Brush brake control circuit

Abstract

The utility model relates to the technical field of dust collectors, and discloses a brush brake control circuit which is good in safety and reliable, the brush brake control circuit comprises a switch unit (120) and a main control unit (110), the switch unit (120) is used for receiving a first state signal or a second state signal and outputting a corresponding level signal according to the first state signal or the second state signal, and the main control unit (110) is connected with the switch unit (120). The main control unit (110) is used for receiving a level signal input by the switch unit (120); when the switch unit (120) receives a first state signal, the switch unit (120) is controlled to be conducted, an output level signal is in a low level state, and the main control unit (110) controls a motor to act according to the low level; and when the switch unit (120) receives the second state signal, the switch unit (120) is controlled to be turned off, the output level signal is in a high level state, and the main control unit (110) controls the motor to stop rotating according to the high level.

Description

Technical Field

[0001] This utility model relates to the field of vacuum cleaner technology, and more specifically, to a brush braking control circuit. Background Technology

[0002] As a type of cleaning robot, a sweeping robot can clean floors, freeing people from tedious daily cleaning work. When cleaning, a sweeping robot usually needs to drive a motor to rotate the brush to sweep away dust or debris on the floor. However, most sweeping robots use the brush to stall the motor, causing the motor to experience overcurrent. The overcurrent protection module then stops the motor to protect it, but this poses a safety hazard to the user (such as electric shock). Utility Model Content

[0003] The technical problem to be solved by this utility model is that, in most existing sweeping machines, the brush is used to stall the motor, causing overcurrent in the energized motor. The overcurrent protection module then stops the motor to achieve the purpose of protection, but this poses a safety hazard (such as electric shock) to the user. This utility model provides a brush braking control circuit with better safety and reliability.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct a brush braking control circuit, which is applied to a vacuum cleaner and has the following features:

[0005] A switching unit is configured within the braking control circuit. Its input terminal is used to receive a first state signal or a second state signal, and outputs a corresponding level signal according to the first state signal or the second state signal.

[0006] The main control unit has its input terminal connected to the output terminal of the switching unit, and is used to receive the level signal input by the switching unit;

[0007] When the switching unit receives the first state signal, the switching unit is controlled to be turned on, and the output level signal is in a low level state. The main control unit controls the motor to operate according to the low level.

[0008] When the switching unit receives the second state signal, the switching unit is controlled to turn off, and the output level signal is in a high level state. The main control unit controls the motor to stop rotating based on the high level.

[0009] In some embodiments, the switching unit includes at least a brake switch.

[0010] One end of the brake switch is used to receive the first status signal or the second status signal.

[0011] One end of the brake switch is connected to the input terminal of the main control unit.

[0012] The other end of the brake switch is connected to the common terminal.

[0013] In some embodiments, the switching unit further includes a first resistor, a first capacitor, and a second resistor.

[0014] The first resistor and the first capacitor are connected in series, and then connected in parallel with the brake switch and the second resistor.

[0015] One end of the first resistor and one end of the first capacitor are used to receive either the first state signal or the second state signal.

[0016] One end of the first resistor and one end of the first capacitor are also connected to the brake switch and one end of the second resistor.

[0017] The other end of the second resistor is coupled to the input terminal of the main control unit.

[0018] The other end of the first resistor is connected to the 5V power supply.

[0019] The other end of the first capacitor is connected to the common terminal.

[0020] In some implementations, the resistance value of the first resistor is selected as 10K.

[0021] The resistance value of the second resistor is selected as 100Ω.

[0022] In some implementations, the main control unit includes at least a main controller.

[0023] The input terminal of the main controller is connected to the other end of the second resistor.

[0024] The enable terminal of the main controller is connected to the control terminal of the motor.

