cutter motor CN3, pins 2 and 3 of transistor Q2 conduct, causing pins 1 and 2 of relay AH2 to conduct. Pins 3 and 4 of relay AH2 are then closed, forming an electrical connection between power supply terminal CN2 and cutter motor CN3, thereby starting cutter motor CN3.

[0028] Pin 26 of the main control chip IC3 is connected to pin 1 of transistor Q1 via resistor R43. Pin 2 of transistor Q2 is connected to pin 1 of relay AH3. Pin 2 of relay AH3 is connected to the output of step-down chip IC2 via resistor R55. A Zener diode D6 is connected between pins 1 and 2 of relay AH3. Pin 3 of relay AH3 is connected to pin 2 of power supply terminal CN21. Pin 4 of relay AH3 is connected to pin 1 of vacuum cleaner CN22. In this embodiment, when the main control chip IC3 sends a start signal to vacuum cleaner CN22, pins 2 and 3 of transistor Q1 conduct, causing pins 1 and 2 of relay AH3 to conduct. Pins 3 and 4 of relay AH3 are then closed, forming an electrical connection between power supply terminal CN21 and blade motor CN22, thereby starting vacuum cleaner CN22.

[0029] The third pin of the main control chip IC3 is connected to the second pin of the speed control potentiometer CN8 through resistor R18. The first pin of the speed control potentiometer CN8 is grounded. The third pin of the speed control potentiometer CN8 is connected to the output terminal of the voltage regulator IC4. A resistor R28 is connected between the second and third pins of the speed control potentiometer CN8. A capacitor C27 is connected between the first and second pins of the speed control potentiometer CN8. The speed control potentiometer CN8 is used to adjust the speed of the vacuum cleaner. Using existing technology, by adjusting the speed control potentiometer CN8, the speed control potentiometer CN8 transmits an adjustment signal to the main control chip IC3, and then the main control chip IC3 sends a speed adjustment operation command to the vacuum cleaner.

[0030] The display circuit board includes a voltage regulator circuit, which includes a linear regulator IC5. The input terminal of the linear regulator IC5 is connected to the output terminal of the linear regulator IC4. The first pin of the linear regulator IC5 is grounded, and the second pin of the linear regulator IC5 is connected to the fifth and seventh pins of the display OLED1, respectively. A capacitor C21 is connected between the first and second pins of the linear regulator IC5. In this embodiment, the output terminal of the voltage regulator circuit supplies power to the display screen, and the output terminal of the linear regulator IC4 of the power supply module supplies power to the control chip IC1 and peripheral circuits.

[0031] Pin 11 of the control chip IC1 is connected to pin 2 of the photoelectric sensor CN4. Pin 1 of the photoelectric sensor CN4 is grounded, and pin 3 of the photoelectric sensor CN4 is connected to the output of the linear regulator IC4. A resistor R16 and a light-emitting diode D1 are connected in parallel between pin 2 and pin 3 of the photoelectric sensor CN4. A capacitor C14 is connected between pin 1 and pin 2 of the photoelectric sensor CN4. In this embodiment, when the photoelectric sensor CN4 detects a signal, it sends a signal to the control chip IC1, at which time the light-emitting diode D1 lights up. If no signal is detected, the light-emitting diode D1 turns off.

[0032] A capacitor C6 is connected between pin 1 and pin 2 of the display OLED1, and a capacitor C7 is connected between pin 3 and pin 4 of the display OLED1. Pins 8 to 12 of the display OLED1 are connected to pins 24 to 20 of the control chip IC1 through resistors R1, R10, R9, R8, and R7, respectively. In this embodiment, the information detected by the photoelectric sensor CN4 is transmitted to the control chip IC1, and the control chip IC1 transmits the detected information to the display OLED1 for display, so that the user can view it.

[0033] The button module includes buttons KEY1-KEY3. Pins 14-16 of the control chip IC1 are connected to buttons KEY1-KEY3 respectively. In this embodiment, pressing buttons KEY1-KEY3 sends different operation commands to the control chip IC1. For example, button KEY1 can manually control the start and stop of the blade motor. After sending the command to the control chip IC1, the control chip IC1 transmits the command to the communication interface CN9 through the communication interface CN5. The communication interface CN9 then transmits the operation command to the main control chip IC3, which controls the blade motor CN3. Additionally, button KEY2 can be used to control the operation of the vacuum cleaner CN22, and button KEY3 can be used to simultaneously start and stop the blade motor CN3 and the vacuum cleaner CN22. These can be adjusted according to user needs for ease of use.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control circuit for a pneumatic thread trimmer, characterized in that The system includes a main control circuit board and a display circuit board. The display circuit board includes a control chip IC1, whose input terminal is connected to a photoelectric sensor CN4 and a button module, and whose output terminal is connected to a display screen OLED1 and a communication interface CN5. The main control circuit board includes a main control chip IC3, whose input terminal is connected to a communication interface CN9 and a speed control potentiometer CN8, and whose output terminal is connected to a blade motor CN3 and a vacuum cleaner CN22. The communication interface CN5 is communicatively connected to the communication interface CN9.

2. The control circuit for a pneumatic thread trimmer according to claim 1, wherein The main control circuit board is connected to the power supply module, which includes a power terminal CN1, a step-down chip IC2, and a linear regulator IC4. The output of the power terminal CN1 is connected to the input of the rectifier bridge B1. A varistor ZNR1, a capacitor CX1, and a resistor R50 are connected in parallel between the power terminal CN1 and the rectifier bridge B1. The first pin of the rectifier bridge B1 is connected to the input of the step-down chip IC2 through a thermistor TH1. The fourth pin of the rectifier bridge B1 is connected to the 37th pin of the main control chip IC3 through a capacitor C3. A capacitor C1, a capacitor C2, and a capacitor R2-resistor R4 are connected in parallel between the first and fourth pins of the rectifier bridge B1. The output of the step-down chip IC2 is connected to the input of the linear regulator IC4.

3. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... Pin 25 of the main control chip IC3 is connected to pin 1 of transistor Q2 via resistor R42. Pin 2 of transistor Q2 is connected to pin 1 of relay AH2. Pin 2 of relay AH2 is connected to the output terminal of buck chip IC2 via resistor R54. A Zener diode D5 is connected between pin 1 and pin 2 of relay AH2. Pin 3 of relay AH2 is connected to pin 2 of power supply terminal CN2. Pin 4 of relay AH2 is connected to pin 1 of cutter motor CN3.

4. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... Pin 26 of the main control chip IC3 is connected to pin 1 of transistor Q1 via resistor R43. Pin 2 of transistor Q2 is connected to pin 1 of relay AH3. Pin 2 of relay AH3 is connected to the output terminal of step-down chip IC2 via resistor R55. A Zener diode D6 is connected between pin 1 and pin 2 of relay AH3. Pin 3 of relay AH3 is connected to pin 2 of power supply terminal CN21. Pin 4 of relay AH3 is connected to pin 1 of vacuum cleaner CN22.

5. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... The third pin of the main control chip IC3 is connected to the second pin of the speed control potentiometer CN8 through resistor R18. The first pin of the speed control potentiometer CN8 is grounded. The third pin of the speed control potentiometer CN8 is connected to the output terminal of the voltage regulator IC4. A resistor R28 is connected between the second and third pins of the speed control potentiometer CN8. A capacitor C27 is connected between the first and second pins of the speed control potentiometer CN8.

6. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... The display circuit board includes a voltage regulator circuit, which includes a linear regulator IC5. The input terminal of the linear regulator IC5 is connected to the output terminal of the linear regulator IC4. The first pin of the linear regulator IC5 is grounded. The second pin of the linear regulator IC5 is connected to the fifth and seventh pins of the display OLED1, respectively. A capacitor C21 is connected between the first and second pins of the linear regulator IC5.

7. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... Pin 11 of the control chip IC1 is connected to pin 2 of the photoelectric sensor CN4. Pin 1 of the photoelectric sensor CN4 is grounded. Pin 3 of the photoelectric sensor CN4 is connected to the output of the linear regulator IC4. A resistor R16 and a light-emitting diode D1 are connected in parallel between pin 2 and pin 3 of the photoelectric sensor CN4. A capacitor C14 is connected between pin 1 and pin 2 of the photoelectric sensor CN4.

8. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... A capacitor C6 is connected between pin 1 and pin 2 of the display OLED1, a capacitor C7 is connected between pin 3 and pin 4 of the display OLED1, and pins 8-12 of the display OLED1 are connected to pins 24-20 of the control chip IC1 through resistors R1, R10, R9, R8 and R7 respectively.

9. The control circuit of the pneumatic wire cutter according to claim 1, characterized in that... The button module includes buttons KEY1-KEY3, and pins 14-16 of the control chip IC1 are respectively connected to buttons KEY1-KEY3.

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