[0025] The brush braking control circuit of this utility model includes a switching unit and a main control unit. The switching unit is used to receive a first state signal or a second state signal and output a corresponding level signal according to the first state signal or the second state signal. The main control unit is used to receive the level signal input by the switching unit. When the switching unit receives the first state signal, the switching unit is controlled to be turned on, and the output level signal is in a low level state. The main control unit controls the motor to operate according to the low level. When the switching unit receives the second state signal, the switching unit is controlled to be turned off, and the output level signal is in a high level state. The main control unit controls the motor to stop according to the high level. Compared with existing technologies, this method acquires two status signals of the motor through a switching unit and outputs corresponding level signals based on the acquired status signals. The main control unit receives the level signals output by the switching unit and controls the motor's operation (start or stop) based on the input level signal status, thereby ensuring the safety and reliability of the vacuum cleaner's operation. This effectively solves the problem of most sweeping machines using brushes to stall the motor, causing overcurrent in the powered motor. The overcurrent protection module then stops the motor to achieve the protection purpose, but this poses a safety hazard (such as electric shock) for the user. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0027] Figure 1 This is a circuit diagram of an embodiment of the brush braking control circuit provided by this utility model. Detailed Implementation

[0028] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0029] like Figure 1 As shown, in the first embodiment of the brush braking control circuit of this utility model, the brush braking control circuit 10 is applied to a vacuum cleaner, and it includes at least a main control unit 110 and a switching unit 120.

[0030] Among them, the main control unit 110 is the core of the control circuit, and it has the functions of signal processing, calculation and output control signals.

[0031] The switching unit 120 is used to acquire the brush's action status signal (corresponding to Deten SW), and output a corresponding level signal (high / low level signal) according to the acquired status signal, and output the level signal (high / low level signal) to the main control unit 110;

[0032] Specifically, the switching unit 120 is configured in the braking control circuit, and its input terminal is used to receive status signals when the brush is in motion / not in motion, such as a first status signal or a second status signal.

[0033] It outputs a corresponding level signal based on the input first or second state signal;

[0034] Furthermore, the input terminal of the main control unit 110 is connected to the output terminal of the switching unit 120 to receive the level signal input by the switching unit 120;

[0035] When the switching unit 120 receives the first state signal, the switching unit 120 is turned on, and the output level signal is low. The main control unit 110 controls the motor (not shown) to operate based on the low level.

[0036] Specifically, when the switching unit 120 receives the first state signal, the brush is not braked, and the motor shaft continues to control the brush movement.

[0037] When the switching unit 120 receives the second state signal, the switching unit 120 is controlled to turn off, and the output level signal is in a high level state. The main control unit 110 controls the motor to stop according to the high level.

[0038] Specifically, when the switching unit 120 receives the second state signal, the brush is braked and the motor stops running.

[0039] Using this technical solution, the switching unit 120 acquires two status signals of the motor and outputs corresponding level signals according to the acquired status signals. The main control unit 110 receives the level signals output by the switching unit 120 and controls the motor's operation (start or stop) according to the input level signal status, thereby ensuring the safety and reliability of the vacuum cleaner's operation. This effectively solves the problem of most sweeping machines using brushes to stall the motor, causing overcurrent in the powered motor. The overcurrent protection module then performs overcurrent protection on the motor, stopping the motor to achieve the purpose of protection. However, this poses a safety hazard (such as electric shock) to the user.

[0040] In some implementations, in order to ensure the reliability of the switching level signal, a braking switch SW1 can be provided in the switching unit 120, which has two working states: closed and open.

[0041] Specifically, one end of the brake switch SW1 is used to receive a first status signal or a second status signal.

[0042] The first state signal controls the brake switch SW1 to turn on, and the output level signal is in a low-level state.

[0043] The second state signal can control the brake switch SW1 to open, causing its output level signal to change from low level to high level.

[0044] Specifically, one end of the brake switch SW1 is connected to the input terminal of the main control unit 110, and outputs a level signal to the main control unit 110.

[0045] The other end of the brake switch SW1 is connected to the common terminal.

[0046] When the vacuum cleaner is in an upright position (i.e., the brake switch SW1 is open, so the switch is normally closed), the level of the input terminal of the main control unit 110 changes from low level to high level, and the motor is controlled to stop.

[0047] In some implementations, to ensure the reliability of the switching level signal, a first resistor R101, a first capacitor C101, and a second resistor R102 can be provided in the switching unit 120, wherein the resistance value of the first resistor R101 is selected as 10K and the resistance value of the second resistor R102 is selected as 100Ω.

[0048] Specifically, the first resistor R101 and the first capacitor C101 are connected in series, and then connected in parallel with the brake switch SW1 and the second resistor R102.

[0049] One end of the first resistor R101 and one end of the first capacitor C101 are used to receive the first state signal or the second state signal.

[0050] One end of the first resistor R101 and one end of the first capacitor C101 are also connected to the brake switch SW1 and one end of the second resistor R102.

[0051] The other end of the second resistor R102 is coupled to the input terminal of the main control unit 110.

[0052] The other end of the first resistor R101 is connected to the 5V power supply.

[0053] The other end of the first capacitor C101 is connected to the common terminal.

[0054] In some implementations, to ensure the reliability of motor control, a main controller U101 can be provided in the main control unit 110, wherein,

[0055] The input terminal (corresponding to pin 10) of the main controller U101 is connected to the other end of the second resistor R102.

[0056] The enable terminal (corresponding to pin 4) of the main controller U101 is connected to the control terminal of the motor.

[0057] Specifically, when one end of the input brake switch SW1 is the first state signal, the brake switch SW1 is turned on. The 5V voltage passes through the first resistor R101 and the common input terminal of the brake switch SW1, thereby pulling the level of the input terminal (corresponding to pin 10) of the main controller U101 to a low level.

[0058] When the signal at one end of the input brake switch SW1 is the second state signal, the brake switch SW1 is controlled to open. The 5V voltage is input to the input terminal of the main controller U101 (corresponding to pin 10) through the first resistor R101 and the second resistor R102, causing the level of the input terminal of the main controller U101 (corresponding to pin 10) to change from low level to high level. The control signal to stop the motor is output at the enable terminal of the main controller U101 (corresponding to pin 4).

[0059] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A brush braking control circuit, applied in a vacuum cleaner, characterized in that, have: A switching unit is configured within the braking control circuit. Its input terminal is used to receive a first state signal or a second state signal, and outputs a corresponding level signal according to the first state signal or the second state signal. The main control unit has its input terminal connected to the output terminal of the switching unit, and is used to receive the level signal input by the switching unit; When the switching unit receives the first state signal, the switching unit is controlled to be turned on, and the output level signal is in a low level state. The main control unit controls the motor to operate according to the low level. When the switching unit receives the second state signal, the switching unit is controlled to turn off, and the output level signal is in a high level state. The main control unit controls the motor to stop rotating based on the high level.

2. The brush braking control circuit according to claim 1, characterized in that, The switching unit includes at least a brake switch. One end of the brake switch is used to receive the first status signal or the second status signal. One end of the brake switch is connected to the input terminal of the main control unit. The other end of the brake switch is connected to the common terminal.

3. The brush braking control circuit according to claim 2, characterized in that, The switching unit further includes a first resistor, a first capacitor, and a second resistor. The first resistor and the first capacitor are connected in series, and then connected in parallel with the brake switch and the second resistor. One end of the first resistor and one end of the first capacitor are used to receive either the first state signal or the second state signal. One end of the first resistor and one end of the first capacitor are also connected to the brake switch and one end of the second resistor. The other end of the second resistor is coupled to the input terminal of the main control unit. The other end of the first resistor is connected to the 5V power supply. The other end of the first capacitor is connected to the common terminal.

4. The brush braking control circuit according to claim 3, characterized in that, The resistance value of the first resistor is selected as 10K. The resistance value of the second resistor is selected as 100Ω.

5. The brush braking control circuit according to claim 3, characterized in that, The main control unit includes at least a main controller. The input terminal of the main controller is connected to the other end of the second resistor. The enable terminal of the main controller is connected to the control terminal of the motor.

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